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Published byHubert Stanley Ross
Modified over 5 years ago
Section 36-3: Integumentary System (Skin)* Includes skin, hair & nails * Skin = largest organ of human body
Functions of the Skin: 1. Regulate body temp. a. Blood vessels When hot, vessels dilate & release heat as blood flow increases
When cold, vessels constrict & heat is conservedb. Sweat – released by glands to cool body
2. Senses – sensory neuronsdetects hot/cold, pressure & environ. conditions 3. Vitamins – when exposed to UV light, makes vitamin D helps absorb calcium
4. Remove Wastes Sweat – releases excess water, salts & urea 5. Protection from… Physical & chemical damage Disease (1st line of defense)
3 Layers of Skin: Epidermis – outermost layer made of dead cells & constantly replaced a. Keratin – protein that… makes nails gives tough texture “waterproof” quality
b. Melanin – pigment that…colors the skin protects cells from sun damage more sun exposure makes more melanin
2. Dermis – inner, thicker portion of skinContains: Nerves Blood vessels Hair follicles (warmth & protects) Sweat glands Oil glands – soften skin
3. Subcutaneous Layer (Hypodermis)Mostly fat deposits Absorb impact Retain heat Store food
How Cuts Heal 1) Blood clots & cut closes 2) New cells push damaged cells to surface 3) Scab forms & WBC fight wound infection 4) New cells fill in gap of scab
Integumentary System Scratching the Surface. Our Largest Organ… Major functions include: –Protection – prevents chemical and physical injury –Sensory.
The Integumentary System. Integumentary System Hair Skin Nails.
The Integumentary System. The Skin The largest organ in the body – Covers the entire body Function: acts a a barrier against infection and injury, helps.
o Outer, thinnest layer. Outermost cells are dead and water repellent. o Are below epidermis thicker than epidermis and contain blood vessels. Nerves,
Integumentary System The Skin. 3 Main Layers of Tissue 1.Epidermis – outermost layer of the skin Made up of 5 smaller layers No blood vessels or nerve.
Fast Skin Facts The average adult has 21 square feet of skin (2 sq m) which weighs 7lb (3.2 kg) and has approximately 300 million skin cells. The average.
Nervous, Integumentary & Endocrine Systems Ch. 35-2, 35-3, 36-3, 39-1 & 39-2.
Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg
The Skin. Skin Made of three layers – epidermis – Dermis – hypodermis.
The Integumentary System. Skin The largest organ in your body Functions Covers the body and prevents water loss Protects the body from injury and infection.
The Integumentary System
Skin- Largest organ in the body Two layers of skin.
BIO 1004 Flora. Serves as a barrier against infection and injury, helps regulate body temperature, removes waste products, and provides protection from.
Integumentary System Chapter
Integumentary System Consists of Largest organ of the human body the
Integumentary System Composed of skin, hair, sweat glands, and nails The name is derived from the Latin integumentum, which means “a covering.”
Integumentary System. Integumentary system A barrier against infection and injury, helps regulate body temperature, removes wastes, provides protection.
33.3 Integumentary System KEY CONCEPT The integumentary system has many tissues that protect the body.
Integumentary System. A system composed of multiple types of tissue: –Epithelial tissue –Connective tissue –Muscle tissue –Nervous tissue Also includes,
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