THE STRUCTURAL ORGANISATION OF LIVING ORGANISM

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The animal body is a complex system organised in levels beginning from the chemical formations that exists in the biochemicals like carbohydrates that are made up of carbon,hydrogen and oxygen molecules, to structural compounds like phospholipids that make up part of cell membranes and other cell organelles( part/structures that make up a cell), to the cellular level where cell organelles together form the smallest basic structural and functional unit of the organism. Cells that perform a similar function, grouped together are called tissues. several tissues working together to achieve a function form an organ, like the liver or the heart. when several organs are working together to achieve a function they are called organ systems like the respiratory and musculoskeletal systems. The whole animal/being is made up of several organs systems that work together to ensure basic body requirements to support life are met; for example the digestive and excretory systems  avail food to the organism and facilitate removal of waste products, reproductive system that allows the propagation of the species when the old/parent organism dies, and immune systems that fight disease and infection. The human body is made up of 12 systems that include;

  1. INTEGUMENTARY SYSTEM
  2. RESPIRATORY SYSTEM
  3. REPRODUCTIVE SYSTEM
  4. GASTROINTESTINAL SYSTEM
  5. GENITO-URINARY SYSTEM
  6. EXCRETORY SYSTEM
  7. NERVOUS SYSTEM
  8. MUSCULOSKELETAL SYSTEM 
  9. CARDIOVASCULAR SYSTEM
  10. LYMPHATIC SYSTEM 
  11. IMMUNE SYSTEM 
  12. ENDOCRINE SYSTEM 

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