Chapter 5 Integumentary System
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Created by:
xbejealous89x on November 6, 2008
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Prep or Dr. Rotella's test
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51 terms
Terms | Definitions |
|---|---|
 This system is the most taxed | Integumentary System |
| THE BODY | The integument covers |
| The Integumentary includes this. | skin, nails, hair, glands, muscles and nerves |
| the skin = | cutaneous membrane |
| functions of the skin | protect, maintain body temperature, detect changes in the environment, vitamin D synthesis, Excretion and absorption |
| 2 main parts of the integument | Epidermis & dermis |
| Epidermis | surface epithelial (superficial and thin layer) |
| Dermis | deeper connective tissue that has nerves and muscles (thicker layer) |
| Sub cutaneous ( sub Q) & Hypodermis | not part of the skin |
| Keratinocytes | 90% of epidermal cells |
| Keratinocytes | 4-5 layers thick |
| Keratinocytes | produce keratin |
| Keratinocytes | protect skin from heat, microorganisims & chemicals |
| Keratinocytes | produce lamellar granules that makes the skin water proof |
| Melanocytes | produce melanin |
| Langerhans cells | made in red bone marrow and migrate to epidermis |
| Langerhans cells | immune response |
| Merkel cells | sensory cells--include tactile disc and neuron = touch |
| Stratum Granulosum | keratin--losing cell organelles and nuclei |
| Stratum Granulosum | the transitional layer of living and dead cells |
| Stratum Corneum | flattened dead cells |
| Sub Q layer | Deeper part of dermis attaches to |
| Sub Q | bundles of collagen, coarse elastic fibers, adipose cells, hair follicles, nerves, oil and sweat glands. are found in |
| Deep dermis | has strength and elasticity , extensibility because of collagen and elastic fibers |
| Melanin | dark color |
| UV light | stimulates melanin production |
| Hemoglobin in blood | pink-red color |
| Carotene | yellow-orange color |
| genetics and hormones | influence the thickness & where hair is distributed |
| Hair consists of (2 things) | shaft (part we see) & root (part below) |
| Hair follicle | surrounds the root |
| Base of the bulb | includes growing matrix producing cells |
| Nerves (hair follicle) | hair root plexuses (sensitive to touch) |
| Muscle (Hair follicle) | Arrector pili (smooth muscle) |
| andogens are secreted to give us our hair growth | during puberty this occurs |
| andogens | responsible for baldness |
| 3 type of glands | sebaceous, sudoriferous, Ceruminous |
| Sebaceous Gland | not found in the palms or soles |
| Sebaceous Gland (function) | help keep hair from drying out, prevents excessive evaporation of H2O, keeps skin soft, inhibits bacteria growth |
| Eccrine Gland | starts functioning after birth |
| Apocrine sweat gland | starts functioning after puberty, stimulated during emothional stress and sexual excitement (cold sweat) |
| Ceruminous Gland | found in the external auditory canal--combines with sebum to produce earwax |
| Ceruminous Gland | prevent particles from affecting the ear drum and canal |
| Nail body | major visible portion |
| Free edge | part extending past finger or toe |
| Root | part not visible |
| Loss of collagen fibers | during aging |
| during aging | loss of elasticity |
| loss of immune response | during aging |
| DURING AGING | decreased melanocyte function |
| during aging* | Hair thinning occurs |
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