Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
what are 4 structures of the Integumentary system?
|
1 Skin 2Hair 3Nails 4Glands
|
|
|
What are the 4 functions of the Integumentary system?
|
1protects body from infection2regulates body temp3removes wastes4)Detects Sensation.
|
|
|
What are the 3 layers of the skin?
|
1)Epidermis
2)Dermis 3)Hypodermis |
|
|
Epidermis is.....
|
The outermost layer of skin.
contains no blood vessel. composed of Dead and living cells. |
|
|
Outside layers
|
Flattened dead so become flat and their organelles disintegrate and cannot support anymore. Cells are too far away from blood vessels and do not receive adequate nutrition.
|
|
|
Keratin
|
Tough fibrous protein waterproof
|
|
|
Epidermis inside layers
|
Alive undergo rapid cell division called mitosis new cells are pushed to surface a new epidermis forms every 4 to 5 weeks.
|
|
|
What is the function of melanocytes?
|
It produces melanin. absorbs UV rays
|
|
|
Dermis
|
It lies beneath the epidermis its contains Collagen fibers. Blood vessels nerve ending glands sensory receptors smooth muscles hair follicles.
|
|
|
What is the function of the dermis?
|
Regulates body temperature when body is cold blood vessels constrict it limits heat loss goosebumps trap in heat when body is warm blood vessels dilate increasing heat loss produce and release flat helps cool body gets rid of waste.
|
|
|
What are the two major types of glands in the dermis?
|
Sweat glands oil glands.
Oil glands produce a sub stance called sebium. It keeps skin and hair moisturizer waterproof and flexible. |
|
|
What are the four functions of the hypodermis?
|
Majority is made of fat anchors skin to muscle protects underlying organs part of body that thickens when one gains weight.
|
|
|
What is the cause of skin cancer?
|
Abnormal growth of cells in skin can be caused by excessive exposure to UV light.
|
|
|
What is the basic structure of hair and nails called?
|
Keratin
|
|
|
What is the purpose of having hair on your head?
|
Protects head from UV rays keeps heat in.
|
|
|
Why do we have hair?
|
Prevents dirt from entering the body.
|
|
|
The three structures of hair?
|
Cortex medulla and cuticle.
|
|
|
What is the hair follicle?
|
A tube-like pockets of epidermal cells that extend into the dermis it produces hair cebaceous glands are close to the hair follicle
|
|
|
Hair color
|
Call by production of melanin melanin production decreases with age.
|
|
|
Arrector pili muscle
|
Muscle that connects to every hair follicle it contracts and pulls hair up causing goosebumps.
|
|
|
Nail root
|
Areaware nails girl from grow at an average rate of 3 millimeters per month fingernails grow about 4 times faster than toenails.
|
