. The American journal of anatomy. these same arteries in theleft testis of an embryo pig of 210 mm. X 9. in order to penetrate to the center are of necessity twisted back uponthemselves in supplying the rapidly growing tubules whose developmentmust be toward the circumference. The mediastinum is in the centerof the gland and hence the tubules in developing radiate from this as acenter. The Blood Stipphj to tlie AJhuginca—Tlie vascular supply to the albu-ginea is shown in Fig. 14. Above the large capsular arterial branches and veins which supply the 458 Development and Vascularization of the T
. The American journal of anatomy. these same arteries in theleft testis of an embryo pig of 210 mm. X 9. in order to penetrate to the center are of necessity twisted back uponthemselves in supplying the rapidly growing tubules whose developmentmust be toward the circumference. The mediastinum is in the centerof the gland and hence the tubules in developing radiate from this as acenter. The Blood Stipphj to tlie AJhuginca—Tlie vascular supply to the albu-ginea is shown in Fig. 14. Above the large capsular arterial branches and veins which supply the 458 Development and Vascularization of the Testis glandular tissue of the testis and which lie on the inner side of thetunica albuginea, is found a delicate plexus of small arteries, capillariesand veins grouped in irregular polyhedral forms, mostly of four or fivesides, having an area of from nine to sixteen square millimeters. Thearteries enclosing these polyhedrons spring from the encircling capsularbranches and lie external to them. These small vessels are usually ac-. FiG. 14. A cleared specimen of the tunica albuginea of the testis of anadult pig, showing the arrangement of the vessels supplying this tunic. X specimen was studied in glycerine with a magnification of 80 diameters(Leitz) for the capillaries of the individual lobules, and with a magnificationof 8 diameters for the arrangement of the lobules. Drawn with camera , one of the tortuous capsular arteries given off from the main capsularartery. These vessels lie below the small arteries supplying the , an encircling capsular vein which ultimately empties into the pampiniformplexus. These veins also lie beneath the arteries and veins supplying thealbuginea and also pass under the large capsular arteries. C, a smallartery arising from a capsular artery. D, a small vein emptying into a cap-sular vein. The arrows indicate the course of the blood stream. companied by vengR comites which carry back tlie blood to the encirclingveins. Ea
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
