Biology - Excretion Flashcards
What is excretion
Excretion is the process by which waste products of metabolism are removed from the body
What is waste
the by - product of chemical reactions
Why must waste products be removed from the body
toxic
What are the specialised organs for excretion
kidney, skin, lungs
What is the function of the kidney
To remove water, salts and urea from the body
What is urea
Urea is the waste product of protein breakdown
what makes urine
water + salts + urea
what 2 organs are the kidneys
excretory organ, homeostatic organ
What does the kidney do
regulates the amount of water in the blood
what is the kidneys process of regulating water in the blood called
osmoregulation
what is the function of the lungs
to remove Co2 from the body, O2 drawn into the lungs, co2forced out of the lungs
what is CO2
a metabolic waste product of aerobic respiration
why is the function of the skin
to remover water and salts from the body
what is the excretion process of the skin
via sweat glands
