Tube within tube body plan is shown by
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Tube - within - tube body plan is shown by phylum Annelida. These are the characteristics of Annelida: Free-living, terrestrial or aquatic form (freshwater or marine). The body is long, cylindrical and metamerically segmented.
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Tube - within - tube body plan is shown by phylum Annelida.
These are the characteristics of Annelida:
Free-living, terrestrial or aquatic form (freshwater or marine).
The body is long, cylindrical and metamerically segmented.
Body wall consists of the cuticle, epidermis and musculature.
The body cavity is a true coelom, lined by epithelium.
The digestive system is complete.
Respiration is either through the skin or through gills.
Excretion with the help of characteristic nephridia.
The presence of a circulatory system (closed type). Hemoglobin dissolved directly in the plasma.
The nervous system consists of a nerve ring and a double ventral nerve cord with segmental ganglia.
Locomotion with the help of setae or parapodia.
Reproduction by sexual methods. Either unisexual or bisexual development may be direct or indirect.
The body has a true coelom.
Explanation:
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