The dorsal lip bears two minute double papillae where as single papillae are called amphid. The amphidas are probably chemoreceptors , while the other sensory papillae are perhaps tangoreceptors. The posterior end of the male bears ventral 50 pairs of per-anal papillae in front of the cloacal aperture and 5 pairs of postanal anal papillae . The first two pairs of post-anal papillae are double. These papillae of the male help in copulation.Friday 7 September 2012
PAPILLAE-ASCARIS
The dorsal lip bears two minute double papillae where as single papillae are called amphid. The amphidas are probably chemoreceptors , while the other sensory papillae are perhaps tangoreceptors. The posterior end of the male bears ventral 50 pairs of per-anal papillae in front of the cloacal aperture and 5 pairs of postanal anal papillae . The first two pairs of post-anal papillae are double. These papillae of the male help in copulation.
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