Need help with some questions for my homework?
Hair gives some protection to the skin. When cold, the hairs standing, increasing the thickness of the layer, and trapping the warmer air near the skin. Which of the following is responsible for the hair stand up? A. Dermal papilla B. The erector pili cells CD muscular hair follicle cortex of the hair shaft to investigate an animal with dyspnea, an instrument called a bronchoscope, is passed from the trachea to visualize the path air. The first structure encountered is a place where the trachea divides into small air channels. This site is called A. cones of the trachea. B. Carina C. bifurcation. Choanae D.. Please help is appreciated
A & B
Hair Formation
