White blood cells, or _______, are specialized to protect the body against harmful bacteria and other microorganisms that cause disease.
A) lymphocytes
B) leukocytes
C) erythrocytes
D) platelets
Correct Answer:
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Q1: Cardiac muscle fibers are joined at their
Q2: _ is the red pigment that transports
Q3: The _, the inner layer of the
Q4: The heart has its own specialized _
Q5: Each heartbeat is initiated by the _.
A)
Q7: The _ pump(s) blood into the great
Q8: Two _ arteries branch off from the
Q9: _ is the process by which cells
Q10: People with type _ blood are known
Q11: The outer layer of the heart wall
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