The excretory system includes the skin, lungs, liver, and __________.

The skin removes excess _________, salts, and a small amount of urea in sweat.

The blood transports ___________, a waste product of cellular respiration.

One of its principal activities is to convert dangerous nitrogen-based wastes into _________, which is a less toxic compound.

Urea is transported through the blood to the ___________ for elimination from the body.

The kidneys produce and excrete a waste product known as __________.

Ureters transport urine from the kidneys to the urinary __________, where urine is stored until it is released through the urethra.

The kidneys respond directly to the composition of the blood. They are also influenced by the _________ system.

If you eat salty food, the kidneys will respond to the excess salt in your blood by returning less salt to your blood during reabsorption.

If the blood is too acidic, then the kidneys excrete more hydrogen ions in the __________.

If your blood glucose levels rise past a certain point, the kidneys will even excrete glucose into the urine. This is one of the signs of ___________, a disease caused by the body's inability to control the concentration of glucose in the blood.

The _____________ system is a network of vessels, nodes, and organs that collects the lymph that leaves capillaries, "screens" it for microorganisms, and returns it to the circulatory system.

___________  nodes act as filters,  trapping microorganisms, stray cancer cells, and debris.

The lymphatic system also plays an important role in the absorption of _________.