File:The American journal of anatomy (1920) (14770989305).jpg

Identifier: americanjournalo27wist (find matches)
Title: The American journal of anatomy
Year: 1920 (1920s)
Authors: Wistar Institute of Anatomy and Biology Association of American Anatomists
Subjects: Anatomy Anatomy
Publisher: Baltimore, MD : (s.n.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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ures 16 and 17. Figure 24 is also comparable to figure18, and represents a variety of tliis type of nucleus. 25 Multinucleated giant-cell from the enamel pulp of a new-born cat. Thesecells are formed by the fusion of originally discrete, mononucleated cells of theenamel organ. They may contain glo))ules of resorbed enamel. The cytoplasmis acidophilic in staining reaction. Zenker fi.xation; hematoxylin and eosin stains. 26 Early stage in the disintegration of these enamel giant-cells. The chro-matin of the nuclei collects in several peripheral crescentic masses and occa-sional si)herical or elongated droplets. The nuclei become pale, their membraneeventually ruptures, and the chromatic masses are cast out into the cytoplasm ofthe disintegrating cells where they simulate prophase chromosomes. 27 Late stage in the disintegration process. The chromatic masses ((chromo-some sinmlacra) eventually dissolve within the fragmenting cytoplasm. 312 GIANT-CELLS OF BONE-MAR HOW H. E. JORDAN PLATE 1
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313 Resumen por el autor, Chikanosuke Ogawa. Las finas ramificaciones del pulmon humano. Los conductos alveolares del pulmon adulto del hombre fueronestudiados por el autor por medio de reconstrucciones. Los con-ductos alveolares se dividen dos a nueve veces antes de alcanzarlos sacos aereos. Como tipo de ramificaci6n se encuentran lamonopodia y la dicotomia. Los pianos divergentes de los con-ductos frecuentemente se cruzan entre si. Se ramifican en su-cesi6n frecuente, y la disminuci6n de su diametro no se aclisa.La regla de Justesen no puede aplicarse al caso del pulmon hu-mano adulto. El numero de alveolos contenidos en un sacoaereo varfa entre cinco y veinte. El atrio de Miller es un ter-mino innecesario, por lo menos en el caso del pulmon humano.Las paredes alveolares (distintas de las de la base) eston gene-ralmente formadas por la pared saliente de los conductos alveo-lares y los tabiques alveolares. Translation by .Ios6 V. NonidczCornell University Medical College, N. Y. AUtHO

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