Group Task 2 n n Produce two revision

Group Task 2 n n Produce two revision clips or the following events: The mechanisms of breathing and the cardiac conduction system Both clips must be as practical as possible and include all stages and key words. You have 35 minutes to complete this task The video clips will be played back to the class at the end of the session

Shoulder and elbow action in a throw

Explain the mechanics of breathing which allow a performer to fill the lungs with air during exercise. n A. Diaphragm/intercostal muscles contract/ flattens; n B. Lungs/ribs also pulled upwards and outwards; n C. Lungs attached to pleural membranes; n D. Volume/size of chest/thoracic cavity/lungs increases; n E. Reducing pressure within lungs; n F. Air sucked in; n G. During exercise other muscles – strernocleidomastoid / scalenes and n pectoralis minor increase action; AS Module 1 B. 3

Describe how the sinoatrial node (SAN) and the atrioventricular node (AVN) control the increase in heart rate during exercise. (6 marks) n n n n n 1 SAN initiates heart beat/sends impulses; 2 intrinsic/myogenic/pacemaker; 3 spread of impulses through atria; 4 atria contracts/systole; 5 role of valves as non-conducting material; 6 impulse reaches AVN; 7 initiation of impulse down interventricular septum/reduced delay of spread of impulses; 8 Bundle of His; 9 Purkinje fibres conducting impulses; 10 ventricular systole/contraction; 11 period of diastole/relaxation for filling;