1. Muscle and Nervous Tissues
Human Anatomy & Physiology
Muscle and Nervous Tissues

2. Muscle Tissue Specialized to contract and produce movement
Because the cells are elongated to produce maximum contractions, they are called muscle fibers
Three types
Skeletal muscle
Cardiac muscle
Smooth muscle

3. Muscle Tissue Types Skeletal muscle Voluntarily controlled
Connected to bones with dense connective tissues
Cells are organized in layers and have internal, overlapping fibers called striations
Cells have more than one nucleus
Function: movement

4. Muscle Tissue Types Cardiac muscle No control = involuntary
Found only in the heart
Cells have striations
Cells attached to other cardiac muscle cells at intercalated disks
One nucleus per cell
Function: to pump blood

5. Muscle Tissue Types Smooth muscle Involuntary control
Makes up the walls of hollow organs
No visible striations
One nucleus per cell
Function: Motility; peristalsis

6. Nervous Tissue Neurons and nerve support cells
Irregularly shaped cells with long branches for communication
Function: sends impulses from the CNS to other areas of the body and back

7. Tissue Repair and can heal, but there are exceptions.
● Most connective tissues are well vascularized
and can heal, but there are exceptions.
● Tendons and ligaments have a poor blood
supply, and cartilages are avascular. As a
result, they heal very slowly when injured.
Tissues that are replaced largely with scar tissue and are never “as good as new”:
Cardiac muscle
Nervous tissue within the brain and spinal cord