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" ... not live. We therefore have over the whole body a tough coat which protects the delicate living body parts. The inner part of this coat is alive, but the part which comes in contact with the outside world is dead and keeps falling away in dry scales.... "
Primer of Hygiene: Being a Simple Textbook on Personal Health and how to Keep it - Trang 71
bởi John Woodside Ritchie, Joseph Stuart Caldwell - 1917 - 184 trang
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Elements of Biology: A Practical Text-book Correlating Botany, Zoology, and ...

George William Hunter - 1907 - 476 trang
...for a long period. THE SKIN Structure of the Skin. — In man, the skin is composed of two layers, an outer layer called the epidermis, and an inner layer called the derm/is. The outer part of the epidermis is composed of flattened dead cells. It is part of this layer that peels...

Primer of Hygiene

John Woodside Ritchie, Joseph Stuart Caldwell - 1910 - 200 trang
...take a bath. It is also one of the best forms of exercise, because it brings into play all the muscles of the body. (After Sorolla's " The Swimmers," in...inner layer called the dermis. The epidermis has no 71 lair epidermis blood vessels in it, but its inner part is alive and keeps growing to take the place...

New Primer of Hygiene: A Simple Textbook on Personal Health and how to Keep it

John Woodside Ritchie, Joseph Stuart Caldwell - 1919 - 170 trang
...one of the best forms of exercise, because it brings into play the muscles of all parts of the body. THE living parts of the body are extremely delicate...epidermis and an inner layer called the dermis. The dermis has no blood vessels in it, but its inner part is alive and epidermis keeps growing to take...




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