Integumentary system

Question 1

What are the 4 functions of the skin and describe them

Answer 1

1.Defense: Protects underlying tissues and structures from injury, UV radiation, temperature, and invading micro organsims
2.Thermoregulation: Helps regulate the bodies temperature by both preventing and facilitating heat loss
3.Water loss: Prevents excessive water loss which helps maintain internal chemical balance
4.Sensation: sensory nerves relay information about the external enviroment to the brain like touch, temperature, pain, pressure, texture.. ect

Question 2

What is the outermost layer of the skin called and what are they layers called

Answer 2

The epidermis is the outer most layer and the first layer of protection for the body
Consists of 5 levels:
1.Stratum corneum (outermost)
2.stratum lucidum
3.stratum granulosum
4.stratum spinosum
5.stratum basal (innermost)

Question 3

What layer can melanin be found

Answer 3

The stratum basal

Question 4

What layer can melanin be found

Answer 4

The stratum basal

Question 5

what is desquamation

Answer 5

The process of constant shedding and replacing of the stratum corneum

Question 6

What is the second layer of the skin and describe it

Answer 6

Dermis
a fibrous tough and highly elastic layer made up of connective tissue

Question 7

What is found in the connective tissue layer of the dermis and what do they do?

Answer 7

• Collagen fibers: fibrous protein that provides the skin with its resistance to breakage
• Elastin fibers: provide the skin with its elastic properties
• Mucopolusaccharide gel: provides the skin with resistance to compression

Question 8

Where are nerve endings and blood vessels found in the skin

Answer 8

In the dermis

Question 9

What do cutaneous blood vessels do?

Answer 9

• Help regulate body temperature by controlling blood volume to the skin

Question 10

What are the exocrine glands in the skind and where are they found

Answer 10

The sweat glands and sebacous glands
The sweat glands produce sweat and discharge. Evaportaion of the h20 from the sweat is 1 major way of thermoregulation
Sebacous glands produce oily substances at the base of the hair follicle

Question 11

What layer are hair follicles found in

Answer 11

the dermis

Question 12

What is below the epidermis and dermis and what is it made of and its function

Answer 12

The subcutaneous layer:
Made up of Adipose tissue
Provides insulation from extreme temperatures
Is an energy source and a cushion for the body