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OTHER TISSUES AND
MOTOR UNIT
Lesson 5
OTHER TISSUES ASSOCIATED WITH
BONES, JOINTS AND MUSCLES…
Fascia
 another form of fibrous connective
tissue of the body that covers, connects, or
supports other tissues
 a band or sheet of connective tissue,
primarily collagen, beneath the skin that
attaches, stabilizes, encloses, and
separates muscles and other internal organ
FASCIA
OTHER TISSUES ASSOCIATED WITH
BONES, JOINTS AND MUSCLES…
Bursa
 fluid-filled, saclike that functions as a
gliding surface to reduce friction between
moving tissues of the body
 a saclike structure that contains bursa
fluid and protects muscle, tendon,
ligament, and other tissues as they cross
the bony prominences
NORMAL BURSA VS
INFLAMED BURSA
MOTOR UNIT
 A motor unit is defined as a motor nerve
and all the muscle fibers it supplies
 The structural parts of the motor unit are
the motor nerve and the muscle fiber
 All the motor units together are referred to
as the body’s neuromuscular system
MOTOR UNIT
 A nerve impulse travels from the spinal
cord (or brain) to a dendrite of a spinal
nerve, from the dendrite to the nerve’s cell
body, and from the cell body over the
nerve’s axon to the axon’s end brushes
(motor end plate), where a chemical is
released as the synapse
MOTOR UNIT
 As the impulse passes from nerve to
muscle, calcium is released from the
sarcoplasmic reticulum and transverse
tubules within the muscle fibers, two
structures closely allied with the actin and
myosin protein filaments
Thank you

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Lesson 6 (Other Tissues and Motor Unit).pptx

  • 1. OTHER TISSUES AND MOTOR UNIT Lesson 5
  • 2. OTHER TISSUES ASSOCIATED WITH BONES, JOINTS AND MUSCLES… Fascia  another form of fibrous connective tissue of the body that covers, connects, or supports other tissues  a band or sheet of connective tissue, primarily collagen, beneath the skin that attaches, stabilizes, encloses, and separates muscles and other internal organ
  • 4. OTHER TISSUES ASSOCIATED WITH BONES, JOINTS AND MUSCLES… Bursa  fluid-filled, saclike that functions as a gliding surface to reduce friction between moving tissues of the body  a saclike structure that contains bursa fluid and protects muscle, tendon, ligament, and other tissues as they cross the bony prominences
  • 5.
  • 7. MOTOR UNIT  A motor unit is defined as a motor nerve and all the muscle fibers it supplies  The structural parts of the motor unit are the motor nerve and the muscle fiber  All the motor units together are referred to as the body’s neuromuscular system
  • 8. MOTOR UNIT  A nerve impulse travels from the spinal cord (or brain) to a dendrite of a spinal nerve, from the dendrite to the nerve’s cell body, and from the cell body over the nerve’s axon to the axon’s end brushes (motor end plate), where a chemical is released as the synapse
  • 9.
  • 10. MOTOR UNIT  As the impulse passes from nerve to muscle, calcium is released from the sarcoplasmic reticulum and transverse tubules within the muscle fibers, two structures closely allied with the actin and myosin protein filaments
  • 11.
  • 12.

Editor's Notes

  1. The collagen fibers are oriented in a wavy pattern parallel to the direction of pull If ligaments join one bone to bone, tendons join muscle to bone, fascia surround muscles and other structures The fascia from one muscle then connects with the fascia from other muscles, and forms a network of connective tissue that integrates from the top of your head to the tips of your toes
  2. The fluid inside the bursa looks and feel the same as the egg white
  3. We have now observed the bones, the ligaments that connect the bones to form articulations, the muscles that cross joints and create movement, the nerves that innervate the muscles and the blood vessels that supply all the these structures.
  4. The calcium release causes the myosin cross bridges to wiggle or swivel in such a fusion that they contact the actin filaments surrounding them and cause the actin to move toward the center of the sacromere