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excrete

QuestionAnswer
large intestine the part of the intestine between the small intestine & the anus ~1.5m long named because it is larger in diameter than the small intestine
structure * - caecum (attached appendix) - colon - rectum - anus no villi or digestive juices lining secretes mucus
movement - what happens 18-24 hours most of remaining water is absorbed - contents become more solid
bacteria - break down most of remaining organic compounds - some bacteria produce vitamin - minerals & nutrients are absorbed
Faeces material passed out of the rectum
faeces contain 5 - water - bacteria - remains of damaged cells - undigested food (cellulose) - bile pigments
excretion removal of metabolic waste (bile pigments, H2O, CO2, nitrogenous waste, etc) these are toxic and need to be removed before reach harmful concentrate
elimination/ defacation removal of indigestible material, bacteria & bile pigments from the body
other excrete organs lungs - co2 skin/ sweat glands - sweat (contains by products of metabolism) alimentary canal - bile pigments liver - processes substances to be excreted kidney - (major) urine
storage of nutrients glucose - liver & skeletal muscles as glycogen (for cell resp) excess as fat fats - adipose tissue protein & amino acid - cant (toxic build up)
deamination removal of amino group (NH4) from amino acid occurs in liver
why deamination - resolves excess protein problem - if other energy sources exhausted, convert protein to carbs
process of deamination - amino group (NH4) is removed from acid - amino group (NH4) is converted to ammonia (NH3)
deamination word equation amino acid + oxygen --enzymes--> carbohydrates + ammonia
ammonia in body - ammonia is toxic so liver converts to urea (non toxic) - controlled by enzymes - body can handle moderate amounts of urea no harm - excreted by kidneys co2+nh3 --> h2o + urea
urinary system body system composed of kidneys, ureters, bladder & uretha, that is responsible for the excretion of waste, the regulation of blood volume, pressure, pH & concentration of chemicals
Created by: procrast
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