Systems

Question 1

Tracheal

Answer 1

gas exchange

*network of branching tubules in body
*supplies O2 directly to body cells
*circulatory system not involved in gas exchange
*some insects use flight to pump air in

Question 2

Gills

Answer 2

gas exchange
can absorb 80% of water oxygen

Question 3

Lungs

Answer 3

gas exchange

*circulatory system (open or closed) transports gases between lungs and body
* Lungs filled with positive pressure in amphibians, negative in mammals

Question 4

Protonephridia

Answer 4

excretory

*Protonephridium - network of dead-end tubules that branch through body
*smallest branches capped by flame bulb
*excrete dilute fluid
*found in worms

Question 5

Metanephridia

Answer 5

Excretory

*open ended tubules that collect fluid and produce urine
*function in excretion + osmoregulation
*found in mollusca and worms (each segment)

Question 6

Malpighian Tubules

Answer 6

Excretory

*blind tubes arising from gut
*remove nitrogenous wastes + fxn in osmoregulation
*mostly uric acid
*conserves water very well

Question 7

Kidneys

Answer 7

Excretory

*found in vertebrates
*fxn in excretion + osmoregulation
*nephrons are functional unit
*produce urine hyperosmotic to body fluids