Do Now: Tuesday, Sept. 15
• Objective: Integumentary Overview
• Do Now:
1. What is homeostasis and why do we need it?
2. Positive or negative feedback?
a) More common?
b) Change is good and want to increase it?
c) Thermoregulation as an example?
Integumentary System
• Definition: External covering of the body,
including skin, hair, nails and sweat glands.
Purposes of Skin
1. Protective covering
2. Regulate body temperature
3. Prevent water loss
4. Hold sensory receptors
5. Synthesize (make) biochemicals (vitamin D)
Four Types of Membranes:
•
•
•
•
Serous
Mucous
Synovial
Cutaneous
Four Types of Membranes:
• 1. Serous: lines cavities not open to surface
(thorax (chest), abdomen)
Four Types of Membranes:
2. Mucous: line cavities open to surface (nasal,
oral, digestive, urinary, reproductive)
Four Types of Membranes:
• 3. Synovial: line joints (makes fluids that
protect joints)
Four Types of Membranes:
• 4. Cutaneous: protection (skin)
CFU:
• Please identify what type of membrane I
would use for each of these purposes:
1. Keep my joints from grinding into each other.
2. Protect my body from bacteria entering
through the nose.
3. Keep my lungs from jamming into my ribs
4. Keep out bacteria from entering through the
surface of the skin.
Layers of Cutaneous Membrane
• 1. Epidermis: (top) many layers of flat cells
– Protection
• 2. Dermis: hair, sweat glands, nails, oil glands
– Largest layer
• 3. Hypodermis: (bottom) largely fat
– Insulation, holds major blood vessels.
Layers of Cutaneous Membrane
Class you need to know this
GP: Types of Membranes
Serous
What does
it do?
Where is it
found?
Mucous
Synovial
Cutaneous
GP: Layers
Epidermis
Layer: Top,
Middle or
Bottom?
What’s it
made of?
Why is it
important?
Dermis
Hypodermis
Independent Practice:
Whiteboards
Types of Membranes
Layers of Cutaneous Membrane
•
•
•
•
• 1) Epidermis
• 2) Dermis
• 3) Hypodermis
1) Serous
2) Mucous
3) Synovial
4) Cutaneous