Biodiversity of Animals (Grade 11 NSC Matric Life Sciences): Flashcards
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Body plan
Body plan
Basic structural design & organisation of an animal's body
Cephalisation
Cephalisation
Development of distinct head w/ sense organs & brain tissue
Three main types of body symmetry
Three main types of body symmetry
Asymmetrical, radial, bilateral
Example of asymmetrical animal
Example of asymmetrical animal
Sponges
Bilateral symmetry: planes of division
Bilateral symmetry: planes of division
One plane (sagittal) creating left & right halves
Ectoderm develops into
Ectoderm develops into
Skin/protective epithelium & nervous system
Endoderm develops into
Endoderm develops into
Digestive system & associated organs
Diploblastic animals
Diploblastic animals
Animals w/ 2 germ layers (ectoderm + endoderm)
Triploblastic animals
Triploblastic animals
Animals w/ 3 germ layers (ectoderm + mesoderm + endoderm)
Coelom
Coelom
Fluid-filled body cavity between outer & inner layers