spiracles are openings to the trachea that go throughout the fly. flies have 9 spiracles per side
there are small muscles that control the opening of the spiracles. and single motor neurons that innervate the muscles.
spiracles are openings to the trachea that go throughout the fly. flies have 9 spiracles per side
there are small muscles that control the opening of the spiracles. and single motor neurons that innervate the muscles.