A system of obstetrics . eformity known as hare-lip, from the failure of the processesto unite, but as union is alwaysperfect before the end of the sec-ond month, the arrest of develop-ment that results in this deform-ity must have taken place at someperiod prior to the third month—a point to which Parvinl has partic-ularly called attention. During thesecond month from the growth ofthe viscera the body becomes some-what straightened out, and from thedevelopment of the brain the headincreases in size. The umbilicalvesicle atrophies, and may be foundattached to the body by a slenderpedicle. The
A system of obstetrics . eformity known as hare-lip, from the failure of the processesto unite, but as union is alwaysperfect before the end of the sec-ond month, the arrest of develop-ment that results in this deform-ity must have taken place at someperiod prior to the third month—a point to which Parvinl has partic-ularly called attention. During thesecond month from the growth ofthe viscera the body becomes some-what straightened out, and from thedevelopment of the brain the headincreases in size. The umbilicalvesicle atrophies, and may be foundattached to the body by a slenderpedicle. The umbilical ring issomewhat contracted, but still con-tains a few loops of intestine, so thatif at this time an arrest in the de-velopment of the abdominal wallsshould occur, a bad umbilical hernia r, superior maxillary process of the or exomphalllS might be the arch: 1, 2. 3. and 4, the four ?f ° . , The umbilical cord runs straight tothe periphery of the ovum. Theeves occupy a position on the side of. Scheme of a Human Embryo, with the visceral arches still persistent: -1, amnion; Vfore-brain; M, mid-brain; H, hind-brainN, after-brain; U, primitive vertebrae; aeye ; P, nasal pits ; S, frontal process ; y, internal nasal process: n, external nasal pro-first visceral arches, with the visceral cleftsbetween them: o, auditory vesicle; h,heart, with e. primitive aorta, which di-vides into five aortic branches ; /. descend- ing aorta : om, omphalo-mesenteric arterv; . the the head; behind them may be seen vein : L. liver, with arriving and departingveins : D, intestine ; i, inferior cava : T. coc-cyx : (iU. allantois, with z, one umbilicalartery, and x, an umbilical vein. b, the omphalo-mesenteric arteries on umbilical vesicle: r. omphalo-mesenteric t]ie ear^ an(| m front arises the ex-ternal nose. The limbs are sepa-rated into their three divisions, andthe first suggestions of hands andith the fingers and toes webbed. The Wolffianbodies are much lessened in size,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
