Edexcel IGCSE Biology 复习笔记 2.9.2 Excretion in Humans

• Humans have organs that are specialised for the removal of certain excretory products
• Excretory organs of the human body include:
  • The kidneys for the excretion of urea, water and mineral ions
  • The lungs for the excretion of carbon dioxide and water
  • The skin for the excretion of excess mineral ions (e.g. sodium) and water
  • The liver for the breakdown of proteins (amino acids) into urea

   

Excretory organs of the human body