. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Fig. Second stage of deeelopement of primary tube forming follicles. (After Simon.) out of the primary tube does not occur simul- taneously at every part, or uniformly, but chiefly at those situations which are ulti- mately to attain the largest size; thus in the foetal calf we find tolerably v/ell developed bulgings of the primary tube opposite the angle of the jaw, the upper part of the trachea, and the pericardium, while the intervening portions have smooth and undulated margins ; and it is just the parts of the
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Fig. Second stage of deeelopement of primary tube forming follicles. (After Simon.) out of the primary tube does not occur simul- taneously at every part, or uniformly, but chiefly at those situations which are ulti- mately to attain the largest size; thus in the foetal calf we find tolerably v/ell developed bulgings of the primary tube opposite the angle of the jaw, the upper part of the trachea, and the pericardium, while the intervening portions have smooth and undulated margins ; and it is just the parts of the gland corre- sponding to the above points, which ulti- mately attain the greatest magnitude. The third stage of developement consists in the ramification of the follicles which have budded out from the central cavity; — they do not usually elongate much, before they throw off fresh offsets, and these are completely sessile, so that they have the appearance of vesicles or imperfect spheres grouped together : the mode in which the primary offset divides is either dichotomous or quaternary (fgs. 727. and 728.), probably also often with some degree of irregularity and inequality in the size of contiguous offsets. By the extension Figs. 727, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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