DIfferent tissues are composed of intracellular substances and cells, with one component typically being more abundant than the others. During the body’s development, cells specialize and gather together based on their similarities to form tissues. These tissues then combine in specific ratios to create organs, leading to a highly organized system where each part has a distinct role. When tissues unite to form a functional unit, it results in the creation of an organ. The structure and functions of organs are determined by how tissues are organized within it.