Essman, Richard A.

2 publications

Bazzini, Maria D.; Reynolds, John E., III; Essman, Richard A. (detail)
1984Hemopoiesis in the West Indian manatee, Trichechus manatus. [Abstr.]
Florida Scientist 47(Suppl. 1): 19.
—The vertebral bodies were found to be the primary site of hemopoiesis.
Bazzini, Maria D.; Reynolds, John E., III; Essman, Richard A. (detail)
1986Erythropoiesis and granulopoiesis in the West Indian manatee, Trichechus manatus (Mammalia: Sirenia).
Acta Anat. 126(3): 150-152. 2 figs.
—Concludes from the presence of erythroblasts, megakaryocytes, and myelocytes in the vertebral bodies that the latter are the main site of blood cell formation. Some developing blood cells were also found (rarely) in manatee livers, spleens, and kidneys. Notes the abundance of lymphatic tissue, especially mesenteric lymph nodes, in the manatee.