In a 3-year-old sheep most leukocyte production takes place in the

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In adult mammals, including sheep, the primary site of leukocyte production is the red bone marrow, which produces all types of blood cells including leukocytes. The liver plays a role in the production of some immune cells, but this is not the primary site of leukocyte production. The spleen filters blood and removes old red blood cells and pathogens, but does not produce leukocytes. Yellow bone marrow, found in some bones of adult mammals, is primarily involved in fat storage and does not play a role in leukocyte production.

In a 3-Year-Old Sheep Most Leukocyte Production Takes Place in the