Anatomy and physiology of muscle growth

•Bundles of fibers surrounded by a thin layer of connective tissue: Sarcolemma.
•Hooked to the bony plates of the skeleton by strong tendons.
•Receiving stimuli from nerves originating from the anterior horns of the spinal cord.
•Each fiber being a multinucleated cell consists of myofibrils in bundles with a large number of mitochondria and a myoglobin (pigmented protein).
•Muscles represent 50% of the weight of the adult human 20% of that weight is Protein and  remaining parts are salts and water.
•Autonomic nervous system control smooth and cardiac muscles.
•Central nervous system controls the voluntary muscles

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