Most of the lymphocytes in the circulation would be classified as what?
A. T lymphocytes
B. B lymphocytes
C. Neither T nor B lymphocytes (natural killer cells, also called NK cells)
D. Macrophages
E. Mast cells
Question 2
Choose the answer below that best completes following statement: An organ is __________.
A. an object within the abdominal cavity that processes food, water, and air.
B. a complex structure that evolves from a single cell.
C. a group of different tissues integrated to perform a specific function.
D. a collection of similar cells that have an identical function.