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प्रश्न
The valve which prevents back flow of blood in the veins and lymph vessels ______.
पर्याय
mitral valve
tricuspid valve
semilunar valve
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उत्तर
The valve which prevents the back flow of blood in the veins and lymph vessels is semilunar valve.
संबंधित प्रश्न
Give biological reasons for the following statements:
The left ventricle of the heart has a thicker wall than the right ventricle.
Explain the following:
Why is the closed circulatory system more efficient than the open system?
Put a tick mark (✓) against the correct alternative in the following statement.
Pulmonary vein carries
Fill in the blanks with suitable words given below:
The two lower chambers of the heart are called ______.
True or false:
The four blood groups in human beings are A, B, AB and AO
Match the following.
| Group A | Group B |
| (1) Lungs | (a) Circulation |
| (2) Stomach | (b) Respiration |
| (3) Heart | (c) Co-ordination |
| (4) Brain | (d) Digestion |
Name the systems that carry out the different functions of the body.
What is the location of maturation of T-lymphocytes?
A resting person usually has a pulse rate between 72 to 80 beats per minute.
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
