The thymus, spleen, and tonsils are principal organs of the ________ system.

A. respiratory
B. muscular
C. lymphatic
D. endocrine
E. circulatory


Answer: C

Anatomy & Physiology

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Blood that is transported to and from all of the tissues of the body with the exception of the lungs is in the

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Cells of muscle tissue are called ______ _______

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