THE CIRCULATORY SYSTEM - Q&A

Question 1Which fluid occupies the spaces between cells in the organs?

Question 2What type of circulatory system is found in humans where blood flows through vessels?

Question 3Which organ acts as the pumping station for the human circulatory system?

Question 4What percentage of blood plasma is made up of water?

Question 5Which mineral gives blood its saltish taste?

Question 6What is the liquid part of blood called?

Question 7Which blood cells are also known as erythrocytes?

Question 8What is the primary function of haemoglobin in RBCs?

Question 9What happens to a mature human Red Blood Cell?

Question 10What is the typical lifespan of more than two million RBCs in the human body?

Question 11Which blood cells are also known as leucocytes?

Question 12What is the primary function of White Blood Cells?

Question 13What are the special chemicals produced by some WBCs to destroy germs?

Question 14Which blood cells are responsible for the clotting of blood?

Question 15What is the technical name for platelets?

Question 16Which enzyme-driven protein helps convert fibrinogen into fibrin during clotting?

Question 17What is 'serum' in the context of blood?

Question 18In which disease does the platelet count drop significantly (to 25-30 thousand)?

Question 19Which organ receives nutrients transported by blood from the small intestine?

Question 20Where does blood carry carbon dioxide for it to be breathed out?

Question 21Which blood vessels carry blood away from the heart?

Question 22Which blood vessels possess valves to prevent backflow?

Question 23Which artery is the exception and carries deoxygenated blood?

Question 24Which vein is the exception and carries oxygenated blood?

Question 25What is the name of the narrowest blood vessel consisting of a single layer of cells?

Question 26What is the weight of an average adult human heart?

Question 27The heart is made of which specialized muscles?

Question 28What is the fluid-filled space protecting the heart called?

Question 29What are the two upper chambers of the heart called?

Question 30Why are ventricles called 'distributing chambers'?

Question 31Which structure separates the heart into right and left portions?

Question 32Which valve guards the opening between the right auricle and right ventricle?

Question 33Which valve guards the opening between the left auricle and left ventricle?

Question 34Which large vein brings deoxygenated blood from the upper parts of the body?

Question 35What is the largest artery in the body that leaves the left ventricle?

Question 36What do we call the valves at the opening of the pulmonary artery and aorta?

Question 37How many times does a normal human heart beat per minute?

Question 38What produces the sound of a heart-beat?

Question 39Which instrument does a doctor use to amplify heart-beat sounds?

Question 40What is the normal blood pressure level of a healthy person?

Question 41What is the medical term for high blood pressure?

Question 42Which instrument is used to measure blood pressure?

Question 43What is a cardiac arrest?

Question 44What is the most common cause of cardiac arrest?

Question 45What is the difference between a heart attack and cardiac arrest regarding consciousness?

Question 46Who identified the different ABO blood groups in 1900?

Question 47On what basis are blood groups differentiated?

Question 48Which blood group is known as the 'Universal Donor'?

Question 49Which blood group is known as the 'Universal Recipient'?

Question 50How much blood is typically withdrawn from a donor at one time?

Statement 1The human circulatory system is classified as an open vascular system.

Statement 2Blood, tissue fluid, and lymph are the three principal fluids in our body.

Statement 3In insects, blood flows from the heart to body tissue spaces without vessels.

Statement 4The liquid part of the blood is called corpuscles.

Statement 5About 90 percent of blood plasma is made up of water.

Statement 6Blood tastes saltish due to dissolved minerals like sodium chloride.

Statement 7Red blood cells are also known as leucocytes.

Statement 8A mature human red blood cell lacks a nucleus.

Statement 9The red colour of RBCs is due to an iron-protein compound called haemoglobin.

Statement 10Haemoglobin acts as the primary oxygen-carrier in the body.

Statement 11More than two million red blood cells are destroyed every second in the human body.

Statement 12White blood cells (WBCs) are larger than red blood cells (RBCs).

Statement 13WBCs contain haemoglobin, which gives them a faint yellow colour.

Statement 14Some WBCs produce antibodies to destroy germs.

Statement 15Platelets are also called thrombocytes.

Statement 16Platelets are the largest cells found in human blood.

Statement 17Blood clotting helps prevent excessive blood loss and entry of germs.

Statement 18Thrombin helps convert fibrinogen into fibrin during the clotting process.

Statement 19Serum is blood plasma that still contains fibrinogen.

Statement 20In dengue fever, the platelet count can drop as low as 25-30 thousand per cubic mm.

Statement 21Blood carries oxygen from the body cells to the lungs to be breathed out.

Statement 22Blood helps regulate body temperature by distributing heat.

Statement 23Arteries carry blood away from the heart to other parts of the body.

Statement 24Veins have thick, elastic, and muscular walls compared to arteries.

Statement 25Blood in arteries usually flows with jerks and under great pressure.

Statement 26All arteries in the human body carry oxygenated blood.

Statement 27The pulmonary artery carries deoxygenated blood to the lungs.

Statement 28Veins possess valves to prevent the backflow of blood.

Statement 29The pulmonary vein is the only vein that carries oxygenated blood.

Statement 30Capillaries are the terminal branches of an artery that rejoin to form a vein.

Statement 31Capillary walls are made of multiple layers of cells to prevent leaking.

Statement 32The human heart is roughly the size of one's folded fist.

Statement 33The heart is located on the far right side of the chest cavity.

Statement 34Cardiac muscles work continuously without rest throughout a person's lifetime.

Statement 35The pericardial fluid protects the heart from shocks and mechanical stress.

Statement 36The human heart consists of three chambers.

Statement 37Auricles are the 'receiving chambers' of the heart.

Statement 38Ventricles have thinner walls than auricles because they don't pump blood far.

Statement 39A muscular septum separates the heart into right and left portions.

Statement 40Blood in the right side of the heart mixes with blood on the left side regularly.

Statement 41The tricuspid valve is located between the right auricle and right ventricle.

Statement 42The bicuspid valve is also known as the mitral valve and has two flaps.

Statement 43The superior vena cava brings deoxygenated blood from the lower parts of the body.

Statement 44The aorta carries oxygenated blood from the left ventricle to the body.

Statement 45Semi-lunar valves ensure blood does not flow back into the ventricles.

Statement 46The right auricle receives oxygen-rich blood returning from the lungs.

Statement 47Both auricles contract together, and both ventricles contract together.

Statement 48The average adult heart beats approximately 72 times per minute.

Statement 49A pulse can be felt in arteries located just below the skin, such as at the wrist.

Statement 50The closing of heart valves produces the sound of the heart-beat.

Question 1The transport system in humans that carries food, oxygen, and metabolic wastes is called the ______ system.

Question 2The three principal fluids in our body are blood, tissue fluid, and ______.

Question 3Tissue fluid occupies the spaces between ______ in the organs.

Question 4A type of blood circulation where blood flows all the time through blood vessels is called a ______ vascular system.

Question 5In insects, blood mostly flows through open spaces, which is known as an ______ blood circulatory system.

Question 6The to and fro movement of blood carried out by the heart through vessels is the ______ system.

Question 7Blood is composed of two main parts: the liquid part called ______ and the cellular part called corpuscles.

Question 8Plasma is yellowish in colour and consists of about ______ percent water.

Question 9Blood tastes saltish due to dissolved minerals like ______.

Question 10The three types of blood cells are RBCs, WBCs, and ______.

Question 11Red blood cells are also known as ______.

Question 12A mature human red blood cell lacks a ______.

Question 13The red colour of RBCs is due to an iron and protein compound called ______.

Question 14Haemoglobin acts as the ______-carrier in the blood.

Question 15White blood cells are also called ______.

Question 16Unlike RBCs, WBCs have a distinct oval or ______ nucleus.

Question 17The main function of WBCs is to provide ______ to the body.

Question 18WBCs produce special chemicals called ______ which destroy germs.

Question 19Platelets are also known as ______.

Question 20The primary role of platelets is to help in the ______ of blood.

Question 21Damaged platelets release an ______ that initiates the clotting process.

Question 22Thrombin helps in the conversion of fibrinogen into ______.

Question 23A watery liquid called ______ oozes out of a wound after a clot forms.

Question 24Serum is actually blood plasma without its ______.

Question 25In ______ fever, the number of platelets can drop to as low as 25-30 thousand per cubic mm.

Question 26Blood transports nutrients from the ______ to the liver.

Question 27Waste products are carried by the blood to the ______ for excretion.

Question 28Blood regulates body temperature by distributing ______ to different body parts.

Question 29The three kinds of blood vessels are arteries, veins, and ______.

Question 30An ______ is a vessel that carries blood away from the heart.

Question 31Arteries have thick, ______ and muscular walls.

Question 32A ______ is a vessel that takes blood from an organ towards the heart.

Question 33Veins possess ______ to prevent the backflow of blood.

Question 34The ______ artery is the only artery that carries deoxygenated blood.

Question 35The ______ vein is the only vein that carries oxygenated blood.

Question 36Capillary walls consist of a single layer of cells called ______.

Question 37The heart is roughly the size of one's ______.

Question 38The specialized muscles of the heart are called ______ muscles.

Question 39The heart is enclosed in a double-membrane filled with ______ fluid.

Question 40The two upper chambers of the heart are called ______.

Question 41The two lower chambers of the heart are called ______.

Question 42Auricles are known as the ______ chambers.

Question 43Ventricles are known as the ______ chambers.

Question 44A muscular wall called the ______ separates the right and left sides of the heart.

Question 45The opening between the right auricle and right ventricle is guarded by the ______ valve.

Question 46The opening between the left auricle and left ventricle is guarded by the ______ valve.

Question 47The ______ brings deoxygenated blood from the upper parts of the body to the right auricle.

Question 48The ______ brings deoxygenated blood from the lower parts of the body to the right auricle.

Question 49The largest artery in the body is the ______.

Question 50Valves that resemble a half moon are called ______ valves.

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