26- HISTOMORPHOLOGY OF HAEMOLYMPH NODES OF WATER DEER (HYDROPOTES INERMIS ARGYROPUS): NOVEL STUDY

Abstract

The objective of the present work was to investigate the anatomical andhistological structures of haemolymph nodes in the adult water deer (Hydropotesinermis argyropus). Methodology: the morphology of haemolymph nodes from 5adult water deer was studied by gross inspection and by histological methods.Results: the haemolymph nodes were determined for the first time in water deer(Hydropotes inermis argyropus). The nodes located in the neck on the trachea,thoracic and abdominal cavities in water deer. Dark red in color and oval- or roundshaped haemolymph nodes in water deer were observed particularly along theabdominal aorta and caudal vena cava; as well as on the trachea along the jugularvein, on the internal carotid artery and internal jugular vein and on the aortic arch.These nodes had a hilus with hilar vessels, which entered the haemolymph nodesthrough the trabeculae as trabecular artery. The parenchyma was organized in theform of cortex and medulla. Lymphoid rim was located between subcapsular sinusand cortex. The cortex was composed of a many secondary lymphoid follicles anddiffuses interfollicular lymphoid tissue, and medulla contained medullary cords andmedullary sinuses. A reticular meshwork extended throughout the haemolymphnodes formed the structure backbone. The interstices of the reticular meshwork werefilled with free blood cells, many macrophages, lymphocytes, and plasma cells.Conclusion: the dark red haemolymph nodes of water deer examined were seenalong the course of large blood vessels in the neck on the trachea, thoracic andabdominal cavities. This is first study has demonstrated the presence of haemolymph nodes in water deer (Hydropotes inermis argyropus) and provided essentialinformation on their anatomical and histological structures. The data obtained in thepresent study may be used for further research in this field