MICROANATOMY

Detailed explanation-1: -The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

Detailed explanation-2: -The heart is an amazing organ. It pumps oxygen and nutrient-rich blood throughout your body to sustain life. This fist-sized powerhouse beats (expands and contracts) 100, 000 times per day, pumping five or six quarts of blood each minute, or about 2, 000 gallons per day.

Detailed explanation-3: -If brain death is confirmed, why does an individual’s heart continue beating? As long as the heart has oxygen, it can continue to work. The ventilator provides enough oxygen to keep the heart beating for several hours. Without this artificial help, the heart would stop beating.

Detailed explanation-4: -systole – this is when your heart contracts, pushing blood out of the chambers. diastole – this is the period between contractions when the muscle of your heart (myocardium) relaxes and the chambers fill with blood.