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Explain why capillaries are the most important blood vessels in the body.
Q3: Explain the process of gas exchange in
Q27: B cells reach maturity in the thymus.
Q77: The main difference between active and passive
Q104: The size of lymph nodes range between
Q119: A person with enlarged pharyngeal tonsils would
Q126: Explain the functioning of a steroid hormone.
Q176: The mature red blood cell contains fewer
Q191: Substances called "tissue hormones"<br>A)Endocrine gland<br>B)Exocrine gland<br>C)Steroid hormone<br>D)Nonsteroid
Q204: The heart is located in the mediastinum.
Q205: Explain how the circulatory system helps to