Did you know that your eyes will continue to grow until you are a teenager? Eyeballs will not grow any larger than an inch around. Learn more about the appearance and function of these body parts in Eyes, anAll About Your… book.

Did you know that the heart is a muscle in the circulatory system? The heart has four parts called chambers. Learn more about the appearance and function of this body part in Heart, an All About Your… book.

Did you know that your eyes will continue to grow until you are a teenager? Eyeballs will not grow any larger than an inch around. Learn more about the appearance and function of these body parts in Eyes, anAll About Your… book.

Did you know that the heart is a muscle in the circulatory system? The heart has four parts called chambers. Learn more about the appearance and function of this body part in Heart, an All About Your… book.