👅
Module 23: Excretion in
Humans
Created @November 30, 2022 2:26 PM
Reviewed
Status Not started
TOPICS TO BE COVERED
Describe the process of excretion in various organs
KEY TERMS
Excretion: The removal or elimination of metabolic waste from an organism
Egestion: The removal of undigested solid food waste from the digestive tract in the
form of faeces. The process is known as defaecation
Secretion: The release of a useful substance (enzymes, saliva) from cells or glands
Metabolism: Chemical reactions that take place within every cell of the body. These
can be building up (anabolic) or breaking down (catabolic) reactions.
NOTES
Waste Products Origin Excreted product
Lungs
Carbon Dioxide Cellular respiration and
CO2 and H2O in Exhaled air
and water Vapor Gaseous exchange
Module 23: Excretion in Humans 1
, Waste Products Origin Excreted product
Skin (Sweat
glands)
Mineral salts,
extracted from the
traces of urea perspiration (sweat)
blood
and water
Liver
Deamination of excess
Urea faeces
amino acids
breakdown of
Bile pigments faeces
haemoglobin
Colon
Bile pigments, from the breakdown of
excess mineral haemoglobin in the faeces
salts liver
Kidney
Deamination of access Urine - Urine is a liquid that contains water and
Urea amino acids in the liver nitrogenous waste products including urea, uric
(into urea) acid and ammonia.
excess taken in with
Mineral salts Urine
food
Excess water
Water consumed and taken in Urine
as food
TOPICS TO BE DISCUSSED:
Describe the structure of the urinary system and the kidney
KEY TERMS
Osmoregulation: The control of water levels in the body
Adipose: Fat tissue
Aorta: The main artery leaving the heart, supplying the body with blood
Module 23: Excretion in Humans 2
Module 23: Excretion in
Humans
Created @November 30, 2022 2:26 PM
Reviewed
Status Not started
TOPICS TO BE COVERED
Describe the process of excretion in various organs
KEY TERMS
Excretion: The removal or elimination of metabolic waste from an organism
Egestion: The removal of undigested solid food waste from the digestive tract in the
form of faeces. The process is known as defaecation
Secretion: The release of a useful substance (enzymes, saliva) from cells or glands
Metabolism: Chemical reactions that take place within every cell of the body. These
can be building up (anabolic) or breaking down (catabolic) reactions.
NOTES
Waste Products Origin Excreted product
Lungs
Carbon Dioxide Cellular respiration and
CO2 and H2O in Exhaled air
and water Vapor Gaseous exchange
Module 23: Excretion in Humans 1
, Waste Products Origin Excreted product
Skin (Sweat
glands)
Mineral salts,
extracted from the
traces of urea perspiration (sweat)
blood
and water
Liver
Deamination of excess
Urea faeces
amino acids
breakdown of
Bile pigments faeces
haemoglobin
Colon
Bile pigments, from the breakdown of
excess mineral haemoglobin in the faeces
salts liver
Kidney
Deamination of access Urine - Urine is a liquid that contains water and
Urea amino acids in the liver nitrogenous waste products including urea, uric
(into urea) acid and ammonia.
excess taken in with
Mineral salts Urine
food
Excess water
Water consumed and taken in Urine
as food
TOPICS TO BE DISCUSSED:
Describe the structure of the urinary system and the kidney
KEY TERMS
Osmoregulation: The control of water levels in the body
Adipose: Fat tissue
Aorta: The main artery leaving the heart, supplying the body with blood
Module 23: Excretion in Humans 2
