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Functional anatomy

TermDefinition
Muscle belly Main body of the muscle, contains thousands of fibres all held together by a layer of connective tissue called the Epimysium
Epimysium The connective tissue that surrounds the muscle belly
Endomysium Another type of connective tissue, this layer surrounds each fasicle
Fasicle A bundle of muscle fibres surrounded by the Perimysium
Perimysium The innermost connective tissue that surrounds each muscle fibre
Muscle fibres A strand of muscle that contains myofibril and is surrounded by the endomysium
Myofibril Contains both myosin and actin (sarcomeres)
Dendrite Recieves infromation from the central nervous system, Sends the information to the cell body
Cell body Directs the activity of the neuron, Passes the stimulus collected by the dendrites to the axon
Axon Transmits the stimulus from the cell body to the axon terminals/ muscle fibres
Axon terminals The branches that directly innervate the muscle fibres to send the stimulus
Myelin An insulated covering on the axon that helps increase the speed at which the stimuli travel along the axon
Sensory neuron Sends the stimulus collected from the receptors and sends it to the brain (central nervous system)
Brain Interprets the stimulus and sends the impulse for the correct movement to occur
Spinal cord Sends the impulse to the correct motor neuron, Can also return motor commands to the body (stimulus)
Motor neuron Transmits impulses from the cell body to the relevent muscle fibres
Motor unit Made up of a motor neuron and the muscle fibre it innervates , Produces the movement that the brain had sent
Created by: Ry;leigh
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