Ex 14: Microscopic Anatomy

connective tissue ensheathing a bundle of muscle cells.

bundle of muscle cells.

contractile unit of muscle.

muscle cell

thin reticular connective tissue surrounding each muscle cell.

plasma membrane of muscle fiber.

a long filamentous organelle with a banded appearance found within muscle cells.

actin or myosin containing structure

cord of collagen fibers that attaches muscle to bone.

supporting and binding the muscle fibers, providing strength to the muscle as a whole and to provide a route for the entry and exit of nerves and blood vessels that serve the muscle fibers.

they can span rough bony prominences that would destroy the more delicate muscle tissues and because of their relatively small size, more tendons than muscles can pass over joints.

tendons are strong and cord-like and attach muscle to bone; aponeurosis are sheet-like and attach muscle to muscle.

Aponeuroses are thick membranes that separate muscles from one another. They are tough and resilient. Tendons are similar, in both function and composition, only they serve to connect muscles to bones. Both aponeuroses and tendons are capable of resisting considerable tension.

• 
• Sarcolema
• sarcomere>>>I Band( in this part there is also Zdisc)>>A Band(between the A Band there is the H zone and between that there is the M line)>>> I Band (in between the Z disc)

• Triad:
• Terminal Cisternae of the SR
• T Tubule
• Tubules of the SR
• Myofibrils
• Mitochondrion

• 
• Epimysium
• Endomysium
• Blood Cell
• Fascicle
• Perimysium
• Muscle Cell

the junction between a motor neuron's axon and the muscle cell membrane

a motor neuron and all of the the skeletal muscle cells it stimulates

the actual gap between the axon terminal and the muscle cell

within the axon terminal are many small vesicles containing a neurotransmitter substance

reaches the ends of the axon, the neurotransmitter is released and diffuses to the muscle cell membrane to combine with receptors there.

the greater influx of sodium ions results in permeability of the membrane

• 
• Myelinated
• Axon Terminal
• Muscle Fiber

• 
• Vesicle Containing ACh
• Mitochondrion
• Synaptic Cleft
• T Tubule

• 
• Nuclei of muscle fibers.
• Muscle fibers, longitudinal view.
• Muscle fibers, cross-sectional view.

• 
• Branch of an axon
• Axon terminal at neuromuscular junctions
• Muscle fibers

• 
• Epimysium
• Perimysium
• Endomysium (between individual muscle fibers)
• Muscle fiber in middle of a fascicle

bulk of body's muscle and it is attached to the skeleton (or associated connective tissue structures). Transport and insulation.

• 
• thick(myosin) filament
• Elastic (titin) filament
• Thin (actin) filament