Chapter Overview
This chapter provides an overview of the diversity of the animal world and the systematic classification of animals into various groups. It covers the basis of classification, key features of major phyla, and examples of representative organisms. Emphasis is laid on the structural organization, symmetry, coelom, segmentation, and embryonic layers.
Important Keywords
- Symmetry: Arrangement of body parts around a central point or axis (e.g., radial, bilateral).
- Coelom: Body cavity lined with mesoderm.
- Diploblastic: Organisms with two germ layers – ectoderm and endoderm.
- Triploblastic: Organisms with three germ layers – ectoderm, mesoderm, and endoderm.
- Metamerism: Body segmentation seen in organisms like annelids.
- Notocord: A rod-like structure present in chordates.
- Porifera to Chordata: Major phyla of Animal Kingdom.
- Open/Closed Circulatory System: Types of circulatory systems in animals.
Detailed Notes
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