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B7 (Blood contains platelets which help clot wounds, Fitness practitioners…
B7
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Fitness practitioners need to know information such as any health problems, current medication, previous fitness treatments, other lifestyle factors, family medical history or physical activity.
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Blood contains plasma which carries nutrients, antibodies, hormones and waste.
Valves prevent backflow of blood, two coronary arteries give heart muscle cells blood and left ventricle wall is thicker than right as it pumps blood all around body. Atria have thinner walls as only pump blood to ventricle.
Right atrium gets deoxygenated blood from body through vena cava, which goes to right ventricle to pump to lungs through pulmonary artery.
We have a double circulatory system with a circuit that pumps deoxygenated blood to the lungs and back to the heart. The second circuit pumps oxygenated blood to the body where it gives up oxygen at body cells and returns deoxygenated blood to the heart.
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Left atrium gets oxygenated blood from lungs through pulmonary vein, which then goes to left ventricle to pump to whole body through the aorta.
Blood contains red blood cells, which take oxygen from the lungs to the body, they hold haemoglobin which binds to oxygen and have a biconcave shape so a large surface area.
Muscles contract when proteins in their cells react together. This pulls the two ends of the muscle closer together. Muscles can relax, which allows them to be pulled longer.
Waste diffuses into tissue fluid, then into capillaries.
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A skeleton is needed for support, movement and protection of vital organs.
Muscles move bones at a joint by contracting and tendons can't stretch so when muscles contract, then tendon pulls on the bone and transmists a force from the muscle to the bone.
Ligaments hold bones together and have a high tensile strength and are elastic so they can stabalise joints and allow movement.
When blood goes through capillary beds, small molecules are forced out of capillariesto make tissue fluid. Substances diffuse out of tissue fluid into the cells.
When the bicep contracts, the tricep relaxes. When the tricep contracts, the bicep relaxes.
Tendons attach muscles to bones, can withstand tension.
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Some animals are vertebrates such as fish and birds (endoskeleton), but some have outside skeletons such as insects (exoskeleton).
Exercise increases fitness and should be done in a structured way, e.g. a regime.
The time it takes for them to return to resting level after exercise is the recovery period, a shorter recovery
Heart rate/blood pressure resting level is when you aren't exercising. When you exercise they will increase.