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Chapter 5

Chapter 5 Lecture Flashcards

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
Created by: JCrawford2580