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abdomen

Coenobita Gills

2015-03-15
In: Biology
Tagged: abdomen, abdominal lung, anatomy, body, body parts, breathing, coenobita, gills, hermit crab, hermit crab care

The gills of Coenobita and Birgus are modified for air-breathing but are reduced in number and size and have a comparatively small surface area. The branchiostegal lungs of Coenobita (which live in gastropod shells) are very small but are well vascularized and have a thin blood/gas barrier. Coenobita has developed a third respiratory organ, the abdominal lung, that is formed from highly vascularized patches of very thin and intensely-folded dorsal integument. Oxygenated blood from this respiratory surface is returned to the pericardial sinus via the gills (in parallel to the branchiostegal circulation). Birgus, which does not inhabit a gastropod shell, has developed a highly complexRead More →

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Coenobita Abdominal Appendages

2015-03-15
In: Biology
Tagged: abdomen, anatomy, appendages, body, body parts, coenobita, hermit crab, hermit crab care, pleopods, telson, uropods

The abdominal appendages of the land hermit crab include the thoracic appendages, pleopods, uropods and telson [1]. The thoracic appendages are used for cleaning the gills, gripping the shell, gripping a mate during copulation. The pleopods are used for brooding eggs. At the end of the pleon is the tail fan, comprising a pair of biramous uropods and the telson, which bears the anus. Together, they are used for steering while swimming, and in the caridoid escape reaction. We are building image galleries of specific body parts. If you have high resolution, clear photos that you would like to donate to this project please contactRead More →

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