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Year 10 PASS Muscular System
Transcript of Year 10 PASS Muscular System
Postural muscles are also of vital importance to sporting performance. They may work to keep one part of the body still while another part is moving e.g. the postural muscles of the back and stomach keep the body still and straight during a push up. They may also contract to stabilise joints and to help absorb force, such as playing football. Where are your quadriceps? Label them on your muscle diagram (Hint- they have been labeled with the other name they are known as)
Where are your hamstrings? Label them on your muscle diagram (Hint- they have been labeled with the other name they are known as) Structure and Function of the Muscular System Identify which definition is for skeletal, cardiac and smooth muscle.
Found only within the heart. Cardiac muscle contracts and relaxes causing the heart to beat. Cardiac muscle is involuntary (not under conscious control). Example-heart
Is known as voluntary muscle and is anchored by tendons to bone. It is used to affect skeletal movement such as walking and in maintaining posture. Example- deltoid
Found within the walls of organs and structures of the body. Smooth muscle is also involuntary. Example- intestines Basic contribution of efficient movement Skeletal muscles operate to produce movement. Muscles are attached to bones by tendons. By pulling on the bone they are attached to, muscles produce movement. Muscles can only pull a bone, they cannot push.
Muscles are arranged in pairs, so that if one muscle moves a body part in one direction, another can move it back. Looking at the elbow joint as an example, the pair of muscles are the biceps and triceps. The bicep is positioned on the front, and the tricep on the back of the upper arm. The two muscles work as a pair, so that when the bicep is contracting to cause the elbow to flex, the tricep is relaxing. In this example the bicep is known as the agonist and the tricep is the antagonist.
Agonist- the muscle that is causing the movement
Antagonist – the muscle that relaxes to allow movement to occur. Practical Activity
Perform each of the following actions and state the agonist and antagonist muscles. It helps to feel and observe the muscle!
From a sitting position, extend one leg
Perform the downward movement of a squat
Perform the upward stage of a push up
Perform the upward stage of a sit up