{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lec2IntegumentI - The Integumentary System I Overview...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
The Integumentary System I
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
• Integument=Skin Derived from a Latin word meaning “to cover” Skin is a complex, integrated, and dynamic organ that has functions beyond it’s role as a barrier to the environment Skin is the largest organ system in the body Overview
Background image of page 2
Integument I: Overview, Epidermis Integument II: Dermis, Glands, Hair Integument III: Digital Organs, Horn
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Basic architecture of skin is the same in all mammals There are differences in the thickness of different layers of skin in various regions of the body between species and within the same species Skin is thickest over the dorsal surface of the body and on the lateral surfaces of the limbs Overview
Background image of page 4
Functions of the Skin • Protection - trauma - desiccation - pathogens (bacteria and viruses) - UV light - noxious gases and fluids - camouflage • Secretory - primary source of water loss (primates and horses) - electrolytes (sweat) - fats and mucous (forms a barrier for protection) - pheromones (aids in interaction between members of a species)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Functions of the Skin Regulation of Body Temperature - release of water (sweating) for cooling - layer of insulation - blood flow regulation to maintain constant temperature Metabolic Functions - primary source of vitamin D via cellular interaction with sunlight - energy storehouse (adipose tissue, dermal fat pads)
Background image of page 6
Three Layers of Skin • Epidermis - Outermost layer of skin - Forms protective barrier - Keratinized stratified squamous epithelium - Outermost layer is composed of dead cells in mammals and birds - In regions with a heavy protective coat of hair, epidermis is thin - In non-hairy skin the epidermis is thicker - Hair and nails are epithelial tissues and as such are part of the epidermis - Digital organs (hoof, claw), feathers, horns are also considered epidermis
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Three Layers of Skin Dermis (Corium) - Located beneath the epidermis
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}