Question

Hi I need a short note on heart.
Please I need it fast.

Answer 1

Hi dear

Heart is a hollow and muscular organ that pumps blood throughout our body. It is located in the middle of the chest. It has four chambers namely left and right atria and right and left ventricles. The approximate heart beat is 72 times per minute. With the average heart beat the heart pumps 10 liters of blood per minute. A double walled sac called pericardium encases the heart and serves to protect it. The outer wall of the heart consists of three layers namely epicardium, pericardium and myocardium. The heart circulates the blood in two pathways called pulmonary circuit and systemic circuit. Unlike the other organs the heart also contracts and relaxes.

Hope this helps!! 

Answer 2

heart:
• heart is a muscular organ which pump s the blood
• It is covered by the pericardial membrane
• It is of the size of humans wrist
• It weighs about 330grams
• I t contains two different chamber s upper one is called atrium and lower one is called ventricle they are further divided into two chamber s each I.e left atrium and right atrium and left ventricle and right ventricle
• so, in total human heart is divided into 4 chambers
function

heart receives the deoxygenated blood from all parts of the body this deoxygenated blood is send to the lungs and their purified and it comes again back to the heart in this way blood comes to the heart two' times this is called as double circulation