Give reason for each of the following:
1-. Man urinates less in summer than in winter.
Due to secretion sweat in summer
2-. Sweat has salty taste.
Because it consists of excess water , salts
3-. If the two kidneys are damaged, the person will die.
Because they filter the blood from poisonous material
4-. The skin is one of the excretory organs.
Because it gets rid of excess water , salts in form of sweat
.