Functions
What does keratin do?
provides a water resistance quality to the skin
Layer of skin composed on flat, scaly, epithelial cells
epidermis
Tattoo ink is absorbed into this layer
dermis
Wavy hair has this cross section
oval
only the epidermis is damaged with redness and swelling
first degree burns
What stops germs and bacteria from invading the body?
Langerhans' Cells
Layer of skin that contains blood vessels, hair, nerves, and glands
dermis
This type of sweat gland is found in your arm pits and groin area
apocrine
Part of nail responsible for growth?
Nail Matrix
What is the ABCD method of melanoma detection?
A = asymmetry
B = border
C = color
D = diameter
How does your body respond to cold temperatures?
dermal blood vessels constrict and pull the blood away from the skin
The dermis is made of this type of tissue.
dense irregular
How are freckles different than moles?
Moles have increased number melanocytes,
Freckles have melanocytes that overproduce melanin
Common name for a sebaceous gland
What is oil gland?
epidermis & upper region of dermis are affected. Redness, swelling, and blisters
second degree burn
What are the five functions of the integumentary system?
Protection, temperature regulation, sensory, excretion, vitamin D synthesis
This layer contains large blood vessels, perfect for hypodermic needles
hypodermis
What is the difference between thin and thick skin? (epidermis, dermis, hair, sweat glands)
Thin
Thick
These are the four accessory organs of the integumenary system
Sweat Glands, Sebaceous Glads, Hairs, Nails
Explain how wrinkles form
Number of cells that produce collagen (fibroblasts) decrease
Collagen matrix which ensures the structure and the firmness of the skin starts to fall apart.
What are three chemical barriers that the skin has to protect the body?
Type of tissues found in hypodermis
adipose and areolar
These four types of cells are found in the epidermis.
Why is apocrine sweat stinky?
Bacteria feed on this type of sweat because it contains lipids, and the biproduct contains a smell
Why do elderly people feel cold more often?
Decreased blood flow to heat sensory nerves in epidermis. Brain interprets temp as cold