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Part of CL-03 — Animal Kingdom

Animal Kingdom: 5 Must-Know Facts for NEET 2026

by Notetube Official•key_points summary•100 words•9 views
  1. Arthropoda is the largest phylum — jointed appendages, chitinous exoskeleton, open circulation, Malpighian tubules; Mollusca is second largest
  2. Coelom triad — Platyhelminthes = acoelomate; Aschelminthes = pseudocoelomate; Annelida onward = coelomate (true coelom)
  3. Three NEET exceptions — Crocodile (4-chambered heart in reptiles); Platypus (oviparous mammal); Cephalopoda (closed circulation in molluscs)
  4. Echinodermata adults are radially symmetrical — larvae are bilateral; the water vascular system operates tube feet
  5. Chordata 4 features — Notochord, Dorsal hollow nerve cord, Pharyngeal gill slits, Post-anal tail — all four must be present at some stage of life

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