
The prevention of backflow of blood inside the heart during contraction is done by

Important Questions on Transportation in Plants and Circulation in Animals
State the main functions of the following:
Coronary Artery.


Figure below reflects the blood circulation system in the human body. Which of the path contains oxygenated blood.

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:


Choose the correct answer from each of the four options given below:
While recording the pulse rate, where exactly does a doctor press on our wrist?

Suggest some precautions to avoid cardiac problems.

Oxygen rich blood from lungs comes to which chamber of the heart-



Choose between the two options to answer the question specified in the brackets for the following.
An example is illustrated below.
Example: Corolla or Calyx (Which is the miter whorl?) Answer: Calyx
Blood in the renal artery or renal vein (Which one has more urea?)

Give appropriate biological or technical terms for the following:
The relaxation phase of the heart.

Choose between the two options to answer the question specified in the brackets for the following.
An example is illustrated below.
Example: Corolla or Calyx (Which is the miter whorl?) Answer: Calyx
Blood in the pulmonary artery or pulmonary vein (Which one contains less oxyhaemoglobin?)

Given below are certain groups of terms. In each group, the first pair indicates a relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Kidney: Renal artery :: Liver : _____.

(v) Pulmonary semilunar valve




Choose the correct answer from each of the four options given below:
A muscular wall is absent in:

Given below are certain groups of terms. In each group, the first pair indicates a relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Brain : Meninges :: Heart : _____.

