role of skin on thermoregulation by otieno Domnic

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ROLE OF SKIN IN THERMOREGULATIONby Domnic
OtienoSEGA GIRLS HIGH-2022
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Role of the skin in thermoregulation
STRUCTURE CONDITION
STRUCTURE when body temperature is raised above normal when body temperature is lowered below normal
Blood vessels/arterioles arterioles in the skin dilate more blood flows to the skin more heat is lost by convection and radiation arterioles in the skin constrict blood is diverted to a shunt system less blood flows to the skin/less heat is lost
erector-pili muscles erector-pili muscles relax, hair lies on skin less air is trapped, more heat is lost erector-pili muscles contract, hair stands erect more air is trapped, air is a bad conductor and insulates the body against heat loss
sweat glands sweat glands are more stimulated and more sweat is produced water in sweat evaporates and takes up heat from the body body is cooled/body temperature is lowered Sweat glands are less stimulated less fluids are absorbed by sweat glands less sweating, less vaporisation of water

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This means more heat is lost from the surface of
the skin
If the temperature rises, the blood vessel
dilates (gets bigger).
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This means less heat is lost from the surface of
the skin
If the temperature falls, the blood vessel
constricts (gets shut off).
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erector-pili muscles
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Sweating
The skin
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THE END