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Integumentary

Chapter 5

QuestionAnswer
What are two regions of integument? 1, Epidermis 2. Dermis (only vascular)
What is the hypodermis? The subcutaneous Tissue. NOT part of the skin. 'Superficial Fascia' bc it is superficial to the tough C.T. wrapping of the skeletal muscle. Adipose tissue, shock absorber and insulator that reduces heat loss.
What are the layers of the skin 1. Stratum Corneum 2. Stratum Lucidum (only in thick shin) 3. stratum granulosum 4. Stratum spinocum 5. Stratum Basale
What are the cell of the epidermis 1. Keratinocytes 2.Melanocytes 3. Dendritic Cell 4. Tactile Cells
Keratinocytes cell of epidermis- Produce keratin, the fibrous protein that helps give the epidermis its protective layer, develop in basale, undergo mitosis for growth, slough off time they reach corneum. tightly connected by desmosomes.
Melanocytes cell of epidermis, synthesize the pigment melanin, found in basale, accumulate granules -malanosome protect apical surface of keratinocytes nucleus from UV damage
Dendritic Cells ingest foreign substances and are key activators of immune system phagocytes= devour, mature
tactile Cells sensory receptor for touch
Layers of skin Stratum Cornuem Stratum Lucidum (only in tough skin) Stratum Granulosum Stratum Spinosum Stratum Basale
Created by: 1jessie