Post by Admin on Nov 21, 2016 11:52:16 GMT
Excretion
• Excretion is the removal of wastes from the body.
Excretory Organs
• The human excretory organs are the lungs, the skin and the kidneys.
• The lungs excrete carbon dioxide and water.
• The skin excretes sweat (water and salts).
• The kidneys excrete urine (urea, water and salts) .
The Urinary System
• The kidneys filter the blood and remove urea and salts. They also remove water if the blood is too dilute.
• Blood is brought to the kidneys in the renal artery.
• Blood exits the kidneys in the renal vein.
• Urine passes from the kidneys through the ureters, bladder and urethra.
• Excretion is the removal of wastes from the body.
Excretory Organs
• The human excretory organs are the lungs, the skin and the kidneys.
• The lungs excrete carbon dioxide and water.
• The skin excretes sweat (water and salts).
• The kidneys excrete urine (urea, water and salts) .
The Urinary System
• The kidneys filter the blood and remove urea and salts. They also remove water if the blood is too dilute.
• Blood is brought to the kidneys in the renal artery.
• Blood exits the kidneys in the renal vein.
• Urine passes from the kidneys through the ureters, bladder and urethra.