give reasons :
1.the heart gives away impure blood through an artery.
2.we feel cool in summers while sweating.
3. if plants do not get enough water,they droop and wilt.
1. The impure blood containing CO2 is supplied to lungs by heart for purification (oxygenation) through pulmonary artery.
Kindly post rest of the queries in seperate threads.
Kindly post rest of the queries in seperate threads.