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Which of the following components of blood are responsible for protecting the body against invaders/immune system?   

Which of the following statements is not true.

Which substances are necessary for proper coagulation?

Collects blood from the pelvic muscles and organs:

A neutrophil:

Blood flows from the pulmonary veins into the:

Which of the following is NOT true regarding hemoglobin? 

Which of the following is the thickest layer of the heart wall?

Which of the following is NOT a function or characteristic of capillaries?

Atrial __________ is to atrial relaxation as atrial __________ is to atrial contraction.