Module 4/Chapter 27/Integumentary System/Terms Relating to the Skin
Terms
undefined, object
copy deck
- Hair
- Deep lying cells in the hair root produce horny cells that move upward through the hair follicles. Melanocytes are located at the root of the hair follicle.
- How much do nails grow each week?
- 1 mm a week
- What is the purpose of sebum?
- lubricates the skin and minimizes water loss
- sweat glands
- Tiny,coiled glands found on almost all body surfaces concentrated in number in the palm of the hand and on the sole of the foot.
- About how many sweat glands are found in the palm of the hand and on the sole of the foot?
- 3000 glands/square inch
- Hair follicle
- shafts or sacs that hold the hair fibers
- How long does it take a toenail to regrow completely?
- 12-18 months
- Sebaceous glands are located in the dermis layer of the skin over the entire body, except for what 2 places on the body?
-
1)palms of the hands
2)soles of the feet - About how many sweat glands are found on our body?
- 2 million
- What happens to the hair when melanocytes stop producing melanin?
- hair turns gray
- nails
- horny plate covering and protecting part of the dorsal surface of the digits. A nail grows in thickness and length as a result of division of cells in the region of the nail root.
- How long does it take a fingernail to regrow?
- can regrow in 3-5 months
- What gland secretes an oily substance? Name the oily substance.
-
1)sebaceous gland
2)sebum - pore
- tiny opening on the surface of the skin
- What is almost pure water and is colorless and odorless?
- sweat or perspiration
- The odor produced when sweat accumulates on the skin is due to the action of what?
- action of bacteria on the sweat