Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Lesson OverviewLesson Overview32.3 Skin – 32.3 Skin –
The Integumentary SystemThe Integumentary System
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
THINK ABOUT IT
What’s the largest organ in your body? By far it is the skin.
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Integumentary System Functions
• Includes the skin, hair, and nails. • Skin has many functions: most important is protection.
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Protection
• skin forms a barrier that blocks diseases and debris
• prevents the body from drying out
• Protection from the sun
-Contains melatonin, a dark pigment that absorbs UV rays from the sun
• Nails protect the tips of fingers and toes-made from skin
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Body Temperature Regulation
• The skin releases extra heat made by working cells, while keeping in enough heat to maintain normal body temperature.
• Releases sweat on hot days to keep cool• Hair helps prevent heat loss from the head.
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Excretion
• A small amount of sweat is constantly released from your sweat glands. • Sweat contains waste products such as salts that need to be excreted from the
body.
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Information Gathering
• The skin is a gateway that sensations such as pressure, heat, cold, and pain are sent from the outside to the nervous system.
Lesson OverviewLesson Overview Skin - The Integumentary SystemSkin - The Integumentary System
Vitamin D Production
• Produces vitamin D • Produced from absorbing sunligh