2026-02-21 17:48

Status: #new

Tags: #biology #cram #kingdom
1.0e Eukaryote

Animalia

Animal Details

• Eukaryotic and multicellular
• Do not contain cell walls
• Heterotrophs that ingest their food
• Are motile - require
• energy to move
• Reproduce sexually

Classifications

• 1. **Levels of organization
  • Animals can be differentiated based on tissues and organs

• 2. **Number of Body Layers
  • Animals develop from three layers of cells in the embryo
    
• 3. Body Symmetry
  • Animals are either completely asymmetrical, radial or bilateral symmetrical
    
• 4. Body Cavity
  • (Koiloma (cavity) Coelom (body cavity))
  • More complex organisms have a body cavity in which internal organs can develop
  • Essentially a empty space inside an organism
• 5. Segmentation
  • A segmented part of a body has many repetitive sections
    
• 6. Movement
  • Animals have at least one point in their development in which they are motile
  • ie. Coral zygotes swim to a suitable rock to settle in
• 7. Reproduction
  • All animals are able to reproduce sexually. Some are able to reproduce asexually.

• References