During dialyses the artificial kidney maintains the balance of ___________ and __________________ salts in a patient whose kidneys have failed.

The kidney is ______________.

The organ system responsible for the removal of wastes is called _________________ .

The process of purification of blood in which dialysis through an artificial kidney has to be carried out at frequent intervals is called _________________ .

Many unicellular organisms like_______________________ throw out their waste by diffusion from their body surface .

In vertebrates the main organs of excretion and maintenance of water balance are the ___________________ .

Which of the following are correct ?

(a)  Kidney work in pairs, but they are so efficient that even if one gets damaged, the person can still lead a healthy life .

(b) The kidneys are two bean- shaped organs in the urinary system.

(c) They help the body to pass waste as urine.

Which of the following are correct ?

(a) The kidneys are the main organs of excretion, the skin, lungs and liver also help in excretion .

(b) Skin has sweat glands, through which we excrete small amounts of water, urea and salts.

Which of the following are correct ?

(a) Kidneys help the body to pass waste as urine.

(b) Kidneys also help filter blood before sending it back to the Heart.

(c) The kidney perform many crucial functions, including :maintaining overall fluid balance

Which of the following are correct ?

(a) The liver excretes bile, which contains bile pigments.

(b) Liver is a reddish brown gland situated on the right side in the upper part of the abdomen .

(c) It is the largest gland of our body .