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Chapter 5
Chapter 5 Lecture Flashcards
| Question | Answer |
|---|---|
| Integumentary System includes | Skin, hair, nails, glands, muscles, nerves and related to the system |
| Functions | protection, maintenance of body temperature, provides sensory information from surroundings, reflects our emotions, shows some aspects of our normal physiology e.g. sweating, may indicate imbalances of homeostasis in body, important for self-image |
| derm= | skin |
| Cutan= | skin e.g. cutaneous |
| largest organ of the body | skin |
| 2 main parts | 1. epidermis 2. Dermis |
| epidermis | superficial; thinner part; epithelial tissue |
| dermis | true skin; deeper and thicker; connective tissue |
| Subcutaneous (subQ) layer | not part of the skin, but underneath dermis |
| Hypodermis | made up of areolar connective tissue and adipose tissue |
| Lamellated (pacinian corpuscles) | nerve endings sensitive to pressure found in hypodermis and sometimes dermis |
| epidermis | kerantinized, stratified, squamous epithelium, no nerves no blood vessels |
| 4 principle types of cells | Keratinocytes, melanocytes, langerhans cells, merkel cells |
| keratinocytes | produce protein keratin (waxy substance that makes skin waterproof) |
| Keratin | a protein that protects the skin and underlying tissue from heat, microbes, bacteria and water entry |
| melanocytes | cells that produce melanin pigment |
| melanin | skin color; absorbs damaging UV rays of sun, therefore protective |
| Langerhans cells | types of white blood cells from red bone marrow & migrates to skin leads to immune response |
| Merkel cells | cells in contact with sensory neuron (merkel disc) for sense of touch |
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