1. Muscle and Nervous Tissue
Section

2. Objectives
explain the various types of muscle tissue, their functions, and locations
Identify the location of nervous tissue and explain its function

3. Muscle Tissue: Locations
Attached to bones of skeleton
Walls of hollow organs and blood vessels
Heart

4. Muscle Tissue: Functions
Moves body parts
By contracting muscle fibers
Maintains posture
Produces heat
Pumps blood
Make facial expressions
Moves food through digestive tract
Ex: Peristalsis

5. 3 types of muscle tissue
1. Skeletal
2. Smooth
3. Cardiac

6. Skeletal Muscle Location: Functions: Characteristics:
Attach to the bones (“meat”)
Functions:
Generate heat
Voluntary movement
Controlled by conscious effort
Characteristics:
Long, alternating light and dark strands with striations
Fibers contract and relax to produce movement
Many nuclei
Highly vascularized

7. Smooth Muscle Location: Functions: Characteristics:
Wall of hollow organs
Ex: digestive tract, urinary bladder, uterus, etc.
Walls of blood vessels
Functions:
Move materials through the organ
Involuntary
Controlled by unconscious effort
Characteristics:
Short, spindle-shaped cells
Single nucleus
No striations!!

8. Cardiac Muscle Locations: Heart Only Functions:
Moves blood through the heart and the rest of the body
Involuntary
Controlled by unconscious effort
Characteristics:
Long, striated, branched cells
Single nucleus
Cells are connected by intercalated discs (help join cells and help fibers to contract)

9. Nervous Tissue Location: Functions:
Main components of the nervous system
Brain
Spinal cord
Peripheral nerves
Functions:
Conduct nerve impulses to relay information
Regulates and controls body functions
Supports, insulates, and protects nerve cells

10. Nervous Tissue Basic cells = Neurons Neuroglial Cells:
Sense changes by dendrites
Transmit signals via axon to other cells (muscles, neurons, glands, etc)
Neuroglial Cells:
Support and bind
Conduct Phagocytosis
Supply nutrients to nervous tissue
Repair and maintain nervous tissue

11. Activity!! Identify the tissues and the characteristics!

12. C B A

13. A B C D E

14. A B C

15. A