. A text-book in general physiology and anatomy. Physiology, Comparative; Anatomy. THE SKIN 353 this removal of body wastes are grouped together under the name of the excretory system. The hings, by remov- ing the carbon dioxide, may be inckxded in this system, but the removal of the principal body wastes is the work of the kidneys and the skin. The skin. â If we examine the surface of the body care- fully we find it everywhere covered with a layer of flexible, elastic tissue which we call the skin. The hair and nails are modifications of this tissue and are included in the study of skin struc
. A text-book in general physiology and anatomy. Physiology, Comparative; Anatomy. THE SKIN 353 this removal of body wastes are grouped together under the name of the excretory system. The hings, by remov- ing the carbon dioxide, may be inckxded in this system, but the removal of the principal body wastes is the work of the kidneys and the skin. The skin. â If we examine the surface of the body care- fully we find it everywhere covered with a layer of flexible, elastic tissue which we call the skin. The hair and nails are modifications of this tissue and are included in the study of skin structure. Examination of a section of the skin taken from any surface of the body shows it to consist of two distinct layers. The upper layer (epidermis, or cuticle) is thinner Homy layer Pigment layer Tactile Organs Nerveâ Blooi Vessels -â Sweat Gland'Z:^. Fig. 161 â Diagi-am of a section of skin. than the lower layer (dermis, or corium), and contains no blood vessels. Hence, it is possible to prick and even tear off portions of the epidermis without causing bleeding. -This epidermal layer varies greatly in thickness in different EDDT. PHYS,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Eddy, Walter Hollis, b. 1877. New York, Cincinnati [etc. ] American book Co
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