Des conférences sur l'anatomie et physiologie de l'animaux invertébrés : livrés au Royal College of Surgeons . transmettre une smalltubulus ; une voie cutanée aliforme près de la production même extremitydetermined les vers en question à appartiennent au genre spiro-ptera. Je le plus formidable, mais, heureusement, la plus rare de l'nematoidparasites de l'homme, l'Strongylus gigas, aussi urinarysystem sont attaquées, mais n'est développé dans les reins, où il atteint hns lalongueur de trois pieds, avec un diamètre de un demi pouce ; occasionnant sup-puration et destructrice que l'absorption de glandulaire important ou

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Lectures on the comparative anatomy and physiology of the invertebrate animals : delivered at the Royal College of Surgeons . mitting a smalltubulus; a dermal aliform production near the same extremitydetermined the worms in question to belong to the genus Spiro-ptera. I The most formidable, but, happily, the rarest of the nematoidparasites of man, the Strongylus gigas, also infests the urinarysystem, but is developed in the kidney, where it hns attained thelength of three feet, with a diameter of half an inch ; occasioning sup-puration and destructive absorption of that important glandular organ. The male ijig 44.) of this species is less than the female, and isslightly attenuated at both extremities. The head («) is obtuse, themouth orbicular, and surrounded by six hemispherical papillae; thebody is slightly marked with circular striae, and with two longi-tudinal impressions; the tail is incurved in the male, and terminatedby a dilated pouch or bursa, from the base of which the single intro-mittent spiculum {g) projects. In the female the caudal extremity * Vol. ii. p. 385. t XLVII. r- 251. 98 LECTURE VI.. lii is less attenuated and straighter, with the anus a little below the apex ;the vulva is situated at a short distance from the anterior extremity.The Strongylus gigas is not confined to the human subject, butmore frequently infests the kidney of the dog, wolf, otter, racoon, glutton, horse, and ox. It is generallyof a dark blood-colour, which seems to be owing tothe nature of its food, which is derived from thevessels of the kidney; as, where suppuration has takenplace, the worm has been found of a whitish hue. The round-worm (Ascaris lumbricoides Linn.){Jig. 46.) is perhaps the most anciently known* andcommon of the human Entozoa, and is that which hasbeen subjected to the most repeated, minute, andsuccessful anatomical examinations. It is found inthe intestines of man, the hog, and the ox. In thehuman subject the round worms are much morecommon in children t

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• bookauthorowenrichard18041892
• bookcentury1800
• bookdecade1850