. The anatomical record. Anatomy; Anatomy. Feb. 29, '08. The Anatomical Record 221 present, and this lias also been my experience in the various mammals that I have studied. Figs. 5 and 8 represent this form in the cat, in which animal it reaches its acme. It will be noted that there is a more or less eccentrically placed mass of condensed granular cytoplasm con- taining tlie nucleus, while the peripheral portion of the cell is extensively vacuolated. So marked is this arrangement that v. Lenhossek has used in connection with it the terms commonly applied to amoebae, and speaks of endoplasm an
. The anatomical record. Anatomy; Anatomy. Feb. 29, '08. The Anatomical Record 221 present, and this lias also been my experience in the various mammals that I have studied. Figs. 5 and 8 represent this form in the cat, in which animal it reaches its acme. It will be noted that there is a more or less eccentrically placed mass of condensed granular cytoplasm con- taining tlie nucleus, while the peripheral portion of the cell is extensively vacuolated. So marked is this arrangement that v. Lenhossek has used in connection with it the terms commonly applied to amoebae, and speaks of endoplasm and ectoplasm. By no means all of the cells have this typical structure, but all gradations are found from cells whose bodies are composed entirely of " endoplasm," to those in which it is reduced to a remnant in the immediate vicinity of the nucleus. Plato regards these vacuolated forms as old cells, the opposite extreme being youthful forms; while Ganfini thinks that this appearance is a secretory phenomenon con- nected with the production of fat. The analogy with what has been. Fig. 8. A small group of interstitial cells from the cat's testis showing granules. Preparation stained with neutral gentian. X about 800. observed in various gland cells is certainly very suggestive of secretory function; but, for reasons which will appear later, I fell sure that the activity of the cells is not limited to the formation of fat. It should be stated that the vacuoles are not always so smooth and regularly circular as those shown in the illustration; frequently they are large, irregularly- shaped cavities with more or less ragged margins, doubtless the result of the breaking down of the partitions between adjacent vacuoles. It is hardlv necessary to add that the demonstration of the structure of the interstita cells requires fresh tissue and good fixation. The nucleus is relatively large, and contains much nuclear sap with a large nucleolus. It is almost ahvays eccentric in posi
Size: 1824px × 1369px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
