Remember, this will be the only way you will know what answers you marked on the scantron. Each question has only 1 correct answer. Indicate your choice on the answer sheet - scantron. If you are stumped by a question, place a mark by it, and return to it later. T lymphocyte 1.
Lymphatic nodules are the building units of larger lymphatic organs.
Lymph a. is identical with plasma. The spleen a. filters pathogens out of lymph. E. coli travels from our food into a person. Rabies can infect humans or dogs or cats. Infectious diseases are a. decreasing in frequency in the U.S. b. decreasing in frequency everywhere.