Microscope | Mitosis
Epithelial Tissue | Connective Tissue | Muscle Tissue | Nervous Tissue
Nervous System | Skin | Skeletal System
BIO 201 Home | Saundra Minckley
Skin
The Integumentary system includes skin and it's derivatives.
Skin is the largest organ of the body and is composed of three (3) layers;
the epidermis, the dermis, and the subcutaneous layer
(hypodermis). The derivatives of skin include; hair (pili), suderiferious
glands (sweat), sebaceus glands (oil) and the Arrector pili muscle. There
are many different types of neural receptors in skin (i.e. thermoceptors,
nociceptors, tactile receptors, etc.) Two tactile receptors are presented
below, Messiners and Pacinians corpuscles. Skin represents the body's first
line of defense against pathogens.
The images below are linked thumbnails. Click on
them for a larger version.
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