this was done by an analysis of standard sections of normal thymuses , of sections of thymuses perfused with colloidal carbon , of silver-impregnated sections , and of sections of thymuses of rats injected intramediastinally with a fluorescent antigen or intravenously with trypan blue , and by electron microscopy of the thymic capsule .
C0040113
thymuses
C0229945
thymic capsule