Modes of Living and Surafce Area to Volume (Grade 11 NSC Matric Life Sciences): Flashcards
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Body plan
Body plan
The way an animal's body is organised
Cephalisation
Cephalisation
Development of distinct head region with sensory organs
Triploblastic
Triploblastic
Three tissue layers
Coelomate
Coelomate
Has a body cavity (coelom)
Example organism in Porifera
Example organism in Porifera
Sponges
Symmetry type in Cnidaria
Symmetry type in Cnidaria
Radial
Mode of living: Platyhelminthes
Mode of living: Platyhelminthes
Most are internal parasites, some free-living
Surface area to volume ratio
Surface area to volume ratio
Compares outer surface to internal volume
SA:V ratio in large animals
SA:V ratio in large animals
Less surface area per unit of volume
Why flatworms are flat
Why flatworms are flat
To maximise surface area for gas exchange