35. The organ of the lymphatic system is in which T cells complete their development is called

lungs
heart
spleen
thymus

Thymus

Explanation:

T cells mature in the thymus

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unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.