Question

Qus: 7) Explain given points with the context of respiration and transportation: (2)
a) What type of arrangement exists in the bodies of large animals to meet their oxygen
requirement adequately?
b) How do the guard cells regulate opening and closing of stomatal pores?​

Answer 1

respiration:

In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the transport of carbon dioxide in the opposite direction

transportation:

In humans, transportation of oxygen nutrients, hormone and other substances to tissue, CO2 to the lungs and waste products to the kidneys is carried out by a well-defined Circulatory System. In lower organisms material is transported by diffusion.