1Friction Ridges
- markings on the fingertips that leave oily fingertips on surfaces we touch
- allow ma no manipulation of small objects
2Flexion lines(flexion creases)
- lines on the flexor surfaces of the digits,palms,wrists,elbows
- skin bound to deeper tissues along these lines
- mark sites where skin folds during flexion of joints
3freckles and moles
tan to black aggregations of melanocytes
4helamngiomas(birthmarks)
patches of discolored skin cause by behind tumors of the dermal capillaries
5hair nails and cutaneous glands
- accessory organs of the skin
- composed of mostly dead karatinized cells
6hair( pilus,pili,)
another name for hair
7lanugo
fine ,downy,unpigmented hair that appears on the fetus in the last 3 months of development.
8terminal
- longer,coarser, and more heavily pigmented
- forms eyebrows,eyelashes,and the hair of the scalp
- after puberty forms pubic hair
- male facial hair ,also on trunk and limbs