1. Unit 3 Tissues, Membranes, and Integumentary System
Body Membranes
Unit 3 Tissues, Membranes, and Integumentary System

2. Body Membranes
Functions:
1. Line or cover body surfaces
2. Protect body surfaces
3. Lubricate body surfaces

3. Classification of Body Membranes
1. Epithelial Membranes
- Cutaneous Membranes
- Mucous Membrane
- Serous Membrane
2. Connective Tissue Membranes
-Synovial Membranes

4. Cutaneous Membranes Type of Epithelial Membrane Function: Protection
Location: Outermost Layer
Example: Skin
Stratified squamous epithelium with keratin
Has underlying dermis
Differs from other types of membranes because its dry!

5. Mucous Membranes Type of Epithelial Membrane
Function- absorption and secretion
Location- Lines body cavities that open to the exterior body
Examples- Nasal cavity, Mouth, Esophagus, Lungs and Bronchi
Either Stratified squamous or simple columnar epithelium
Moist/wet membrane

6. Serous Membranes Type of Epithelial Membrane
Function- Protection of internal organs
Location- Lines the body cavities that are CLOSED off to the exterior of the body
Examples- Parietal Peritoneum, Visceral Peritoneum
Single layer of simple squamous epithelium
Serous membranes occur in pairs
Visceral – covering of organs
Parietal – walls of organs
Both membranes secrete “serous Fluid” so that organs can move without friction

8. Synovial membrane Type of Connective tissue Membrane
Function- Reduce friction in joints
Line capsules that surround joints
Provide a smooth surface
Secrete “synovial fluid” to lubricate joint
Location- Between joints
Example- Bursa sac