November 13, 2014 Journal: List all eight layers of the skin in order from the outside to the inside.

Temperature Regulation as a means of regulating homeostasis

Changes in Blood Vessel Diameter Vasodilatation: As your body temperature rises, the blood vessels in your skin get larger in diameter. Hot blood is exposed to a cooler surrounding environment and heat leaves the body

Changes in Blood Vessel Diameter Vasoconstrict: As your body temperature decreases, blood vessels become smaller. This forces blood away from the skin and back towards the body’s core, where the heat is.

Sweat Glands When hot, they excrete water and salt onto the skins surface As it evaporates, cooling occurs Works well as long as you stay hydrated.

Hair on Your Skin Arrector pili muscles that connect to your hair cause them to stand up – Goose Bumps Causes pockets of air to form right above the skinand insulate the skin from the cooler surrounding environment.

What type of feedback mechanism is temperature regulation an example of?

What are other ways that the Integumentary system helps regulate homeostasis? Regulation of heat loss Regulation of water loss Regulation of pathogen entrance Regulation of the amount of sunlight entering the body Sensory receptors on the skin surface help to regulate responses to the environment