Lymphatic Pathways Begin As

Question: Lymphatic pathways begin as ____ that merge to form lymphatic vessels.

Answer: lymphatic capillaries

Question: The wall of a lymphatic capillary consists of a single layer of ____.

Answer: squamous epithelial

Question: Once tissue (interstitial) fluid is inside a lymphatic capillary, the fluid is called ____.

Answer: lymph

Question: Lymphatic vessels have walls similar to those of ____ but thinner.

Answer: veins

Question: Lymphatic vessels contain ____ that help prevent the backflow of lymph.

Answer: semilunar valves

Question: Lymphatic vessels usually lead to lymph ____ that filter the fluid being transported.

Answer: nodes

Question: The lymphatic trunk that drains the abdominal viscera is called the ____ trunk.

Answer: intestinal

Question: The lymphatic trunk that drains the head and neck is called the ____ trunk.

Answer: jugular

Question: The ____ is the larger and longer of the two lymphatic collecting ducts.

Answer: thoracic duct

Question: Lymph nodes contain large numbers of white blood cells called ____ and macrophages that fight invading microorganisms.

Answer: lymphocytes