Excretory System

Question 1

kidney

Answer 1

bean-shaped, excretory system organ that filters out wastes, water, and salts from the blood and maintains blood pH.

Question 2

urea

Answer 2

nitrogenous waste product

Question 3

excretory structures

Answer 3

Skin (sweat glands)- removes excess water, salts, and urea
Liver – converts nitrogen-based wastes into urea (less toxic)
which is transported in the blood to the kidneys.
Kidneys (nephrons are filtering units): Removes toxins (including urea), Controls the amount of fluids & salts in the body, Maintains blood pH
Ureter
Urethra
Urinary bladder

Question 4

excretory functions (3)

Answer 4

1. Removes metabolic wastes from the body
2. Regulates the amount of fluid and salts in the body
3. Maintains the pH of the blood

Question 5

how do kidneys work

Answer 5

1. Blood enters the kidneys & is cleaned by passing through millions of tiny blood filters (nephrons).
2. Newly cleaned blood returns to the bloodstream.
3. Waste passes through the ureter to the bladder and is eliminated as urine.

Question 6

dialysis

Answer 6

Kidney failure results in waste products & excess fluid buildup in the blood. Dialysis provides a way to filter blood and remove toxins and fluid.