1. Which of the following is not directly associated with the lymphatic pathway? Lymphatic trunk  Collecting duct  Subclavian vein  Carotid arteries 2. The thymus is responsible for secreting _____ from epithelial cells. Thymosin  Growth hormone  Macrophages  Plasma cells 3. Which of the following types of cytokines is responsible for the growth and maturation of B … Continue reading Lymphatic System Practice Test