This book is the first to concentrate on the structure and function of black skin. There are some physiological and structural differences between black and white skin; an area of intense interest is that of differences in response to sunlight and other damaging agents. An understanding of response to damaging agents is central to the problems of preventing or forestalling the early effects of aging in skin (a goal that is responsible for the current expansion in dermatological research).This book provides a concise multi-disciplinary insight into the biology, physiology, and chemistry of black skin. Primary emphasis is on the nature and origin of the pigmentary color and how this is related to specific properties of black skin, such as photoprotection and low incidence of skin cancers, that are lacking in white skin. Other topics covered include dermatology and cosmetics of black skin from a practical viewpoint of skin care and current treatments of pigmentary disorders. Black Skin is accessible to a broad range of readers from graduate students to specialists in physical anthropology, skin biology, dermatology, and cosmetology, as well as medical practitioners.- Explains the molecular basis of racial color differences and the chemistry of melanin- Covers the biologic uniqueness of black skin, including: Lack of elastosis in young skin; Keloid formation- Includes pigmentary disorders of black skin- Addresses the cosmetics of black skin

The Structure and Function of Skin, Third Edition is devoted to all matters pertaining to the structure and function of the skin. Drawing upon the accumulated data derived from embryology, histology, anatomy, physiology, biochemistry, and pharmacology, this book presents an overview of skin, with emphasis on human skin. Topics range from the biological functions of the dermis to the histochemical and microchemical properties of the epidermis; the effects of protein deficiency on hair growth; cutaneous innervation; nail regeneration and growth; sebaceous glands; and eccrine sweat glands.This book is organized into 12 chapters and begins with an overview of the structure and function of skin, and then discusses the epidermis and its structural features. Special consideration is given to the life cycle of epidermal cells; the properties and function of stratum corneum; and other cells in the epidermis including melanocytes, the cells of Langerhans, and Merkel cells. The chapters that follow focus on age-related changes in the dermis, cutaneous blood flow, changes in skin circulation, and the dermal nerve network. The book also considers hair growth and differentiation; the effects of malnutrition on the morphology of hair roots; and the structure and development of the nails. A chapter describing the cytochemistry and pharmacology of eccrine sweat glands concludes the book.This book is written primarily for dermatologists, whether seasoned veterans or neophytes, and will also be useful to all biologists who are interested in biomedical disciplines.

Sexual compatibility between male and female partners is in­ dispensable to normal and successful fertilization in mammals. Thus, the genes from males and females whose sexual behavior is characterized by awkwardness, ineptness, and miscues are elimi­ nated from the gene pool of the species. In human societies, this compatibility is not always evident; and the behavior that precedes and accompanies copulation and fertilization is exceed­ ingly complex and affected by many variables. As in most other species of animals, the entire repertoire of reproductive behavior of man is not well understood by man. When viewed, discussed, or reported, the topic is too often and most unfortunately regarded as an amalgam of emotion, mysticism, and biology. In the past, such emotion-charged approaches to the biologi­ cal fact of reproduction did much to obfuscate the subject; and as a result, much of the array of hormonal, neural, psychological, and social variables that control and insure the successful repro­ duction of the human species remains even now in Victorian ignor­ ance. But with the recent rash of books and scientific treatises on the subject, some progress has been made in elucidating human reproduction and associated sexual behavior. However, so entrench­ ed are some of our social taboos that the danger still lurks of equating social acceptance of the words with an understandin- all too lacking--of the process to which they refer.

Sexual compatibility between male and female partners is in­ dispensable to normal and successful fertilization in mammals. Thus, the genes from males and females whose sexual behavior is characterized by awkwardness, ineptness, and miscues are elimi­ nated from the gene pool of the species. In human societies, this compatibility is not always evident; and the behavior that precedes and accompanies copulation and fertilization is exceed­ ingly complex and affected by many variables. As in most other species of animals, the entire repertoire of reproductive behavior of man is not well understood by man. When viewed, discussed, or reported, the topic is too often and most unfortunately regarded as an amalgam of emotion, mysticism, and biology. In the past, such emotion-charged approaches to the biologi­ cal fact of reproduction did much to obfuscate the subject; and as a result, much of the array of hormonal, neural, psychological, and social variables that control and insure the successful repro­ duction of the human species remains even now in Victorian ignor­ ance. But with the recent rash of books and scientific treatises on the subject, some progress has been made in elucidating human reproduction and associated sexual behavior. However, so entrench­ ed are some of our social taboos that the danger still lurks of equating social acceptance of the words with an understandin- all too lacking--of the process to which they refer.

The Biology of Hair Growth is based on a conference on The Biology of Hair Growth, sponsored by the British Society for Research on Ageing, held at the Royal College of Surgeons, in London, 7-9 August 1957. The papers presented at this conference, and a few others, have been gathered in this book to serve as a source reference for all those interested in research on hair and hair growth. The application of modern methods in histology, cytology, histochemistry, physiology, electron microscopy, the use of radioactive isotopes, and modern biochemical techniques have given greater insight into the phenomena of growth and differentiation of hair follicles than ever before. The book opens with a chapter on the embryology of hair. Separate chapters follow on the anatomy and histochemistry of the hair follicle; the electron microscopy of keratinized tissues; the chemistry of keratinization; the mitotic activity of the follicle; and the the vascularity and patterns of growth of hair follicles. Subsequent chapters deal with behavior of pigment cells and epithelial cells in the hair follicle; the nature of hair pigment; the effects of nutrition on hair growth; and effects of chemical agents, ionizing radiation, and particular illnesses on hair roots.

The Epidermis documents the proceedings of a symposium that explored in detail the fundamental aspects of the epidermis and the still poorly understood process of keratinization. The Division of Dermatology, University Extension and the School of Medicine of the University of California at Los Angeles agreed to sponsor the conference and offered the University''s Residential Conference Center at Lake Arrowhead for the meeting place. This volume is a source book of basic dermatologic thought and information. More than a book of dermatology, this volume makes a singular contribution to our knowledge of keratinization. The volume contains 37 papers and opens with an introductory chapter on keratinization, focusing on the history of the keratohyalin granules, the role of lipids in the orderly keratinization of the epidermis, and the desquamation process. Subsequent chapters present studies on topics such as the behavior of the skin; the effects of various experimental conditions on keratinization in organ culture; and the localization and the regional variability in the concentration epidermal enzymes.

Advances in Biology of Skin, Volume 3: The Sebaceous Glands covers the proceedings of the 1962 Brown University Symposium on the Biology of Skin. The symposium considers the developmental sequences of sebaceous glands in man, their structural and functional attributes, and the analysis of skin surface lipids and their synthesis. This book is organized into 14 chapters, and starts with an introduction to the sebaceous glands. The subsequent chapter deals with the sebaceous glands in oral and lip mucosa. These topics are followed by discussions on ectopic sebaceous glands and the structure of sebaceous glands of man. Other chapters describe the effect of age and sex on the metabolism of rat, as well as the problems in the analysis of sebum. The last chapters consider the hormonal control of sebaceous glands in both animals and humans. This book will be of value to biologists and research workers.

Advances in Biology of Skin, Volume VII: Carcinogenesis covers proceedings of the 15th Symposium on the Biology of Skin, held at the Oregon Regional Primate Research Center on April 9-11, 1965, under the auspices of the University of Oregon Medical School. This book is composed of nineteen chapters, and begins with the mechanism of tissue homeostasis in adult mammals and the kinetics of epidermal reaction to carcinogenic agents and other skin irritants. The succeeding chapters deal with the growth promoting effects of tumors on tissues, the reaction pattern distinctions between normal and neoplastic epithelium, and some biological implications of chemical carcinogenesis. Considerable chapters are devoted to various carcinogens, including hydrocarbons, viruses, androgens, and estrogens. Other chapters consider the physicochemical mechanisms of acceleration of skin carcinogenesis and experimental observations of environmental carcinogenesis. The mechanisms of skin cancer induction due to ultraviolet radiation, as well as arsenic induced tumors are examined. The concluding chapters describe some forms of skin tumors, such as adnexal tumors and basal cell epithelioma. This book will prove useful to oncologists and researchers in the field of carcinogenesis.

This book is the first to concentrate on the structure and function of black skin. There are some physiological and structural differences between black and white skin; an area of intense interest is that of differences in response to sunlight and other damaging agents. An understanding of response to damaging agents is central to the problems of preventing or forestalling the early effects of aging in skin (a goal that is responsible for the current expansion in dermatological research).This book provides a concise multi-disciplinary insight into the biology, physiology, and chemistry of black skin. Primary emphasis is on the nature and origin of the pigmentary color and how this is related to specific properties of black skin, such as photoprotection and low incidence of skin cancers, that are lacking in white skin. Other topics covered include dermatology and cosmetics of black skin from a practical viewpoint of skin care and current treatments of pigmentary disorders. Black Skin is accessible to a broad range of readers from graduate students to specialists in physical anthropology, skin biology, dermatology, and cosmetology, as well as medical practitioners.- Explains the molecular basis of racial color differences and the chemistry of melanin- Covers the biologic uniqueness of black skin, including: Lack of elastosis in young skin; Keloid formation- Includes pigmentary disorders of black skin- Addresses the cosmetics of black skin

The Structure and Function of Skin, Third Edition is devoted to all matters pertaining to the structure and function of the skin. Drawing upon the accumulated data derived from embryology, histology, anatomy, physiology, biochemistry, and pharmacology, this book presents an overview of skin, with emphasis on human skin. Topics range from the biological functions of the dermis to the histochemical and microchemical properties of the epidermis; the effects of protein deficiency on hair growth; cutaneous innervation; nail regeneration and growth; sebaceous glands; and eccrine sweat glands.This book is organized into 12 chapters and begins with an overview of the structure and function of skin, and then discusses the epidermis and its structural features. Special consideration is given to the life cycle of epidermal cells; the properties and function of stratum corneum; and other cells in the epidermis including melanocytes, the cells of Langerhans, and Merkel cells. The chapters that follow focus on age-related changes in the dermis, cutaneous blood flow, changes in skin circulation, and the dermal nerve network. The book also considers hair growth and differentiation; the effects of malnutrition on the morphology of hair roots; and the structure and development of the nails. A chapter describing the cytochemistry and pharmacology of eccrine sweat glands concludes the book.This book is written primarily for dermatologists, whether seasoned veterans or neophytes, and will also be useful to all biologists who are interested in biomedical disciplines.

Sexual compatibility between male and female partners is in­ dispensable to normal and successful fertilization in mammals. Thus, the genes from males and females whose sexual behavior is characterized by awkwardness, ineptness, and miscues are elimi­ nated from the gene pool of the species. In human societies, this compatibility is not always evident; and the behavior that precedes and accompanies copulation and fertilization is exceed­ ingly complex and affected by many variables. As in most other species of animals, the entire repertoire of reproductive behavior of man is not well understood by man. When viewed, discussed, or reported, the topic is too often and most unfortunately regarded as an amalgam of emotion, mysticism, and biology. In the past, such emotion-charged approaches to the biologi­ cal fact of reproduction did much to obfuscate the subject; and as a result, much of the array of hormonal, neural, psychological, and social variables that control and insure the successful repro­ duction of the human species remains even now in Victorian ignor­ ance. But with the recent rash of books and scientific treatises on the subject, some progress has been made in elucidating human reproduction and associated sexual behavior. However, so entrench­ ed are some of our social taboos that the danger still lurks of equating social acceptance of the words with an understandin- all too lacking--of the process to which they refer.

Sexual compatibility between male and female partners is in­ dispensable to normal and successful fertilization in mammals. Thus, the genes from males and females whose sexual behavior is characterized by awkwardness, ineptness, and miscues are elimi­ nated from the gene pool of the species. In human societies, this compatibility is not always evident; and the behavior that precedes and accompanies copulation and fertilization is exceed­ ingly complex and affected by many variables. As in most other species of animals, the entire repertoire of reproductive behavior of man is not well understood by man. When viewed, discussed, or reported, the topic is too often and most unfortunately regarded as an amalgam of emotion, mysticism, and biology. In the past, such emotion-charged approaches to the biologi­ cal fact of reproduction did much to obfuscate the subject; and as a result, much of the array of hormonal, neural, psychological, and social variables that control and insure the successful repro­ duction of the human species remains even now in Victorian ignor­ ance. But with the recent rash of books and scientific treatises on the subject, some progress has been made in elucidating human reproduction and associated sexual behavior. However, so entrench­ ed are some of our social taboos that the danger still lurks of equating social acceptance of the words with an understandin- all too lacking--of the process to which they refer.

The Biology of Hair Growth is based on a conference on The Biology of Hair Growth, sponsored by the British Society for Research on Ageing, held at the Royal College of Surgeons, in London, 7-9 August 1957. The papers presented at this conference, and a few others, have been gathered in this book to serve as a source reference for all those interested in research on hair and hair growth. The application of modern methods in histology, cytology, histochemistry, physiology, electron microscopy, the use of radioactive isotopes, and modern biochemical techniques have given greater insight into the phenomena of growth and differentiation of hair follicles than ever before. The book opens with a chapter on the embryology of hair. Separate chapters follow on the anatomy and histochemistry of the hair follicle; the electron microscopy of keratinized tissues; the chemistry of keratinization; the mitotic activity of the follicle; and the the vascularity and patterns of growth of hair follicles. Subsequent chapters deal with behavior of pigment cells and epithelial cells in the hair follicle; the nature of hair pigment; the effects of nutrition on hair growth; and effects of chemical agents, ionizing radiation, and particular illnesses on hair roots.

The Epidermis documents the proceedings of a symposium that explored in detail the fundamental aspects of the epidermis and the still poorly understood process of keratinization. The Division of Dermatology, University Extension and the School of Medicine of the University of California at Los Angeles agreed to sponsor the conference and offered the University''s Residential Conference Center at Lake Arrowhead for the meeting place. This volume is a source book of basic dermatologic thought and information. More than a book of dermatology, this volume makes a singular contribution to our knowledge of keratinization. The volume contains 37 papers and opens with an introductory chapter on keratinization, focusing on the history of the keratohyalin granules, the role of lipids in the orderly keratinization of the epidermis, and the desquamation process. Subsequent chapters present studies on topics such as the behavior of the skin; the effects of various experimental conditions on keratinization in organ culture; and the localization and the regional variability in the concentration epidermal enzymes.

Advances in Biology of Skin, Volume 3: The Sebaceous Glands covers the proceedings of the 1962 Brown University Symposium on the Biology of Skin. The symposium considers the developmental sequences of sebaceous glands in man, their structural and functional attributes, and the analysis of skin surface lipids and their synthesis. This book is organized into 14 chapters, and starts with an introduction to the sebaceous glands. The subsequent chapter deals with the sebaceous glands in oral and lip mucosa. These topics are followed by discussions on ectopic sebaceous glands and the structure of sebaceous glands of man. Other chapters describe the effect of age and sex on the metabolism of rat, as well as the problems in the analysis of sebum. The last chapters consider the hormonal control of sebaceous glands in both animals and humans. This book will be of value to biologists and research workers.

Advances in Biology of Skin, Volume VII: Carcinogenesis covers proceedings of the 15th Symposium on the Biology of Skin, held at the Oregon Regional Primate Research Center on April 9-11, 1965, under the auspices of the University of Oregon Medical School. This book is composed of nineteen chapters, and begins with the mechanism of tissue homeostasis in adult mammals and the kinetics of epidermal reaction to carcinogenic agents and other skin irritants. The succeeding chapters deal with the growth promoting effects of tumors on tissues, the reaction pattern distinctions between normal and neoplastic epithelium, and some biological implications of chemical carcinogenesis. Considerable chapters are devoted to various carcinogens, including hydrocarbons, viruses, androgens, and estrogens. Other chapters consider the physicochemical mechanisms of acceleration of skin carcinogenesis and experimental observations of environmental carcinogenesis. The mechanisms of skin cancer induction due to ultraviolet radiation, as well as arsenic induced tumors are examined. The concluding chapters describe some forms of skin tumors, such as adnexal tumors and basal cell epithelioma. This book will prove useful to oncologists and researchers in the field of carcinogenesis.