The coelom is a fluid-filled body cavity that allows organs to grow, move, and function properly. It acts like a cushion and gives space for organ development.

Key Points

• Definition: Fluid-filled cavity between body wall and gut wall.
• Functions:
  
  • Provides space for internal organs.
  • Helps in circulation of nutrients and gases.
  • Acts as a shock absorber.
    
• Types: Acoelomates (no coelom), Pseudocoelomates (false coelom), Coelomates (true coelom).