Each kidney contains millions of microscopic filtering units called ureters.

The Bowman's capsule and glomerulus together form the Malpighian body.

Nitrogenous waste products are removed through

1. lungs
2. kidneys
3. sweat glands
4. liver

The opening at the bottom of the urinary bladder is called

1. nephron
2. uriniferous tubule
3. urethra
4. nephridia