Chapter 4-Excretory System

Question 1

Excretion

Answer 1

removal of wastes from the body

Question 2

Lungs

Answer 2

the organ for breathing air. Gas exchange occurs in the lungs.

Question 3

Kidneys

Answer 3

body organs that filter the blood, removing urea and other wastes

Question 4

Nephrons

Answer 4

the filtration and excretory units of the kidney. Each kidney has up to one million nephrons.

Question 5

Ureters

Answer 5

tubes from each kidney that carry urine to the bladder

Question 6

Bladder

Answer 6

sac that stores urine

Question 7

Urine

Answer 7

yellowish liquid, produced in the kidneys. It is mostly water and contains waste products from the blood such as urea, ammonia and uric acid.

Question 8

Urination

Answer 8

passing of urine from the bladder to the outside of the body

Question 9

Urethra

Answer 9

tube through which urine is emptied from the bladder to the outside of the body

Question 10

Bowman’s Capsule

Answer 10

a cup-like structure at one end of a nephron within the kidney, surrounding the glomerulus. It serves as a filter to remove wastes and excess water.

Question 11

Glomerulus

Answer 11

a cluster of capillaries in the kidney that acts as a filter to remove wastes and excess water

Question 12

Haemodialysis

Answer 12

the process of passing blood through a machine to remove wastes