9.5 - The Excretory System

Question 1

What are the functions of the excretory system?

Answer 1

1. Toxins into environment
2. Regulate fluids and water in the body

Question 2

How does excretion work in unicellular organisms?

Answer 2

Toxins into environment regulate fluids and water in the body

Question 3

How does excretion work in earthworms?

Answer 3

Invertebrates have a metanephridia system that expel wastes from the body

Question 4

What happens during metanephridia?

Answer 4

In each segment of the earthworm, hemolymph flows into the metanephridium; ions and wastes are reabsorbed from nephridopores that reabsorb and excrete wastes out of worms

Question 5

How does excretion work in the grasshopped?

Answer 5

Use Malpighian Tubules: System of tubes that deliver wastes to intestines in insects via reabsorption and excretion

Question 6

How does excretion work in non-mammalian vertebrates

Answer 6

Conserve water by excreting nitrogenous wastes in the form of an almost water-free paste of uric acid and crystals
This is excreted into the cloaca