Download Muscle and Nervous Tissue ppt

Muscle and Nervous Tissue
Muscle Tissue
• Muscle Tissue:
– Associated with the bones of the skeleton, the heart and
in the walls of the hollow organs of the body.
• Muscle Tissue Functions:
–
–
–
–
–
Movement
Maintains posture
Produces heat
Pumps blood
Peristalsis
3 major types
• Skeletal
• Smooth
• Cardiac
Skeletal Muscle Tissue
1. Skeletal muscle is attached to bone and can be
controlled by conscious effort (voluntary).
2. The cells (muscle fibers) are long and
cylindrical, striated, have many nuclei and contract
from nervous impulse.
Smooth Muscle Tissue
1. Lacks striations, is uninucleate, and consists of
spindle-shaped cells.
2. Involuntary muscle
3. found in the walls of internal organs, and in the
digestive tract, blood vessels, and urinary bladder.
Cardiac Muscle Tissue
1. Found only in the heart and consists of
branching fibers that are connected to each other
with intercalated disks.
2. This involuntary muscle has a single nucleus in
each cell but appears striated.
Muscle Tissue Types
Muscle Tissue Types
Nervous Tissue
• Nervous Tissue:
– Main component of the nervous system,
ie., brain, spinal cord & nerves.
• Nervous Tissue Functions:
– Regulates & controls body functions
– Generates & transmits nerve impulses
– Supports, insulates and protects impulse
generating neurons.
Nervous Tissue
Types of Nervous tissue cells:
• Neurons- largest cells, transmit impulses
• Neuroglial cells- smaller, more abundant and
act as support for neurons