09. AT #2 Integumentary system Flashcards
What is this layer called?
Epidermis
Describe the structure of the epidermis
The superficial layer of skin.
No blood vessels or nerve endings.
Melanocytes found in this layer.
List the functions of the integumentary system
To provide PROTECTION
To ABSORB chemicals
To receive SENSORY information
To regulate body TEMPERATURE
To EXCRETE substances
Formation of Vitamin D
What is this layer called?
Dermis
What is this layer called?
Hypodermis/subcutaneous
What are the receptors that are sensitive to touch?
Mechanoreceptors
What are the receptors that are sensitive to pressure?
Mechanoreceptors
What are the receptors that are sensitive to temperature?
Thermoreceptors
What are the receptors that are sensitive to temperature?
Thermoreceptors
What are the receptors that are sensitive to pain?
nociceptors
What is this?
Capillaries
What is this?
Arrector pili muscle
What is this?
arrector pili muscle
What is this?
Sebaceous gland
What is this?
Sudoriferous gland
Describe the structure of the dermis
Contains collagen & connective tissue interlaced with elastic fibres.
Blood vessels, sensory nerve endings, sweat glands & ducts, sebaceous glands, hair and arrector pili muscles present.
Describe the structure of the subcutaneous layer
adipose (fat tissue) and areolar tissues (collagen cells)
How does the integumentary system help cool the body
- vasodilation to skin to increase heat loss via radiation
- sweat to increase heat loss via evaporation
How does the integumentary system help increase body temperature
- vasoconstriction to skin to decrease heat loss via radiation
- arrector pili muscles pull hairs up to “trap” air and decrease heat loss due to radiation
What does a sebaceous gland secrete?
sebum (oil)
what does a sudoriferous gland secrete?
sweat
An Apocrine sudoriferous gland is open to…
a hair follicle
An Eccrine sudoriferous gland is open to…
the skin
