Excretion Flashcards
Excretion definition
removal of waste products
how does excretion regulate interval environment
controls water content
maintain solute composition
excrete metabolic waste products
secretion definition
novelty of a material that has a task after leaving the cell or organism
elimination
removal of unabsorbed food that has never been part of the body
respiration
process by which an organism exchanges gas w the environment
why is waste elimination important
if waste is not removed then cell membranes become disrupted, metabolism is inefficient and potential death
why is waste elimination important
if waste is not removed then cell membranes become disrupted, metabolism is inefficient and potential death
passive transport
= where solutes move without using a transport protein
active transport
= transport of larger and more complex waste using energy and mechanisms
specialised excretion cells in animals
flame cells
kidney
liver
how does a flame cell work in excretion
acts like a kidney and removes waste by filtering
coelom
= fluid filled internal space
separates internal processes from gut
transports fluids
exertion in protists
majority of waste from metabolism are eliminated by diffusion and osmosis
active transport of waste chemicals via protein channels or exocytosis
excretion in fungi
some waste from metabolism eliminated by passive diffusion and osmosis
active transport of waste via exocytosis or protein channels
3 types of excretion in plants
transpiration
storing
diffusion
transpiration
= loss of water/gas via stomata
storing
= organic waste stored in bark and leaves
guttation
drops of xylem sap gathers on tips of leaves when stomata are closed
excretion of nitrogenous waste in animals
converted to ammonia, urea, uric acid and guanine
excretory organs - invertebrate
protonephridia
nephridia
malphingian tube
excretory organs animals
kidneys - solute and water regulation
liver - breaks down blood, toxins and damaged RBC
