Which of the following statements regarding lymphatic vessels is not true?
A) The smallest lymphatic vessels are called lymphatic capillaries.
B) The thoracic duct drains the right arm and right side of the neck and chest.
C) Lymphatic vessels have valves to ensure forward movement of lymph.
D) There are only two large lymphatic ducts, the right lymphatic duct and the thoracic duct.
B
Explanation: The thoracic duct drains lymph from everywhere except the right arm and the right side of the neck and chest. The other statements regarding lymphatic vessels are true.
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