Question

explain the heart structure ok

Answer 1

The human heart has four chambers, the right atrium, the right ventricle, the left atrium and the left ventricle. The right and left sides are completely seperated by the septum, this is so that the oxgenated blood and deoxygenated blood are kept seprate and are not able to mix, allowing for maximum oxygenation. The left side carries oxygenated blood and the right side carries deoxygenated blood. There are four sets of valves, two sets of semi-lunar valves, one set between the right ventricle and the pulmonary artery and the other set between the left ventricle and the aorta. There are also two sets of atrioventricular (AV) valves, one set between the right atrium and the right ventricle, which is called the tricuspid valve, the other set of AV valves are between the left atrium and the left ventricle, which is called the bicuspid valve. The valves in the heart are required to prevent backflow of the blood. The ventricle walls are thicker than those of the atria because the ventricles have to pump blood out of the heart to different parts of the body so require more strength to do this, where as the atria only have to pump blood into the ventricles. The left ventricle wall is thicker than the right ventricle wall because the left ventricle has to pump blood to the whole body, where as the right ventricle only pumps blood to the lungs, which is a shorter distance. 
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Answer 2

$\huge\mathfrak\red{Answer :}$


$\textbf{Structure :}$

→ Heart is a hollow, muscular organ present in between two lungs in the thoraric cavity. It's size is about one's fist. It is 12 cm long and 6 cm wide.

→ It's weight in male is 300 gm and 250 gm in female. It's is reddish brown in colour. 

→ It's upper broad part is known as base and lower part is known as Apex. 

→ It's is protected by a double members called pericardium, comprising inner visceral pericardium and outer parietal pericardium.

→ Between these layers there is a fluid called pericardium fluid. This fluid provides moisture to the heart and reduce the friction between heart wall and surrounding tissue.

→ A human heart is four chambered. Two upper; smaller chambers called atria and the lower; longer chambers called ventricle.

→ The atrium and ventricle of the same side are separated by atrio-ventricular septum.

→ Atrial septum separates the left and right atria. Inter ventricular septum separates the left and right ventricles.

→ The opening between right atrium and ventricle is guarded by a valve called Tricupsid valve.

→ And the opening between left atrium and ventricle is guarded by a Bicuspid valve.

→ Valves prevent the backward flow of blood and allow the blood to flow in one direction only.

$\textbf{Function :}$

→ It's main function is pumping the blood.

→ It contains two types of blood i.e. Oxygenated and Deoxygenated.

* Oxygenated is send to all parts of the body.

* Deoxygenated is send to lungs to purify it.
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