HSCI 100 Lecture Notes - Lecture 7: Bone Marrow, Myocyte, Skeletal Muscle

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 100
• Professor: Nienke Van Houten

Document Summary

Both systems are involved with movement that allows us to respond to stimuli, digestion of food, return of blood to the heart and moving air in and out of the lungs. Both systems keep us upright and protect body parts. Bones store and release calcium need for muscle contraction, blood clotting and nerve impulse conduction. Muscle help maintain a constant body temperature. Smooth- involuntary muscle found around hollow organs and blood vessels. Cardiac- involuntary muscle found in the heart. Skeletal- voluntary muscle that is attached to the skeleton. Tendons- connective tissue that connects muscle to bone. Origin- attachment of a muscle to a stationary bone. Insertion- attachment of a muscle to a bone that moves. Atagonistic- muscles that work in opposite pairs (bicepts) Synergistic- muscle that work in groups for a common action. Note the only force muscle extort is pulling. Muscle fibers are arranged in bundles called fascicles.