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06. Human Circulatory System

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Answer in one line

Prepared by: learnloophq@gmail.com
Last edited 25 days ago by Learn LoopHQ.

Chapter: 06. Human Circulatory System

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Answer in one line
What is the primary function of the circulatory system?
The primary function of the circulatory system is to transport food and oxygen to body cells and remove waste products from them.
What are the two main components of blood?
The two main components of blood are plasma and blood corpuscles (blood cells).
Why are RBCs red in color?
RBCs are red in color due to the presence of an oxygen-carrying pigment called haemoglobin.
Why are WBCs called “soldiers of the body”?
WBCs are called “soldiers of the body” because they defend the body against diseases by fighting against germs and providing immunity.
What is the specific role of blood platelets?
Blood platelets’ specific role is to help stop bleeding at the site of injury by initiating blood clotting.
Name the three kinds of blood vessels.
The three kinds of blood vessels are arteries, veins, and capillaries.
Which blood vessels have valves and why?
Veins have valves to prevent the backflow of blood as it returns to the heart, especially against gravity.
What is the unique role of capillaries?
The unique role of capillaries is to facilitate the exchange of food, oxygen, carbon dioxide, and waste products between the blood and body cells.
Where is the human heart located?
The human heart is located in the thoracic (chest) cavity, slightly towards the left side of the body.
What are the upper two chambers of the heart called?
The upper two chambers of the heart are called auricles or atria.
Which heart chamber pumps oxygenated blood to the entire body?
The left ventricle pumps oxygenated blood to the entire body.
Who was William Harvey?
William Harvey was an English physician who was the first to recognize and demonstrate the circulation of blood in the human body.
What is the difference between systole and diastole?
Systole is the phase of heart muscle contraction when blood is pumped out, while diastole is the phase of relaxation when the heart fills with blood.
What causes the “lub” sound of the heart?
The “lub” sound of the heart is caused by the closing of the cuspid valves (tricuspid and bicuspid) when the ventricles contract.
How is the pulse felt?
The pulse is felt as regular jerks with fingertips pressed over an artery, commonly the radial artery in the wrist, due to the rhythmic contraction of the heart.
What determines a person’s blood group in the ABO system?
A person’s blood group in the ABO system is determined by the presence or absence of specific antigens (Antigen A and Antigen B) on the surface of their red blood cells.
What happens during an incompatible blood transfusion?
During an incompatible blood transfusion, the recipient’s antibodies attack the donor’s antigens, causing the donor’s red blood cells to clump together.
Why is blood group O considered a universal donor?
Blood group O is considered a universal donor because its red blood cells have no antigens, meaning they will not be attacked by antibodies in any recipient’s plasma.
What is the role of a blood bank?
A blood bank is a center where blood collected from volunteer donors is stored and preserved after proper testing for later use in transfusions.
List two food habits that contribute to a healthy heart.
Two food habits that contribute to a healthy heart are eating plenty of fruits and vegetables to get more fibers, and avoiding food with high cholesterol.
How does exercise contribute to a healthy heart?
Regular exercise helps keep the heart healthy by strengthening cardiac muscles, managing weight, and improving overall cardiovascular function.
Which part of the blood helps in regulating body temperature?
Blood helps in regulating body temperature through its circulation throughout the body.
What is the normal range for White Blood Corpuscles (WBCs) per mL of blood?
The normal range for White Blood Corpuscles (WBCs) is about 5000 to 6000 per mL of blood.
Which type of valve is found between the left auricle and left ventricle?
The bicuspid valve (or mitral valve) is found between the left auricle and left ventricle.
What is the time duration for one cardiac cycle?
One cardiac cycle is completed in 0.8 seconds.
Which blood group can receive blood from A and O?
Blood group A can receive blood from A and O.
What is the primary function of the semilunar valves in the heart?
The primary function of the semilunar valves is to prevent the backflow of blood from the pulmonary artery and aorta back into the ventricles after contraction.
What are arterioles?
Arterioles are smaller vessels that arteries divide into upon entering an organ, which then further divide into fine capillaries.
What type of blood is carried by the right auricle?
The right auricle receives deoxygenated blood from the whole body.
What causes the “dub” sound of the heart?
The “dub” sound of the heart is caused by the closing of the pulmonary and aortic (semilunar) valves.
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