Describe four chamber of heart ?
Answers
The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygen-rich blood to the body
Heart is four chambered: two upper chambers are called atria (singular: atrium) while two lower chambers are called ventricles.
A thin muscular wall called inter–atrial septum separates right and left atria whereas inter-ventricular septum separates right and left ventricles.
The atrium and ventricle of the same side are also separated by a thick fibrous tissue called atrio– ventricular septum.
Ventricles have thicker muscular wall. The left ventricle has the thickest myocardium as it has to pump blood forcefully to all body parts.
Ventricular walls have well developed network of ridges called papillary muscles or musculi papillares.
Chordae tendinae are white elastic threads extending from atrio–ventricular valves to papillary muscles. These elastic threads prevent opening of A–V valves into atria and hence backflow of blood from ventricles to atria during ventricular contraction.
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