Fill in the blanks with the missing information about primaryand secondary lymphoid organs:
The ___________ is the site of T cell development andmaturation. The ________ is the site of B cell differentiation andhematopoesis.
The ___________ are the sites where immune responses are mountedto antigens in the lymph. The _____________ is where immuneresponses are mounted to antigens in the blood. The ___________ islymphoid tissue that responds to antigen in the digestive,respiratory, and urogenital systems. Epithelial cells lackingmicrovilli that transport the antigens to these tissues are knownas ________.