Zusammenfassung der Ressource
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