what are the respiratory structure of limulos and palaemus respiratory
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book gills and book lungs......
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Explanation:
Book gills
Both are considered appendages because book lungs develop from limb buds before the buds flatten into segmented lamellae. Book gills are still present in the marine arthropod Limulus (horseshoe crabs) which have five pairs of them, the flap in front of them being the genital operculum which lacks gills.
Palaemon takes up oxygen dissolved in sea-water. Its respiratory organs are inner lining of branchiostegites, epipodites (mastigobranchiae) and branchiae (gills). lateral wall of the thorax and thoracic appendages.
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