Beginner Thoracic Duct Quiz

Q1. What is the thoracic duct?

• A sympathetic nerve
• A branch of the abdominal aorta
• A tributary of the portal vein
• The largest lymphatic vessel in the body

Q2. Where does the thoracic duct commonly begin?

• Inside the liver
• At the carotid bifurcation
• At the femoral canal
• At the cisterna chyli or converging upper abdominal lymphatics

Q3. At approximately which vertebral level is the cisterna chyli commonly found?

• L1 to L2
• C1 to C2
• T1 to T2
• S4 to S5

Q4. Through which diaphragmatic opening does the thoracic duct usually enter the thorax?

• Aortic hiatus
• Esophageal hiatus
• Obturator canal
• Caval opening

Q5. Which lymphatic trunks commonly contribute to the thoracic duct near its abdominal origin?

• Lumbar and intestinal trunks
• Jugular trunks only
• Bronchomediastinal trunks only
• Subclavian trunks only

Q6. Which part of the body is NOT normally drained by the thoracic duct?

• Right upper quadrant
• Both lower limbs
• Abdomen
• Left upper limb

Q7. Where does the thoracic duct usually terminate?

• Inferior vena cava
• Portal vein
• Left venous angle
• Right atrium

Q8. Which lower-body regions send lymph into the thoracic duct?

• Scalp only
• Right upper limb only
• Right side of the thorax only
• Both lower limbs and much of the pelvis and abdomen

Q9. What type of lymph may give the thoracic duct a milky appearance after a fatty meal?

• Synovial fluid
• Cerebrospinal fluid
• Bile
• Chyle

Q10. Which statement best describes the drainage territory of the thoracic duct?

• It drains only the right upper quadrant
• It drains only the lower limbs
• It drains most of the body except the right upper quadrant
• It drains only the abdomen