integumentary system the skin and membranes. body membranes epithelial membranes a.cutaneous...
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![Page 1: Integumentary System The skin and membranes. Body Membranes Epithelial Membranes A.Cutaneous B.Mucous C.Serous](https://reader035.vdocuments.site/reader035/viewer/2022072006/56649d0b5503460f949ddff3/html5/thumbnails/1.jpg)
Integumentary System
The skin and membranes
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Body Membranes
• Epithelial MembranesA. CutaneousB. MucousC. Serous
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Body Membranes
• Connective A. Synovial
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Functions of the Skin
1. Protect
2. Excrete wastes
3. Regulate Body temp.
4. Make Vit. D and protect against UV
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Parts of the Skin
• EpidermisA. Corneum –top
layer, dead.
B. Lucindum – keratinonly in feet and hands
C. Granulosum – Middle layer
D. Spinosum – keratinE. Basale – bottom
Cell division
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Proteins and Pigments of Epidermis
• Collagen – protein fibers, strengthen skin• Keratin – waterproofs skin• Melanin – pigment, blocking UV rays• Carotene - pigment
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Parts of the Skin
• DermisA. Papillary layer• Provide nutrients and • Sensation for epidermis
B. Reticular layer• Glands• Pressure receptors• Phagocytes
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Receptors of the Dermis
A. Free Nerve endings - pain
B. Krause’s end bulbs – temp.
C. Meissner’s Corpuscles - touch
D. Pacinian Corpuscles - pressure