In human beings the oxygen rich blood is pumped out to the body by:
- (a) contraction of right atrium
- (b) relaxation of left ventricle
- (c) contraction of right ventricle
- (d) contraction of left ventricle
Transportation in human beings
High importanceUsually 1 marks a paper · mostly very short answers and assertion-reason · asked in 3 of the last papers
Notes are being written
The board questions below are real and complete — they come from the CBSE papers themselves. The written notes for this topic are still being prepared.
Board questions on this topic
4 from the CBSE papers we hold — the exact wording the board used.
Besides minimising the loss of blood, why is it essential to plug any leak in a blood vessel ? Name the component of blood which helps in this process and state how this component performs this function.
Assertion (A): Blood clotting prevents excessive loss of blood. Reason (R): Blood clotting is due to blood plasma and white blood cells present in the blood. Options:
- (a) Both
- (b) and (R) are true and (R) is the correct explanation of (A).
- (c) Both
- (d) and (R) are true, but (R) is not the correct explanation of (A).
- (e) is true, but (R) is false.
- (f) is false, but (R) is true.
Name the type of blood (oxygenated / deoxygenated) transported by each of the following mentioning the path (i.e. from one organ (which place) to another (which place)): (i) Vena cava (ii) Pulmonary artery.