excretion
Body expels waste
Excretion is the biological process of expelling waste products from the body—urine, feces, sweat, and exhaled carbon dioxide are all excretions.
The word covers both the act and the substance: The excretion of toxins happens through the kidneys and Lab tests analyzed the animal's excretions.
In technical contexts, excretion distinguishes metabolic waste removal from simple elimination of undigested material.
Renal excretion fluid
- fecesSolid digestive waste
- sweatMoisture from skin pores
- mucusProtective bodily secretion
- bileLiver-made digestive fluid
saliva · tears · pus · sputum · sebum · earwax · cerumen · exudate
Releasing fluid waste
- defecationExpulsion of feces
- voidingNullifying or emptying
- micturitionMedical term for peeing
- evacuationRemoval from danger
expulsion · discharge · sweating · exudation · bowel movement · passing · releasing · emptying
Nitrogenous metabolic waste compound
- ammoniaAcrid nitrogen-hydrogen gas
- carbon dioxideRespiration byproduct, photosynthesis fuel
- metabolitesChemicals from bodily processes
- creatinineMuscular metabolism waste compound
uric acid · bilirubin · waste products · nitrogen · ketones · lactic acid · toxins · byproducts
Liquid refuse in drains
- manureAnimal waste as fertilizer
- dungAnimal fecal matter
- droppingsAnimal excrement deposits
- guanoAccumulated bird droppings
effluent · sludge · night soil · ordure · muck · offal · fecal matter · animal waste
Blood-filtering organ pair
- liverAbdominal detoxifying organ
- bladderOrgan holding urine
- colonLarge intestine section
- skinBody's outer layer
lungs · sweat glands · nephrons · alveoli · rectum · urethra · large intestine · pores
urine
Renal excretion fluid
bile · saliva · tears · pus · sputum · sebum · earwax · cerumen · exudate · lymph
urination
Releasing fluid waste
- defecationExpulsion of feces
- voidingNullifying or emptying
- micturitionMedical term for peeing
evacuation · expulsion · discharge · sweating · exudation · bowel movement · passing · releasing · emptying · clearing
urea
Nitrogenous metabolic waste compound
- ammoniaAcrid nitrogen-hydrogen gas
- carbon dioxideRespiration byproduct, photosynthesis fuel
- metabolitesChemicals from bodily processes
creatinine · uric acid · bilirubin · waste products · nitrogen · ketones · lactic acid · toxins · byproducts · filtration
sewage
Liquid refuse in drains
guano · effluent · sludge · night soil · ordure · muck · offal · fecal matter · animal waste · compost
kidneys
Blood-filtering organ pair
skin · lungs · sweat glands · nephrons · alveoli · rectum · urethra · large intestine · pores · renal
vomit
Eject stomach contents
cathartic · purgative · colonic · diarrhea · regurgitation · cleanse · expulsion · evacuation · purging · bloodletting
glands
Secreting organs
enzymes · endocrine · exocrine · sweat glands · salivary · mucous membranes · glandular · producing · releasing
- kidney functionstubular reabsorption, reabsorption, creatinine clearance, waste removal, water balance
- biologycells, DNA, cell, biology, gene
- digestionstomach acid, swallowing, digesting, chewing, digestion
- zoologymammals, reptiles, amphibians, birds, insects
- bodily needsbreathing, oxygen, food, water, sleep
- body functionsbreathing, digestion, heartbeat, circulation, respiration
excretioningestion
Consuming into the body
absorption · intake · eating · consumption · assimilation
excretionaccretion
Growth through external addition
retention · accumulation · storage · synthesis · deposition