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प्रश्न
Why does the heart need valves?
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उत्तर
The heart needs valves to regulate the flow of blood. It allows the blood to flow through the heart only in one direction.
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संबंधित प्रश्न
Name largest vein, in our body.
What are the upper parts of the heart called?
What is the name of blood vessels which connect arteries to veins?
Which one of the following does not have valves?
Put a tick mark (✓) against the correct alternative in the following statement:
Function of WBCs is to
- Transport oxygen
- Help in clotting of blood
- Provide immunity
- Provide storage of food.
Put a tick mark (✓) against the correct alternative in the following statement:
Blood Capillary is a
- Broad tube
- Artery with thick wall
- Vein with large lumen
- Narrow tube made up of endothelium only.
Differentiate between the following pair of terms:
RBC and WBC.
Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
Platelets help in clotting of blood.
Name the instruments used for measuring pulse.
Write in brief about the following:
Blood groups
Define pulse.
What is blood pressure? When does it rise?
Write three types of blood vessels. Give one important feature of each.
The diagram below represents a certain category of blood vessels showing the role of a special structure in their walls :
(i) Name the kind of blood vessels shown.
(ii) What is the structure shown inside the blood vessels?
(iii) What is the role of these structures?
(iv) Are these structures present in any other kind of blood vessel? If so, name it.
(v) Towards which side of the figure (Top or Bottom) is the heart located?
Identify the pulse point ‘A’ from below given diagram.
Identify the term that refers to the study of blood vessels.
Read the explanation given below and name the structure:
The smallest blood vessels in the human body.
From where to where do the following blood vessel carry blood?
Renal artery
Name these:
Three kinds of blood vessels.
