Excretion - The removal of metabolic waste from the body, Homeostasis - The maintenance of a constant internal environment, Ectotherm - External environment influences their temperature, Endotherm - Generate their own heat from metabolic reactions, Malpighian Layer - New skin cells are formed here via mitosis, Melanin - A pigment that protects the skin from UV Rays, Sebum - Oil that keeps hair flexible & Moist, stops skin from drying out, can cause acne, Epidermis - Prevents loss of water & barrier to pathogens, Dermis - Protects internal organs from damage, Vasoconstriction - Narrowing of blood vessels to contain heat., Vasodilation - Widening of the blood vessels to release heat, Piloerection - Hairs on the arms stand up., Cornified Layer - Layer of dead skin cells, lack blood vessels and has excess keratin,

Excretion Matching Exercise

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