1) Lymphatic capillaries are best described as: a) Thick-walled vessels b) Blind-ended vessels c) Continuous basement membranes d) Arteries carrying lymph 2) Which structural feature allows lymphatic capillaries to absorb interstitial fluid when tissue pressure increases? a) Tight junctions b) Fenestrations c) Anchoring filaments d) Smooth muscle contraction 3) Which statement about lymphatic capillaries is TRUE? a) Found in all tissues b) Thicker wall than blood capillaries c) Lack continuous basement membrane d) Transport blood cells 4) Lymph flows into a lymph node through: a) Efferent vessels b) Lymphatic trunks c) Afferent vessels d) Thoracic duct 5) Most lymph nodes have: a) One afferent, many efferent b) Many afferent, one or two efferent c) Only efferent vessels d) Only afferent vessels 6) What is the primary function of lymph nodes? a) Produce red blood cells b) Store lymph c) Filter lymph, activate immune d) Transport oxygen 7) Which group of lymph nodes is typically the largest and most numerous? a) Cervical b) Axillary c) Inguinal d) Thoracic 8) The correct order of lymph flow is: a) Node → capillary → trunk b) Capillary → afferent → node c) Vein → capillary → node d) Trunk → node → capillary 9) The thoracic duct drains lymph into which vessels? a) Right jugular, subclavian b) Inferior vena cava c) Left jugular, subclavian d) Superior vena cava 10) Which statement about lymph movement is correct? a) Pumped by the heart b) Flows in both directions c) Depends on valves, muscles d) No valves in vessels

Lymphatic System Quiz

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