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9805
Excretion
Descripción
Leaving Certificate Biology Mapa Mental sobre Excretion, creado por cian.buckley el 28/01/2013.
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biology
biology
leaving certificate
Mapa Mental por
cian.buckley
, actualizado hace más de 1 año
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Creado por
cian.buckley
hace casi 12 años
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Resumen del Recurso
Excretion
Excretion is the removal of the waste products of chemical reactions in the body
The Organs of Excretion
Lungs
Carbon dioxide and water
Kidneys
salts, urea and water
skin
salts and water
Functions of the Parts of the Urinary System
Renal Artery
Carries blood with waste products into the kidneys
Kidney
Filters waste from the blood, forming urine
Renal Vein
carries purified blood out of the kidney
Ureter
Carries urine to the bladder
Bladder
Stores Urine
Urethra
excretes urine
Filtration in the Kidneys
blood entering the kidneys contains useful and waste materials
useful and waste materials are filtered from the blood in the kidneys
useful materials are then reabsorbed back into the bloodstream
e.g. glucose and water
materials left in the kidneys form urine
urea, salts and some water
Functions of the Kidneys
To remove waste products from the blood
To control the amount of water and salts in the body
Skin
Main Functions
To excrete wastes
To protect the body from the entry of organisms that can cause disease
To act as a sense organ
to control the temperature of the body
Sweat
contains salt + water
made by sweat glands under the skin
passes up through sweat ducts
passes out through swear pores
excretes (salt and water) and helps to cool the body when it evaporates
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