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How many types of membranes are there in the body
- 1. Serous
- 2. Synovial membrane
- 3. Mucous membrane
- 4. Cutaneous membrane or skin membranes are layers of skin that cover parts and line cavities of the body.
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serous peritoneum or peritoneal membrane
lines the abdominopelvic cavity (peritonitis)
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Synovial membrane
synovium lines joint cavity
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Mucous membrane
Lines the vavities that open to the outside ex. mucousa of digestive tractm Mucosa of respiratory tract
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Cutaneous membrane or skin membranes
layers of skin that cover parts and line cavities of the body.
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Glands are secretory components of the body. The secretions they produce are needed in another part of the body (DIA).
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Glands
are secretory components of the body.
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Glands
The secretions they produce are needed in another part of the body (DIA)
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There are two types of GLANDS
Excocrine and Endocrine
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Exocrine Glands
have a duct and secrete outside the body ex.: Breast Milk
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Endocrine Glands
ductless grands that secrete inside the body through the blood vessels ex.:estrogen
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Facts about the skin
- Largest organ of the body
- Total surface area is 2sq meters or 300 sq inches
- Skin is 15% of your total body weight
- Varied thickness: eyelid skin - thinnest .02 mm, sole of foot 1.4 mm
- Where the skin blends with the mucous membrane skin color is 'Ruddy'
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How many layers form the skin?
Two layers, the epidermis and the dermis.
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Keratinization
when the cells pass throught the stratum lucidum and Keratin protein is added to cell they becom resistant to water, chemicals, radiation and Microbes.
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Hair shaft
Segment of the hair woutside the skin
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Hair root
Segment of the hair within the skin
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Sebaceous gland
Produces skin oil called sebum.
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Sebum
Oil produced by the sebaceous gland that lubricates the hair as well as the skin
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Sebaceus glands secretions is controlled by the _________________ System
Endocrine
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The amount of secretion from the ______________ glands varies with
age, puberty and pregnancy
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Hair follicle
below the sebaceious gland, currounds the lower hair root
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Hair papilla
produces the hair
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Pili Muscle or pilomotor muscle
muscle at the side of the hair follicle the pulls the hair to stand in cold and when frightened
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Sudoriferous Glands
Sweat Glands, Secrete sweat or perspiration, to cool the body and rids the body of waste through the pores. becomes odorous by the action of bacteria. The body looses o.5L of fluid per day through sweat
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Sudoriferous Glands
3,000 sweat glands within 1 sq inch of the skin
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Sudoriferous Glands
coiled, tubular glands, entire surface of the body except the lips, glans penis, and the inner surface of the prepuce.
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Apocrine
Secretes "milky" sweat rich with organic substances situated in the armpit and anogenital area, rich with protein and carbohydrates
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Eccrine
More widespread in the body, secretes watery sweat
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Skin cloration
- I. Fleshy colotation of the skin is due to the color of the blood reflected throught the skin
- II. Variation in skin coloration due to the concentration of the skin's dark brown pigment called melanin. Melanin is produced by the skin's pigment cells called melavocytes
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Cyanosis/cyanotic
Having blush skin due to blood having deficient oxygent
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Jaundice
Retention of Bilirubin makes skin yellowish. Millions of RBC's die normally every minute and they leave Bilirubin as residue. Body transports Bilirubin to the large intestine (makes feces yellow) and to the skin where white sun ray/light dissolves it. In Hemolytic disease. the skin can't cope in disposing Bilirubin and it turns yellow
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Erythema
skin's redness due to increased blood supply as in sunburn, 1rst degree burn and blushing on the face.
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