fingerprints Flashcards
What does SWGFAST stand for?
scientific working group on friction ridge analysis, study and technology
what is the present day name for SWGFAST and what does it stand for?
OSAC: organization of scientific area committees
what are palmar ridges?
bottom of hands
what are plantar ridges?
bottom of feet
When does a fingerprint form?
6 month fetus (6 months pregnant)
what two people have the maximum genetic similarity/fingerprint similarity?
twins
how many sq. meters does skin cover?
1.5 to 2
how thick is skin?
2mm on palms, 4mm on heels, 0.5 on eyelids
what is the function of skin:
- container for skeleton
- sensory input
- elimination of waste
- gripping objects
what does sweat contain?
salts, amino acids, ammonia, and urea
what are the layers of skin
epidermis, and dermis
where are new skin cells formed?
adjacent to the dermis
what is the epidermis?
- outer layer of skin
- protective barrier
- constantly replacing cells
- consists of 5 layers
what is the dermis?
- inner layer of skin
- thick, fibrous and elastic giving skin flexibility and strength
- contains nerves, sweat glands, and blood vessels
- layer of connective tissue to support epidermis
- part of sensory reception and temperature regulation process
what components are in fingerprint secretions?
99% water
organic and inorganic salts
amino acids
fats
