Question

write a short note on the structure of human heart​

Answer 1

The human heart is a four-chambered muscular organ, shaped and sized roughly like a man's closed fist with two-thirds of the mass to the left of midline.

Answer 2

Answer:

• The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood.
• The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.
• The lungs re-oxygenate the blood and send it to the left atrium.
• Blood moves from the left atrium to the left ventricle via the bicuspid valve; blood is pumped out of the left ventricle to the aorta, which sends blood to the organs and muscles of the body.
• The heart is composed of three layers: the epicardium (outer layer), the myocardium (middle layer), and the endocardium (inner layer).

Key Terms • aorta: the largest artery in the human body which carries the blood from the heart to all parts of the body except the lungs • inferior vena cava: large vein that carries deoxygenated blood from the lower half of the body to the right atrium of the heart • superior vena cava: large vein that carries deoxygenated blood from the upper half of the body to the right atrium the heart.

Hope it helps you..!!