Fig. 7

Histological characteristics of the spleens of Bactrian camels. A Histological structures of the spleens of Bactrian camels. Bactrian camel spleens are composed of surface capsules (C), deep parenchyma, and interstitium. The capsule extends into the parenchyma to form trabeculae (T). In the white pulp (WP), there are typical lymphoid nodules (LN) and periarterial lymphatic sheaths (PALS) surrounding the central artery (CA). The marginal zone (MZ) is located at the junction of the white pulp and red pulp, where lymphocytes are sparser than in the white pulp and a larger number of erythrocytes can be seen. The red pulp (RP) is mainly distributed under the capsule, around the trabeculae and outside the marginal zone. It is composed of the splenic cord (SC) and splenic sinus (SS). a-c The partial enlarged images of the white pulp, marginal zone and red pulp of the spleen, respectively. The microscopic magnification of (A) is 10×, and (a-c) is 200×