Maharashtra Board Solutions for Chapter: Respiration and Circulation, Exercise 19: Exercise

Match the Respiratory surface to the organism in which it is found.

Shreyas went to a garden on a wintry morning. When he came back, he found it difficult to breath and started wheezing. What could be the possible condition and how can he be treated?

Why can you feel a pulse when you keep a finger on the wrist or neck but not when you keep them on a vein?

A man pulse rate is $68$  and cardiac output is $5500{ \mathrm{cm}}^3$. Find the stroke volume.

Which blood vessel of the heart will have the maximum content of oxygen and why?

If the duration of the atrial systole is $0.1\sec$ and that of complete diastole is $0.4\sec$, then how does one cardiac cycle complete in $0.8\sec$ ?

How is blood kept moving in the large veins of the legs?

Describe histological structure of artery, vein and capillary.