Question

An atrioventricular valve prevents the backflow or leakage of blood from-
A. The right ventricle into the right atrium
B. The left atrium into the left ventricle
C. The aorta into the left ventricle
D. The pulmonary vein into the right atrium

Answer 1

Hint: A fluid connective tissue containing plasma called blood. It has 3 different types of cells, white blood cells (WBC), Red blood cells (RBC), and platelets. These 3 cells help in the transport of different substances.

Complete answer:
The right ventricle into the right atrium: Another name of the human circulatory system is the vascular system containing a muscular chambered heart. Our heart has four chambers namely, Right ventricle, left ventricle, Right atria, and left atria. A small muscular wall called the interatrial septum which divides the right and left atria. Similarly, a broad walled interventricular septum which divides the left and right ventricles. Atria and ventricles are divided by a wide fibrous tissue called the atrioventricular septum. The opening between the right atrium and the left ventricle is surrounded by value to form 3 muscular cusps called the tricuspid valve. Whereas opening the between the left atrium and left ventricle surrounded by a valve called the bicuspid valve. The valves in the heart permit the flow of blood only in one way from atria to the ventricles and by the ventricles to the aorta.
The left atrium into the left ventricles: Left atrium collects the blood (oxygenated) from the left and right pulmonary vein which pushes blood to left ventricles.
The aorta into the left ventricles: The blood is pushed out from a left ventricle to the aorta to all the parts of the body.
The pulmonary vein into the right atrium: pulmonary vein transfers the blood which is freshly oxygenated from the lungs to the left atria of the heart.
So, the correct answer is “Option A”.

Note:
The circulatory system is a build-up of blood vessels that transfer blood away from and towards the heart. Arteries carry blood aside from the heart and the vein carries blood off to the heart. The vascular system (circulatory system) contains nutrients, oxygen, hormones which supply these to the cells. And remove unwanted substances like Carbon dioxide.