B1 - different types of muscle

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• skeletal muscle (voluntary) • cardiac muscle • smooth muscle (involuntary)

• muscle tissue in which the contractile fibres in the cells are aligned in parallel bundles. so that their different regions form stripes visible in a microscope • muscles of this type are attached to the skeleton by tendons and are under voluntary control

• voluntary muscle • ‘striated’ or ‘striped’ muscle • these muscles are controlled by us • they are essential for any form of movement (critical for sport and exercise) • attached to the skeletal system via tendons and through contractions and pulling motions creates movement • skeletal muscles can become fatigued during the exercise

• only found in the wall of your heart • this works continuously until you die • it is involuntary meaning you don’t consciously control it • it is composed of a special type of striated tissue that has its own blood supply • it’s contractions help to force blood through the heart and blood vessels to different parts of the body • each contraction and relaxation of the heart muscle counts as 1 heart beat • cardiac muscle never fatigues

• an involuntary muscle that works without conscious thoughts • this works under the control of the nervous system • it is located in the walls of the digestive system and bloods vessels • helps to regulate blood pressure and digestion

• the network of nerve cells and fibres which transmits nerve impulses between parts of the body