1. Muscle and Nervous tissue
Section

2. Objectives
To explain the different types of muscle tissue, function and location
To explain the function and location of nervous tissue

3. Muscle tissue Locations: Bones of skeleton Heart
Walls of hollow organs

4. Muscle tissue (cont.) Functions:
Movement (through contraction of muscle fibers)
Locomotion
Maintains posture
Produces heat
Facial expressions
Pumps blood
Peristalsis

5. Muscle tissue (cont.)
1. Skeletal
2. Cardiac
3. Smooth

6. Skeletal muscle Locations: Functions: Characteristics: Attach to bones
Controlled by conscious effort
Voluntary
Characteristics:
Alternating light and dark strands (striations)
Multiple nuclei
Fibers contract then relax

7. Cardiac muscle Locations: Functions: Characteristics:
Intercalated Disc
Nucleus
Locations:
Only in the heart
Functions:
Controlled by unconscious effort
Involuntary
Characteristics:
Striated, branched cells
Single nucleus
Cells joined end to end – intercalated disc

8. Smooth Muscle Locations: Functions: Characteristics:
Wall of hollow organs
Ex: stomach, intestine, bladder, uterus, blood vessels etc.
Functions:
Controlled by unconscious effort
Involuntary
Characteristics:
Shorter
Spindle-shaped
Single nucleus
*no striations

9. Nervous tissue Location: Functions: Brain Spinal cord
Peripheral nerves
(*main component of nervous system)
Functions:
Regulates and controls body functions
Generates and transmits nerve impulses
Supports, insulates and protects impulse generating neurons

10. Nervous Tissue (cont.) Basic cells- neurons Neuroglial cells
Sense changes through dendrites
Transmit impulses via axon to other neurons, glands, or muscles, coordinate and regulate
Neuroglial cells
Support and bind
Phagocytosis
Supply nutrients