2.68a Excretion

• Excretion in kidney. The molecule of urea.
• Urea contains nitrogen which is toxic to the body and cannot be stored.
• Amino acids are normally use for growth but the extra amino acids is excess must be remove there toxic.
• The blood serculated to the liver and the amino acids are converted around whihc is called urea.
• The kidney will filter the urea from the blood.

*Why does the kidney need to be filter?