Q: The lymphatic circulation begins with blind ending (closed at one end) highly permeable superficial lymph capillaries, formed by endothelial cells with button-like junctions between them that allow fluid to pass through them when the interstitial pressure is sufficiently high. These button-like junctions consist of protein filaments like platelet endothelial cell adhesion molecule-1, or PECAM-1. A valve system in place here prevents the absorbed lymph from leaking back into the ISF. There is another system of semilunar (semi = half; lunar = related to the Moon) valves that prevents back-flow of lymph along the lumen of the vessel. Lymph capillaries have many interconnections (anastomoses) between them and form a very fine network.

Answer this question: structure that prevents backflow of fluid in lymphatic vessels?
A: semilunar ( semi = half ; lunar = related to the Moon ) valves. How to explain the answer? The relevant information is: There is another system of semilunar (semi = half; lunar = related to the Moon) valves that prevents back-flow of lymph along the lumen of the vessel.

Q: Passage: In the confession, Justice Wargrave writes that he has long wished to set an unsolvable puzzle of murder. His victims would be of his choosing, as they were not found guilty in a trial. He explains how he tricked Dr Armstrong into helping him fake his own death under the pretext that it would help the group identify the killer. He also explains that he replaced the chair in Vera's room. Finally, he reveals how he used the gun and some elastic to ensure his own death matched the account in the guests' diaries. Although he wished to create an unsolvable mystery, he acknowledges in the missive a "pitiful human need" for recognition, hence the confession.

Question: Based on this passage, who was the murderer in and then there were none movie?
A: Justice Wargrave. How to explain the answer? To answer the above question, the relevant sentence is: In the confession, Justice Wargrave writes that he has long wished to set an unsolvable puzzle of murder.

Q: Apache, IIS and Nginx are the most used web servers on the Internet.

What is an example of a web server?
A: Apache , IIS and Nginx. How to explain the answer? To answer this question, we should know that: Apache, IIS and Nginx are the most used web servers on the Internet.

Q: Passage: Mahatma Mohandas Karamchand Gandhi (/ ndi, n-/; Hindustani: ( mondas krmtnd andi) (listen); 2 October 1869 -- 30 January 1948 ) was an Indian activist who was the leader of the Indian independence movement against British rule. Employing nonviolent civil disobedience, Gandhi led India to independence and inspired movements for civil rights and freedom across the world. The honorific Mahatma (Sanskrit: "high-souled", "venerable") -- applied to him first in 1914 in South Africa -- is now used worldwide. In India, he is also called Bapu (Gujarati: endearment for father, papa) and Gandhi ji. He is unofficially called the Father of the Nation.

Question: Based on this passage, who is known as the father of our nation?
A:
Mahatma Mohandas Karamchand Gandhi. How to explain the answer? This is the relevant information: He is unofficially called the Father of the Nation.