The practice of surgery . they lie is derived from the deepcervical fascia, and is known as theexternal thyroid capsule. Occa-sionally there exist wandering groups of parathyroid cells or glanduleseven, sometimes outside of the th3roid gland and sometimes within thyroid gland itself lies beneath the suixrficial muscles of theneck,—the platysma, stemomastoids, sternothyroids, etc.,—and isregarded as having two capsules—the loose external capsule of whichI have spoken (which contains the recurrent laryngeal nerve) and thefirm iimer capsule proper, which strips with difficulty and sends pr
The practice of surgery . they lie is derived from the deepcervical fascia, and is known as theexternal thyroid capsule. Occa-sionally there exist wandering groups of parathyroid cells or glanduleseven, sometimes outside of the th3roid gland and sometimes within thyroid gland itself lies beneath the suixrficial muscles of theneck,—the platysma, stemomastoids, sternothyroids, etc.,—and isregarded as having two capsules—the loose external capsule of whichI have spoken (which contains the recurrent laryngeal nerve) and thefirm iimer capsule proper, which strips with difficulty and sends pro-longations between the lobes of the gland. As to the blood- and nerve-supply of the thyroid gland, suffice it to say that there are the twosuperior thyroid arteries and the two inferior thyroid arteries, withoccasionally the thyroidea ima. The veins of the gland spring especiallyfrom the region of the isthmus, are exceptionally large and numerous,and the gland is extremely vascular. The nerves are derived from the. Fig. 393.—The thyroid gland: A, A,The lobes; B, the isthmus; C, the in-constant middle lobe (Campbell). DISEASE OF THE THYROID GLAND 599 superior ganglion of the sym])athetic and from the lar5Tigeal branchesof the pneuniogastric, and they accompany the blood-vessels. Thethyroid is a ductless gland, normally reddish or yellowish red in color,the cut surface finely granular and exuding in considerable amount a col-loidal material—a clear, yellowish, slightly sticky fluid. The gland sub-stance is made up of closed tubules, each containing the colloid material,completely filling the tubules or follicles. The wandering thyroids havea structure like th^t of the thyroid, but the parathyroids have a structurequite different—a thin, connective-tissue capsule sending out fibers intothe substance of the little gland, with a stroma containing blood-vesselsand lymph-vessels, and a protoplasm, either granular or clear. A few words about the functions of the thyroids
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1910
