Book with three or more authors. 1  Author's name, et al. 2  Title of the book. 3  Place of publication: Publisher's name, Date of publication. 4  Medium of publication. 5  Only one author name is required.
burÂ·sa faÂ·briÂ·c'iÂ·i. the bursa of Fabricius in poultry, a blind saclike structure located on the posterodorsal wall of the cloaca; it performs a thymuslike function. Synonym(s): bursa of Fabricius. Lymphoid tissue at the junction of the cloaca and the gut in birds, which gives rise to B lymphocytes.arge bursa on the summit of the calcaneus where the superficial digital flexor muscle tendon is partly inserted as it passes distally to the foot; in the horse there may be an additional small subcutaneous bursa over the tendon at this site; its inflammation causes 'capped hock'. cloacal bursa. bursa of Fabricius.
Bursitis is the inflammation or irritation of the bursa. The bursa is a sac filled with lubricating fluid, located between tissues such as bone, muscle, tendons, and skin, that decreases rubbing, friction, and irritation. Bursitis is most often caused by repetitive, minor impact on the area, or from a sudden, more serious injury. Age also plays a role. As tendons age they are able to tolerate stress less, are less elastic, and are easier to tear.