Lymphoid organs such as the spleen, adenoids, tonsils, and thymus are located in the digestive tract walls, house lymphocytes, facilitate lymph passage, and contribute to immune defense.
Lymphoid masses like the spleen, adenoids, tonsils, and thymus are found in digestive tract walls and play a role in defense against microbes, containing lymphocytes and allowing lymph passage.
| Front | Average human breathing rate normal vs exercise |
|---|---|
| Back | 15 to 20 times per minute normal Exercise: 30 times/min |
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