Question

Give reasons
1) transportation of substances in living organism
2) the heart gives away impure blood through an artery
3) why we feel cool in summer while sweating

Answer 1

1.)Substances like food,oxygen etc needs to be transported around the body as all organs require certain substances to do a certain task like muscles require food and oxygen to use energy and not only muscles require these but all organs,tissues,cells etc require food and oxygen.
this is the importance of transportation of substances in living organisms.
2.)The impure blood containing CO2 is supplied to lungs by heart for purification (oxygenation) through pulmonary artery.
3.)Youfeel cool afteryousweatbecause your body releases heat through .... whensweatevaporates it takes the latent heat from our body andwe feel cool.