The human heart beats about ____ times / minute.

Correct! Wrong!

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The human heart beats about 72 times per minute.

Cells formed in the bone marrow are ____.

Correct! Wrong!

Bone marrow is the site of production of erythrocytes and leucocytes.

Pericardial fluid protects the heart from external shocks and injury.

Correct! Wrong!

Pericardial membrane encloses a fluid that prevents the heart from mechanical shocks.

Only ____ have completely divided four chambered heart.

Correct! Wrong!

Birds and mammals are highly evolved warm blooded vertebrates. They possess completely divided four chambered heart.

The mitral valve is also known as the ____.

Correct! Wrong!

The bicuspid valve is also known as the mitral valve, and it is present between the left auricle and left ventricle.

Which among the following is not a function of blood?

Correct! Wrong!

Blood carries waste product called urea from liver to kidney for excretion in urine.

Contraction of auricles of the heart is called ____.

Correct! Wrong!

Contraction of auricles of the heart is called systole.

Blood flowing through single circuit circulation is ____.

Correct! Wrong!

Single circuit circulation is seen in fishes. Deoxygenated blood flows through heart.

The normal rate of heart beat in an adult is ____ per minute.

Correct! Wrong!

Under normal conditions the human heart beats 72 times per minute.

The number of chambers in a human heart is____.

Correct! Wrong!

The human heart consists of four chambers, two upper auricles or atria, and two lower ventricles.

In higher vertebrates, systemic circulation takes place between ____.

Correct! Wrong!

In higher vertebrates, systemic circulation takes place between heart and body parts.

The circulatory system consists of the heart, arteries, veins and ____.

Correct! Wrong!

The circulatory system consists of the heart, arteries, veins and capillaries.

____ surrounds and protects the heart.

Correct! Wrong!

Pericardium surrounds the heart and protects it from external shocks.

Arteries have thin elastic walls.

Correct! Wrong!

Arteries have thick elastic walls to withstand the high pressure with which blood flows through them.

The pulmonary vein opens into ____.

Correct! Wrong!

Pulmonary vein carries oxygenated blood from the lungs to the heart and opens into the left auricle.

The pulmonary artery arises from the ____.

Correct! Wrong!

The pulmonary artery arises from the right ventricle and carries deoxygenated blood to the lungs.

The valve between the left auricle and left ventricle is called ____.

Correct! Wrong!

Mitral valve regulates the flow of blood from left auricle to the left ventricle. It lies between the left auricle and left ventricle.

Which of the following components of blood help in blood coagulation?

Correct! Wrong!

Blood platelets secrete thromboplastin to initiate clotting of blood, thereby helping in coagulation of blood.

Which among the following is incorrect about lymph?

Correct! Wrong!

Lymph is an extracellular fluid that does not contain red blood cells.

The upper two chambers of the heart are called ____.

Correct! Wrong!

The human heart has four chambers and the upper two chambers are called auricles or atria.

The chief function of the lymph node is to ____.

Correct! Wrong!

The chief function of the lymph node is to produce white blood cells.

Valves of veins prevent the backward flow of blood under ____.

Correct! Wrong!

Valves always maintain flow of blood in one direction. Pressure of blood in veins is lower than arteries that causes prevention of backward flow.

The chief function of lymph in a mammalian body is to ____.

Correct! Wrong!

Lymph contains antibodies that destroy or neutralize the pathogens and protect the body against infections.

Sphygmomanometer is an instrument used to ____.

Correct! Wrong!

Sphygmomanometer is an instrument used to measure blood pressure.

The valve that prevents backward flow of blood from the left auricle to the right auricle is the ____.

Correct! Wrong!

The valve that prevents the backward flow of blood from the left auricle to the right auricle is the tricuspid valve.

Lymph contain red blood cells.

Correct! Wrong!

Lymph is similar to plasma and lacking red blood cells and large proteins.

Which among the following occurs when a clot is formed in an undamaged blood vessel?

Correct! Wrong!

The clot may block the flow of blood to the tissues beyond the clot and may result in cutting off food and oxygen to those tissues.

The artery that supplies blood to all parts of the body is called ____.

Correct! Wrong!

The dorsal aorta supplies oxygenated blood from the heart to the different parts of the body.

ICSE Class 10th Biology 6 - Circulatory System MCQS
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