FRSC 3010 LECTURE 3 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
fingerprint
An impression of the friction ridges of all or any part of the finger
SWGFAST
Scientific Working Group on Friction Ridge Analysis, Study, and Technology (now
known as Organization of Scientific Area Committees - OSAC)
palmer
bottom of hands
plantar
bottom of feet
theories of fingerprints
1. human friction ridge skin is unique
2. human friction ridge skin is persistent (permanent) throughout the individual's lifetime
fingerprint formation
• Fingerprints are fully formed by the time a fetus is 6 months old
• Unrelated persons of the same race have very little genetic similarity in their
fingerprints
• Parent and child have some similarity due to shared genes
• Siblings have more similarity
• The maximum genetic similarity observed is in identical twins
, Anatomy of skin
• Skin is one of the largest organs in the human body
• Typically, about 1.5 to 2 sq. metres in total surface area (adult)
• About 0.08 sq. metres is friction skin
• On most parts of the body, skin is no more than 2 mm thick, thickest in the area of the
palms
• Heels 4 mm, eyelids 0.5 mm
function of skin
1) Acts as a container for the skeletal structure and internal organs
2) Provides sensory input about external conditions such as heat and cold, wet and dry,
sharp and soft
3) Provides a means for the elimination of waste products such as salts, amino acids,
ammonia and urea by sweating (controls body temperature as well)
4) Allows for the ability to grasp surfaces firmly and grip objects
Anatomy of friction ridge skin
• Has two distinct layers, epidermis (top) and dermis (bottom)
• The bottom layer of the epidermis adjacent to the dermis is the generating layer where
new cells are formed
• Within the epidermis are several distinct layers
cross section of human skin
epidermis
• The outer layer of the skin
• A protective barrier for the underlying tissues
COMPLETE SOLUTIONS VERIFIED
fingerprint
An impression of the friction ridges of all or any part of the finger
SWGFAST
Scientific Working Group on Friction Ridge Analysis, Study, and Technology (now
known as Organization of Scientific Area Committees - OSAC)
palmer
bottom of hands
plantar
bottom of feet
theories of fingerprints
1. human friction ridge skin is unique
2. human friction ridge skin is persistent (permanent) throughout the individual's lifetime
fingerprint formation
• Fingerprints are fully formed by the time a fetus is 6 months old
• Unrelated persons of the same race have very little genetic similarity in their
fingerprints
• Parent and child have some similarity due to shared genes
• Siblings have more similarity
• The maximum genetic similarity observed is in identical twins
, Anatomy of skin
• Skin is one of the largest organs in the human body
• Typically, about 1.5 to 2 sq. metres in total surface area (adult)
• About 0.08 sq. metres is friction skin
• On most parts of the body, skin is no more than 2 mm thick, thickest in the area of the
palms
• Heels 4 mm, eyelids 0.5 mm
function of skin
1) Acts as a container for the skeletal structure and internal organs
2) Provides sensory input about external conditions such as heat and cold, wet and dry,
sharp and soft
3) Provides a means for the elimination of waste products such as salts, amino acids,
ammonia and urea by sweating (controls body temperature as well)
4) Allows for the ability to grasp surfaces firmly and grip objects
Anatomy of friction ridge skin
• Has two distinct layers, epidermis (top) and dermis (bottom)
• The bottom layer of the epidermis adjacent to the dermis is the generating layer where
new cells are formed
• Within the epidermis are several distinct layers
cross section of human skin
epidermis
• The outer layer of the skin
• A protective barrier for the underlying tissues
