Sentence Examples with the word Oesophageal

In the failure of previous g, ovary; k, kidney; m, mouth; n, supra morphologists to adapt oesophageal ganglion; nr, nerve ring in the details of developsection.

On account of the shortness of the visceral loop and the proximity of the right visceral ganglion to the oesophageal nerve-ring, the nerve to the osphradium and olfactory ganglion is very long.

The oesophageal orifice is small, and guarded by a strong crescentic or horseshoe-like band of muscular fibres, supposed to be the cause of the difficulty of vomiting in the horse.

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The centres for the antennal nerves form ganglionic swellings on the oesophageal connectives.

There is a welldeveloped brain dorsal, to the mouth; this gives off a pair of oesophageal commissures, which surround the oesophagus and unite in a median ventral nerve-cord which runs between the longitudinal muscles to the posterior end of the body.

The nervous system is represented by an oesophageal collar and a suboesophageal ganglion, whence paired nerves pass outwards to innervate the anterior extremity and backwards towards its posterior end.

In the latter a pallial siphon, a welldeveloped proboscis and an unpaired oesophageal gland are always present, in the former they are usually absent.

The alimentary canal is simple and a gizzard or oesophageal diverticula rarely developed.

As regards their innervation an apparent exception is found in the case of A pus, where the nerves to the antennules arise, behind the brain, from the oesophageal commissures, but this is, no doubt, a secondary condition, and the nerve-fibres have been traced forwards to centres within the brain.

Commonly among the terrestrial forms there is a gizzard, or two gizzards, or a larger number, in the oesophageal region.