20. The Lymphatic System
Lymphatic Vasculature
Multiple Choice
Multiple ChoiceHow are collecting lymphatic vessels different from veins?
A
Collecting lymphatic vessels have fewer tunics than do veins.
B
Collecting lymphatic vessels have thicker walls than do veins.
C
Collecting lymphatic vessels have more internal valves than do veins.
D
Collecting lymphatic vessels do not form branches (anastomoses); veins do form branches.
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