Question
click below
click below
Question
Normal Size Small Size show me how
Module 2e - A&P
Introduction to the Human Body
Question | Answer |
---|---|
hair | important functions: eyelashes and eyebrowe protect the eyes from dust and perspiration |
nasal hairs trap dust and prevent it from being inhaled into the lungs | |
hair of the scalp helps heep us warm and plays cosmetic role | |
hair growth | influenced by the sex hormones estrogen and testosterone |
parts of hair | shaft:the part above the surface of the skin |
root: part that extends from the dermis to the surface | |
hair color | genetically controlled and is determined by the type and amount of melanin |
arrector piili muscles | attached to the hair follicle is a bundle of smooth muscle cells |
alopecia | loss of hair genetic or drug re;ated |
nails | are thin plates of stratified squamous epithelial cells that contain a very hard form of keratin |
protect fingers and toes from injury | |
each nail has the following: free edge, nail body (fingernail), and nail root,lunula, and cuticle | |
nail clubbing | chronic lung and heart disease, insufficent supply of oxygenated blood over a period of time |
not pink | poor oxygenated blood makes nail bluish |
nail abuse | trauma to nail, causes nail to thick or hypertropy |
brittle | generally due to poorly oxygenated blood and nutritional anemias |