Diagram given below indicates one phase of the heart contraction. Name the phase and label the guidelines 1-6.

In the given picture, both the bicuspid and tricuspid valves are closed and both the semilunar valve on both the sides are open, hence, it is showing the ventricular systole. During this, the ventricles contract, forcing blood through the pulmonary artery to the lungs and through the aorta to the rest of the body. The labelled diagram is given below:

Diagram given below indicates one phase of the heart contraction. What does the arrow indicate?

The diagram showing the ventricular systole. The arrows in the diagram show the direction of blood flow. During the ventricular systole, the blood present in the right ventricle flows towards the lungs through the pulmonary artery. The blood present in the right ventricle is deoxygenated. The blood present in the left ventricle flows towards the different organs of the body through the aorta. The blood present in the left ventricle is oxygenated.

The diagram is given below indicates one phase of the heart contraction. How many valves are present in the above diagram? What is the function of the valves?

Two sets of valves are present in the human heart. 1. The atrioventricular valves: These lie between the atria and the ventricles to prevent blood from returning to the atria when the ventricles contract. The tricuspid valve located on the right side of the heart has three cusps or flaps. The bicuspid valve, or mitral valve, on the left side, has two flaps. 2. The semilunar valves guard the openings to the pulmonary artery and the aorta to prevent backflow of blood into the ventricles. Both the valves have three semilunar cusps.

MEDIUM

10th ICSE

IMPORTANT

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The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel in the case given below.

Which vessel begins and ends in capillaries?

Important Questions on The Circulatory System

MEDIUM

10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 7 - The Circulatory System>TEST YOURSELF>Q 1

The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel in the case given below.

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Which vessel will contain the smallest number of red blood cells per unit volume of blood?

MEDIUM

10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 7 - The Circulatory System>TEST YOURSELF>Q 1

The following simplified diagram refers to the outline plan of the circulation of blood in a mammal. Study the diagram and write the number and the name of the blood vessel in the case given below.

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In which vessel will the blood carry the most oxyhaemoglobin?

HARD

10th ICSE

IMPORTANT

ICSE Self - Study in Biology>Chapter 7 - The Circulatory System>TEST YOURSELF>Q 2

Given below is a simple diagram of the circulation of blood in a mammal showing the main blood vessels, the heart, lungs and body tissues. The blood vessels, labelled 6, contain deoxygenated blood and the valve leading to it has three semi-lunar pockets.

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