Question

Internal structure of the heart​

Answer 1

Explanation:

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.

Answer 2

Answer:

heart is a mesodermellay derived organ situated in the thoracic cavity.

• heart has four Chambers.The upper two small chambers are called atria or atrium and the two lower large chambers are called ventricle.
• heart is divided into two halves by spectum.The main function of spectum is to prevent the mixing of oxygenated and deoxygentaed blood.
• a thick muscular wall called the inter atrial septum separate the right and left atria and a thick walled inter ventricle septum separate right and left ventricle.
• the atrium and ventricle of same side are also separated by thick fibrous tissue called strip ventricular septum.
• septum also have some openings through which the two chambers are connected for blood transfer.
• these opening are called valve.There are two valve present. Biscuspid and Tricuspid valve.The main function of these valves is to prevent the back flow of the blood.
• Right ventricle then open in pulmonary artery and left ventricle in aorta.