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प्रश्न
What stops blood from flowing backward through the heart?
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उत्तर
The valves present in the right and the left atrium prevent the blood from flowing backward into the atria.
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संबंधित प्रश्न
How many types of blood vessels are there in the human body? Name them.
Differentiate between the following pair of terms:
Vena cava and aorta.
Differentiate between the following pair of terms:
Platelets and WBC.
Give any three differences between an artery and a vein.
You can see some blood vessels on the outside of the hands specially in older people. Are those veins or arteries ? How can you confirm your answer ?
State briefly, the difference between white blood cells and the red blood cells.
Answer very briefly, Red Blood cells have no nucleus, then why do we call them cells?
Fill in the blank.
___________ carry pure blood.
Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
The four blood groups in human beings are A, B, AB and AO.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Differentiate between arteries and veins.
State the Function: Pulmonary vein
Choose the Odd One Out:
Long answer question:
How blood is kept moving in the large veins of the legs?
Identify the CORRECT statement.
Identify the reason because of which the walls of the arteries are thicker than those of veins.
Which of the following blood vessels carry oxygenated blood from lungs to heart?
Identify the CORRECT match.
Why do arteries have thick and elastic walls whereas veins have valves?
The substances to and from the tissues diffuse through the walls of ______.
