Download Muscle and Nervous tissue

MUSCLE AND
NERVOUS TISSUE
SECTION 5.4-5.5
OBJECTIVES
• To explain the different types of muscle
tissue, function and location
• To explain the function and location of
nervous tissue
MUSCLE TISSUE
• Locations:
• Bones of skeleton
• Heart
• Walls of hollow organs
MUSCLE TISSUE (CONT.)
• Functions:
• Movement (through contraction of
muscle fibers)
• Locomotion
• Maintains posture
• Produces heat
• Facial expressions
• Pumps blood
• Peristalsis
MUSCLE TISSUE (CONT.)
1. Skeletal
2. Cardiac
3. Smooth
SKELETAL MUSCLE
• Locations:
• Attach to bones
• Functions:
• Controlled by conscious effort
• Voluntary
• Characteristics:
• Alternating light and dark strands
(striations)
• Multiple nuclei
• Fibers contract then relax
CARDIAC MUSCLE
Intercalated Disc
• Locations:
• Only in the heart
• Functions:
• Controlled by unconscious
effort
• Involuntary
• Characteristics:
• Striated, branched cells
• Single nucleus
• Cells joined end to end –
intercalated disc
Nucleus
SMOOTH MUSCLE
• Locations:
• 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
NERVOUS TISSUE
• Location:
• 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
NERVOUS TISSUE (CONT.)
• Basic cells- neurons
• 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