Answer:
A) central
Explanation:
The lymphatic system plays a major role in specific immune responses. The lymphatic system is composed of lymph, lymphatic vessels, and lymphatic organs (bone marrow, thymus, lymph nodes, spleen, etc). These lymphatic organs help to produce and repair immune cells including lymphocytes (T cells and B cells), monocytes, and plasma cells that generate antibodies against specific pathogens. The lymphatic organs can be classified into 1-primary (central) lymphoid organs, i.e., bone marrow and thymus, that produce lymphocytes and 2-secondary lymphoid organs, i.e., spleen, lymph nodes, and tonsils, that filter out and destroy undesired pathogens. The central lymphoid organs are sites where lymphocytes can divide and proliferate.
The city known to have the most fountains in the world, while also employing bacteria to preserve them, is the city of Rome in Italy.
The city of Rome has an estimated 2000 water fountains. During the times of ancient Rome, these fountains played a crucial role in the sustainability of the city, given that they were <u>the only source of public potable water available</u>. Private drinking water was a luxury reserved for the wealthy.
Currently, some scientists in Rome are employing the use of bacteria to aid in preserving these mounuments. They use<u> enzymes </u>to draw out the bacteria deep inside some marble blocks, then allow it to calcify on the surface, thus adding <u>structural strength to the stone</u>. They are also using specialized strains of bacteria to eat away at grease and grime on some of the fountains.
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No, it does not affect the work of health scientists.
The answer is experience.
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Ruptured Esophageal Varices
- Swallowing difficulty is the inability to swallow foods or liquids with ease.
- People who have a hard time swallowing may choke on their food or liquid when trying to swallow.
- Dysphagia is the medical name for difficulty swallowing.
- Dysphagia affects about 15 million people in the United States. About 1 in 25 people will experience dysphagia in their lives.
- Difficulty swallowing doesn't always indicate a medical condition. It may be temporary and go away on its own.
What is Ruptured Esophageal Varices?
Esophageal varices are abnormal, enlarged veins in the tube that connects the throat and stomach (esophagus). This condition occurs most often in people with serious liver diseases.
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