. The American journal of anatomy. erc(>llul:ir layerof the membrane and syn-cytium of the diiposition zoneshow the enormous numbersof flbi-ils that are being laidon the surface of the alveolusas it grows out into the gland-ular framework. Fixed inZ(!nk(n-s fluid. Stained byMallorys method. Magnified!H)0 diiimeters. Joseph Marshall Flint 7 clei of the syncytium are less numerous but still show the concentricarrangement about the growing buds, suggesting the continuance of thestress which, exerted in the younger stages, undoubtedly caused themto take this position. In the
. The American journal of anatomy. erc(>llul:ir layerof the membrane and syn-cytium of the diiposition zoneshow the enormous numbersof flbi-ils that are being laidon the surface of the alveolusas it grows out into the gland-ular framework. Fixed inZ(!nk(n-s fluid. Stained byMallorys method. Magnified!H)0 diiimeters. Joseph Marshall Flint 7 clei of the syncytium are less numerous but still show the concentricarrangement about the growing buds, suggesting the continuance of thestress which, exerted in the younger stages, undoubtedly caused themto take this position. In the general syncytium the amount of exo-plasm has markedly increased. The fibrils are branched and distinct,but of unequal size, the latter characteristic being most obvious in thosebounding the little lacunae in the interstices of the syncjrtium. In a pig 12-| cm. in length the basement membranes are very shatplyand deeply stained and show numerous fibrillar connections with the f^^S^^- <?? J^ /Jr. $;-!L^r<-^^^^ ^^ t^H&. i\ ? :: / W4x^. Fig. 5. Fig. 4. Alveolus from submaxillary gland of an embryo pig 12K cm. long,showing the gathering of the exoplasm into fasciculi and increase in the size andnumber of the lacunar spaces. The dots represent partly fibrils cut in cross-sectionand partly granules of endoplasm situated on the fibrils. Fixed in Zenkers by Mallorys method. Magnified 900 diameters. Fig. 5. Alveoli from submaxillary gland of pigs embryo 16 cm. long, showingthe fasciculi and the irregular direction of the exoplasm and nuclei caused by thedifferent forces exerted by the growing alveoli. Stained by Mallorys method, afterZenkers fluid. Magnified 900 diameters. adjacent syncytium of the deposition zone. The anastomosing mass offibrils now stands out with greater distinctness owing to the compactfascicular arrangement, a fact emphasized by interstitial lacunae whichincrease proportionally as the exoplasmic fibrils are gathered intobundles or fasciculi that
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
