Which structure warms and moistens the air you breathe in?
Which of the following is not an excretory organ?
The amount of water lost in urine is controlled by ____________.
Bronchial tubes can contract quickly when a person has ____________
an asthma attack.
What is the name of the process by which excess water or wastes are removed from the body?
Which is not a structure of the urinary system?
What are the tiny structures in the kidneys that filter blood and form urine?