Iris muscle - Changes in ambient light cause this muscle to contract or relax, Ear drum - Sound waves with a large amplitude cause this organ to vibrate more vigorously, Olfactory receptor - Chemicals diffuse through the air and are detected here, Taste buds - Send a chemical message to the brain to recognise sweet or sour, Hair erector muscle - A decrease in ambient temperature makes this muscle contract,

by Anonymous

Leaderboard

Visual style

Options

Switch template

Continue editing: ?