Definition: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: A deadly avian adenovirus causes the "marble" disease that affects this organ, and,it is completely absent in Ivemark syndrome. Deletions in 7q31-32 give rise to a lymphoma of its marginal zone, and it contains the cords of Billroth between its sinusoid vessels. It is surrounded by a fibroelastic and serous coats. This organ contains Malphigian corpuscles that contain germinal centers for lymphocyte production. Its marginal zone separates its red pulp and white pulp, and it can become enlarged as a result of diseases like Gaucher's and Epstein-Barr. Notably sequestered in sickle-cell anemia, for 10 points, identify this organ of the lymphatic system in which erythrocytes are both destroyed and stored.
Output:
Science