Answer:
tissue
Step-by-step explanation:
From the perspective of biology, the tissue consists of a group of cells. These cells can be the same, slightly different, separated by intercellular or liquid components, as seen in the image above. In addition, their functions are identical when present in a multicellular organism. In medicine, tissues are studied through the diagnosis of a disease: histopathology. No wonder, the medical specialty responsible for researching how tissue grouping occurs for the formation of systems and organs is histology.
Tissues consist of similar cell structures that, grouped together, work towards the same function in the body. Such cells cannot be found separately, since they are necessarily associated with each other for the formation of organs and, subsequently, systems. Cells, when organized in groups, perform certain functions in the human organism.