Transcript INTEGUMENTARY SYSTEM

STARTER #3
1. Label the cavities to the
right
a.
b.
c.
d.
2. What type of tissue lines
organs and cavities?
3. What type of tissue is this?
INTEGUMENTARY
SYSTEM
PP 924-926
PARTS OF
INTEGUMENTARY
• Skin
• Nails
• Hair
SKIN FUNCTION
•
Barrier against mechanical and
chemical injury
•
Protection of microbial invasion
•
Prevention of dehydration
•
Regulation of body temperature
•
Sensory
•
Vitamin (D) synthesis
SKIN LAYERS
Epidermis- outermost layer of skin
• Contain melanocytes
• make melanin (gives pigment and protection from
UV light)
SKIN LAYERS
Dermis-inner layer of skin
• composed of blood vessels, nerves, hair
follicles, glands
SKIN LAYERS
• Glands
• Oil glands attached to hair follicles
• Secrete sebum (oils)
• Sweat glands regulate body temperature
• Subcutaneous: fat cells (insulation)
SKIN CANCER
• Most common in the U.S.
• Can affect skin cells or
melanocytes (worst type)
• People of light skin tone,
blue eyes, and red hair
are most at risk
NAILS
•
•
Protect ends of toes and fingers
Made of keratin
HAIR
• Protect and insulates the body
• Produced by hair follicles
• Made of keratin