Histological techniques are used to study mesodermal tissues at the microscopic level. Common methods include tissue staining techniques such as Hematoxylin and Eosin (H&E) staining, which highlight different cell types and structures. Immunohistochemistry can be used to detect specific proteins and markers associated with mesodermal tissues. Additionally, electron microscopy provides detailed images of cellular structures, aiding in the understanding of mesodermal tissue organization and function.