Читать книгу Blackwell's Five-Minute Veterinary Consult: Reptile and Amphibian - Javier G. Nevarez - Страница 52

The blood of amphibians is composed of erythrocytes, thrombocytes, monocytes, lymphocytes, eosinophils, basophils, and neutrophils. Morphology of the white blood cells can be quite variable, so obtaining accurate white cell counts can be challenging when working with laboratories not familiar with their cell morphology. Their function is presumed to be similar to other species, but further research is still needed in this area.

Some amphibians lack a truly functional bone marrow, so hematopoiesis can occur in the spleen, liver, and kidneys, according to age and species. The spleen is composed of a red pulp responsible for erythropoiesis and white pulp responsible for myelopoiesis. The thymus produces T‐lymphocytes and is functional through life. The size of the spleen and thymus are affected by seasons, nutritional status, and stress. A well‐developed gut associated lymphoid tissue is present instead of lymph nodes.