The Senses

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What 2 layers make up skin?
- Epidermis
- Dermis
What three layers make up the epidermis?
- Cornified layer
- Granular layer
- Malpighian layer
What is the Cornified layer?
- Top layer of epidermis
- Consists of dead cells
- Full of keratin
- (Waterproof layer)
What is the granular layer?
- Layer between Cornified and Malpighian layers.
- Consists of living cells
What is the malpighian layer?
- Below granular layer
- Consists of cells continuously dividing by mitosis and many pigment (melanin) cells, which protect the skin from UV radiation.
What does the dermis layer consist of?
- Connective tissue (has collagen)
- Blood vessels
- Sweat glands
- Hairs
- Sebaceous glands (sebum)
- Nerve receptors
What does the connective tissue in the dermis layer of skin contain?

Contains cells with a strengthening protein called collagen.
What is the layer called that contains fat in adipose tissue?

Subcutaneous layer
What does the subcutaneous layer contain?

Contains fat in adipose tissue.
What are the functions of Skin? (5)
- Protection
- Vitamin production
- Food store
- Sense organ
- Excretion
How does skin perform the function of protection?
- Epidermis protects against damage, water loss and the entry of pathogens.
- Melanin protects against UV radiation
- Sebum (oil) keeps the epidermis intact
What does the epidermis protect against?
- Damage
- Water loss
- Entry of pathogens
What does sebum oil do?

Keeps the epidermis intact.
What vitamin is made in skin?

Vit D
What does the skin store?

Food store- fat stored energy
What does skin sense?

Touch and temperature
How does the skin perform it’s role of excretion?

Sweat removes water and salts from the body.

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jacquelineglynn

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The Senses

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2023-06-04T11:33:09Z