1. Tardigrade
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  4. Respiratory organs like gills, book gills, book lungs or tracheal system are found in phylum:

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Q. Respiratory organs like gills, book gills, book lungs or tracheal system are found in phylum:

NTA AbhyasNTA Abhyas 2022

Solution:

The salient features of phylum Arthropoda are:
  • They have an organ-system level of organization.
  • They are bilaterally symmetrical, triploblastic, segmented, and coelomate animals.
  • The body of arthropods is covered by a chitinous exoskeleton. The body consists of a head, thorax, and abdomen.
  • They have jointed appendages (arthros-joint, poda-appendages).
  • Respiratory organs are gills, book gills, book lungs, or tracheal system.
  • The circulatory system is of open type.
  • Sensory organs like antennae, eyes (compound and simple), statocysts, or balancing organs are present.
  • Excretion takes place through malpighian tubules.