cardiovascular system

• what are the cardiovascular system 2 main functions?

  transporting substance and temperature control
• temperature control- moving the blood closed to the skin cools the body more quickly
• transporting things- in the bloodstream oxygen, carbon dioxide and nutrients are transported
• cardiac output= heart rate x stroke volume
• respiratory system= trachea -> bronchi -> bronchioles -> alveoli
• when you breathe in the diaphragm contract to move the ribcage upwards and expand the chest cavity. this draws air into your lungs
• when you breathe out the diaphragm relax moving the ribcage down shrinking the chest cavity. this forces the air back out
• carbon dioxide diffuses from the capillary into the alveolus and is then exhaled
• oxygen diffuses from the alveolus into the capillary blood
• aerobic exercise- glucose + oxygen -> carbon dioxide + water
• aerobic exercise is with oxygen which happens when the exercise is not too fast so the body can keep up with the oxygen demand
• anaerobic exercise- glucose -> lactic acid
• anaerobic exercise is without oxygen which happens when the exercise is short and high intensity so the body can't handle the oxygen demand as fast as the cells need it
• the vena cava is on the right side of the heart and carries deoxygenated blood to the right atrium
• the deoxygenated blood travels through the vena cava into the right atrium, through the right ventricle and to the pulmonary artery to the lungs
• oxygenated blood travels through the pulmonary vein to the left atrium, through the left ventricle into the aorta out to the rest of the body