L1 Flashcards
what kind of blood enters which side of the heart
Oxygenatated (left) deoxygenated (right)
What kind of muscle is the heart made of
Myocardium (cardiac)
What stops the heart from over filling
Inelastic pericardial membranes
Why would the valves open/close
Open:pressure of blood behind is treated than Infront
Closed: pressure of blood Infront is greater than behind
What is the right av separated by
Tricuspid vavlve
What is the left av separated by
Bicuspid valve
What do the coronary arteries do
Heart requires blood supply for aerobic respiration from surface arteries because the heart is constantly contracting/relaxing
What does build up in Coronary arteries lead to
Angina(heart attack)
What is the renal artery
Blood from sorts goes to kidney enters via renal artery and after O2 diffuses out blood leaves Vis renal vein
Explain movement of deoxygenated blood
Enters the right side of the heart via vena cava fills into right atrium through av valve into right ventricle which is then moved out of the heart through semi lunar out of pulmonary artery to the lungs
Explain the movement of oxygenated blood
Into the heart very pulmonary vein into left atrium down av valve into left ventricle up the semilunar valve and out of the heart via the aorta to the body
What is the cardiac cycle
Series of events that take place in a heart beat
How does volume and pressure correlate
Volume increase (pressure decrease)
Volume decrease (pressure increases)
Atrial systole
Atrial contracts, volume decreases, pressure increases higher than ventricles so semilunar open this causes ventricular pressure to increases
Ventricular systole
Volume decreases, pressure increases, pressure higher than atria(av valves close) and higher than pulmonary vein/ aorta so semi lunar open
