Question

question 18 1 pts which of the following is a true statement? the wall of the lymphatic capillary consists of a multiple layer of flattened endothelial cells. lymphatic and blood capillary networks are dependent on each other. lymph from the entire body, except the upper right quadrant, drains eventually into the thoracic duct. the thoracic duct is approximately the same size as the large veins. question 19 1 pts because t cells attack pathogens more directly, t - cell immune mechanisms are classified as ______ immunity. antibody - mediated cell - mediated nonspecific none of the above are correct.

Explanation:

• For Question 18:
• Lymphatic capillary walls have a single layer of endothelial cells, not multiple.
• Lymphatic and blood capillary networks are independent.
• The thoracic duct is much smaller than large veins.
• Lymph from most of the body (except the upper right quadrant) drains into the thoracic duct.
• For Question 19:
• T - cell immune mechanisms are cell - mediated immunity. Antibody - mediated immunity is related to B cells. Nonspecific immunity is the first line of defense (e.g., physical barriers).

Answer:

Question 18: Lymph from the entire body, except the upper right quadrant, drains eventually into the thoracic duct.
Question 19: cell - mediated.