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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ... (9) investigated the development of the carotid body in the pig, and reported that it is not of epithelial origin. It is formed in the outer coat of the carotid artery, and is intimately related to the neighbouring nervous ganglia. Marchand (13) describes the development of the carotid body in the human subject, and, as to the general nature of the organ, held opinions very similar to those of Arnold. He suggests the name "nodulus caroticus," and'considers the body in question to be a rudimentary organ. Stilling (23) made the important discovery that the carotid body contains some cells which stain brown with potassium bichromate. This observation was confirmed by Kohn (10), who has added to the long list of names attached to this tiny body, by suggesting that it be called the " paraganglion intercaroticum." Comjxirative Anatomy and Embryology. In the human subject the carotid glands are small bodies situated just above the bifurcation of the common carotid artery on each side, and between its internal and external branches. According to Luschka (11), the gland is of an elongated spherical shape, 5 to 7 millimetres long, 4 to 2 millimetres broad, and 1 millimetres thick. Sometimes it is divided into two or more nodules. The body is greyish or brownish-red in colour. Its consistence is more compact than that of a nerve ganglion, and its substance cannot be easily teased out with needles. In all, or in nearly all mammals so far investigated, the carotid body has been found in the neighbourhood of the bifurcation of the common carotid artery, either exactly at the bifurcation or somewhat higher up in the connective tissue between the internal and external carotid arteries. Both these and the common carotid may give twigs to the body....
