Matching 22. For each of the following key choices, decide whether it applies to the lymph nodes, the spleen or the thymus, and complete Table 6.1. Key choices: where T-lymphocytes mature Bean shaped Largest lymphatic organ Site of multiplication of activated lymphocytes Oval in shape Stores blood Lies immediately below the diaphragm At its maximum size at puberty Filters lymph Made up of two narrow lobes Red blood cells destroyed here Distributed throughout lymphatic system Maximum weight usually 30–40 g Lies immediately behind the sternum Size from pinhead to almond-sized Secretes the hormone thymosin Synthesises red blood cells in the fetus Phagocytoses cellular debris Table 6.1 Characteristics of lymph nodes, spleen and thymus Spleen Thymus Lymph node

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