1. Lecture 4.5: Tissues

2. Mucous Membranes Line cavities that communicate with the exterior
Surface moist all of the time

3. Figure 4.12a

4. Serous Membranes Sealed, internal divisions of ventral cavity
Pleura—covers lungs
Peritoneum—lines abdominal cavity (covers organs like spleen and stomach)
Pericardium—covers heart
Parietal portion—lines inner surface of cavity
Visceral portion—covers organs within cavity
Minimize friction

5. Figure 4.12b

6. Cutaneous Membrane AKA: Skin
Stratified squamous epithelium and dense connective tissue
Thick, waterproof, dry

7. Figure 4.12c

8. Synovial Membrane Articulations (Joints)—where bones meet
Line bones at freely moving joints
Produce synovial fluid
Lubricates joint
Permits smooth movement

9. Figure 4.12d

10. Muscle Tissue Types Skeletal Muscle Made up of skeletal fibers
Striations—striped pattern
Multinucleated
Contract only when stimulated
Voluntary

11. Figure 4.13a

12. Muscle Tissue cont… Cardiac Muscle Only in heart Striated One nucleus
Intercalated discs—connect cells
Pacemaker cells—set up regular rate of contraction
Involuntary

13. Figure 4.13b

14. Muscle Tissue cont… Smooth Muscle In hollow organs 1 nucleus
No striations
Involuntary

15. Figure 4.13c

16. Neural Tissue Mostly in brain and spinal cord Neurons—nerve cells
Neuroglia—supporting cells

17. Figure 4.14a