1. Connective, Muscular, & Nervous Tissue

2. Connective Tissue Factuals
Connects body parts
Found EVERYWHERE in the body
Most abundant and widely distributed tissue.

3. Characteristics Most is well vascularized (Has a good blood supply)
Exception: Tendons, ligaments, & cartilage have a poor blood supply and take longer to heal.

4. Characteristics
Have an extracellular matrix which can be liquid, semi-solid, gel-like, or very hard. Allows the tissue to withstand extra weight, stretching, etc.
Ex. Soft Matrix: Fat tissue, Hard Matrix: Bone

5. Types of Connective Tissue
Bone
Cartilage
Dense Connective Tissue
Loose Connective Tissue
Blood

6. Bone Called osseous tissue.
Has exceptional ability to protect and support.

7. Cartilage Less hard/flexible than bone. Hyaline Most abundant
Glassy/blue-white appearance
Forms larynx (voicebox), attaches ribs to breastbone, & covers ends of bones where joints form.

8. Cartilage 2. Elastic: Supports the external ear.
3. Fibrocartilage: Forms cushion-like disks between the vertebrae of spinal column.

9. Dense Connective Tissue
Forms tendons & ligaments.
Tendons: Connect muscle to bone.
Ligaments: Connect bone to bone where joints form.
Ligaments are more stretchy than tendons.

10. Loose Connective Tissue
1. Areolar Tissue:
Cushions and protects body organs.
Helps hold internal organs together and keeps them in place.
Holds water/salts.
When a body region is inflamed, areolar tissue soaks up the excess fluid and causes swelling known as edema.

11. Loose Connective Tissue
2. Adipose Tissue:
Fat
Insulates the body and protects it from extreme temps.
Surrounds organs (kidneys) and cushions eyeballs in sockets.
Also stored as reserve in hips and breasts.

12. Loose Connective Tissue
3. Reticular Tissue:
Found in lymph nodes, spleen, & bone marrow.

13. Blood Consists of blood cells and surrounded by plasma.
Blood fibers are only seen when blood clots

14. Muscle Tissue

15. Muscle Tissue
Highly specialized to contract/shorten to produce movement.
3 Types:
Skeletal
Cardiac
Smooth

16. Skeletal muscle Attached to the skeleton Can be controlled voluntarily
Causes gross body movements
Cells of muscle tissue are long, cylindrical, have many nuclei, and are striated (striped).

17. Cardiac Muscle Found only in the heart. Is striated
Cells fit tight together at junctions called intercalated disks. Intercalated disks contain gap junctions that allow impulses to travel.
Involuntary control.

18. Smooth muscle No visible striations.
Cells have a single nucleus and are spindle shaped.
Found in walls of hollow organs (stomach, bladder, uterus)
Can contract (making organ smaller) or enlarge (making organ dilate) to move substances along.
Peristalsis: moving food through the esophagus.

19. Nervous Tissue

20. Nervous tissue Found in the brain, spinal cord, & nerves
Specialized to react to stimuli and conduct impulses.
Made up of cells called neurons.

22. Tissue repair Tissues repair themselves in 2 major ways.
Regeneration: the replacement of destroyed tissue by the same kind of cells.
Fibrosis: involves repair by dense connective tissue forming scar tissue.
The type of repair chosen depends on the type of tissue damaged and the severity of the injury.
Clean cuts heal much more easily and quickly than rips or tears.