Excretory System-note 6

Question 1

Single called organisms excretion

Answer 1

Use contractile vacuoles to pump excess fluid out

Ex. Paramecium

Question 2

Earthworms excretion

Answer 2

Have metanephridria that expels wastes
Hemolymph (any fluid outside cell and blood) flows into pairs of metanephridria
Ions and wastes are absorbed and secreted into a bladder

Question 3

Insects excretion

Answer 3

Malphigian tubules found in insects

• closed end in hemolymph
• open ends empty into intestine
• secrete Utica acid sodium and potassium with digestive waste

Question 4

Reptiles and birds secretion

Answer 4

Excrete nitrogenous waste as Uric acid
Excreted from cloaca (end of digestive tract) as paste
Have sweat glands in head

Question 5

Function of kidney

Answer 5

Remove waste from blood
Balance pH
Maintain water balance in blood

Question 6

Major waste products ?

Answer 6

Ammonia (fish)
Urea (mammals)
Utica acid (birds)