English: Fig. 59.— Early human embryos, all enlarged about two and a half times (His) : 1-4, from twelfth to fifteenth day (conceptional age); 5, 6, from eighteenth to twenty-first day ; 7, 8, from twenty-third to twenty-fifth day; 9-12, from twenty-seventh to thirtieth day; 13-17, from thirty-first to thirty-fourth day. am, amnion ; uv, umbilical or vitelline vesicle; als, allantoic or abdominal stalk ; c, c', brain-vesicles ; h, heart ; va, visceral arches; o, optic vesicle; ot, otic vesicle; ol, olfactory pit; I, I', upper and lower extremities ; s, somites ; cd, caudal process ; u, primitive umbilical cord.

Title: A text-book of embryology for students of medicine (electronic resource)
Identifier: b21286991 (find matches)
Year: 1907 (1900s)
Authors: Heisler, John Clement; Waterstone, David, former owner; Duke-Elder, Stewart, 1898-1978, former owner; University College, London. Library Services
Subjects: Embryology; Embryology
Publisher: Philadelphia : W. B. Saunders Company
Contributing Library: UCL Library Services, University College London (UCL)
Digitizing Sponsor: Jisc and Wellcome Library

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Text Appearing Before Image:
110 TEXT-BOOK OF EMBRYOLOGY.
Text Appearing After Image:
Fig. 59.—Early human embryos, all enlarged about two and a half times (His): 1-4, from twelfth to fifteenth day; 5, 6, from eighteenth to twenty-first day ; 7, 8, from twenty-third to twenty-fifth day; 9-12, from twenty-seventh to thirtieth day; 13-17, from thirty-first to thirty-fourth day. am, amnion ; uv, umbilical or vitelline vesicle; als, allantoic or abdominal stalk ; c, c', brain-vesicles ; h, heart; va, visceral arches; o, optic vesicle; ot, otic vesicle; ol, olfactory pit; I, I', upper and lower extremities ; s, somites ; erf, caudal process ; u, primitive umbilical cord.

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