tissuetype
Tissuetype is a biological classification that groups cells into tissues by shared structure and function. In animals, the four primary tissue types are epithelial, connective, muscle, and nervous tissue. Plants and other kingdoms use different schemes, but the idea of grouping cells by role is common.
Epithelial tissue lines surfaces and cavities, forms glands, and provides protection, absorption, secretion, and filtration. It
Connective tissue supports and connects tissues and organs. It includes loose and dense connective tissue, cartilage,
Muscle tissue contracts to produce movement. Skeletal muscle enables voluntary motion; smooth muscle governs involuntary actions
Nervous tissue transmits and processes information. It comprises neurons and glial cells and forms the brain,
Developmentally, tissue types originate from embryonic germ layers—ectoderm, mesoderm, and endoderm—giving rise to the body's diverse
In research and medicine, tissue type is identified by histology and molecular methods. Stains (e.g., hematoxylin
Understanding tissuetype supports anatomy, pathology, and transplantation science, informing diagnosis, education, and research.