integument system
1. Integument - a natural outer covering or coat, such as the skin or a membrane enclosing an organ2. Protection - skin serves as a protective barrier from mechanical injury and penetration of harmful chemicals Defense - first line of defense against any disease organism Prevention of Dehydration - immersed in an internal sea carefully regulated, dilute salt, solution that is essential to life Maintenance of Body Temperature - by sweating it helps regulate the body temperature Excretion of Wastes - sweat glands also excrete excess water and waste Reception of Stimuli - sensors for stimuli of (touch, pressure, heat, cold, and pain) and sends message to central nervous system Vitamin D Synthesis - when ultraviolet rays hit the skin, a cholesterol compound is changed into Vitamin D3. Epidermis - the outer most layer of the skin including dead cells of the stratum corneum and the living sub-layers of cell that give rise to them The epidermis contains: stratum, corneum. str
In hairless areas, the sebum comes out through ducts. Dermis - the thick layer of skin composed of irregular, dense, connective tissue beneath the skin The dermis contains: ducts, eccrine sweat gland, connective tissue papilla, hair follicle, root, sebaceous gland, arrector pili muscle Subcutaneous Layer - the layer of loose connective tissue and apidase tissue beneath the skin The subcutaneous layer contains: loose connective tissue and appendage tissue. The synthesis of melanin reactions is catalyzed by the enzyme tyrosinase; an inherited lack of tyrosinase activity results in one of the forms of albinism. These cells are constantly being replaced by new growth at the base of the glands. atum granvlosm, stratum spinosum, and stratum basale. Sebum may collect excessively as a result of poor hygiene, a diet rich in fats, or accelerated glandular activity, especially during adolescence. Tyrosinase is found in only one specialized type of cell, the melanocyte, and in this cell melanin is found in membrane-bound bodies called melanosomes. They secrete an oily substance called sebum. In humans, sebaceous glands are usually found with hair follicles but also occur in hairless areas of the skin, except for the palms of the hand and soles of the feet. Any one of a class of fibrous protein molecules that serve as structural units for various living tissues. It is one of two pigments found in human skin and hair and adds brown to skin color; the other pigment is carotene, which contributes yellow coloring. keratin - a fibrous protein that forms the basic structural component of hair and nails. The keratins are the major protein components of human hair.
Common topics in this essay:
Subcutaneous Layer,
Vitamin Synthesis,
,
Reception Stimuli,
Prevention Dehydration,
Excretion Wastes,
Body Temperature,
connective tissue,
stratum corneum,
loose connective tissue,
tissue beneath skin,
loose connective,
skin hair,
fibrous protein,
layer skin,
subcutaneous layer,
beneath skin,
sweat glands,
body temperature,
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Acceptance Essays
