excretory system

Question 1

nitrogenous waste

Answer 1

excreted along w/ water in form of urine

ammonia, uric (excreted as solid- birds, reptiles), urea (sharks)

Question 2

filtration process

Answer 2

1. filtration- filtrate collects in tissue (water, salts, sugar, AA, n-waste)

cell and large molecules do not get in

2. reabsorption- recovers useful molecules and water back into body fluid
3. secretion- active transport of non-essential solutes and waste out of body fluid (movement of solute control where water goes )
4. excretion- waste removed

Question 3

excretion in animals: protonephridia

Answer 3

in flatworms, molluscs, lancelets, etc.
tubules are connected to extent openings

flame bulbs cap each branch (dead ends)

cilia draws water and solutes from body fluid into flame bulb

Question 4

excretion in animals: metanephridia

Answer 4

annelids- earthworms
each segment has system in earthworm

collects fluid from the column, enveloped by a capillary network, a cilia funnel surrounds opening of collection tube, bladder collects filtrate and release urine out