BIOL 1215 Lecture Notes - Histology, Endoderm, Mesoderm
Document Summary
What is a tissue? tissue is a group of cells that have a common embryonic origin and function together to carry out specialized activities. Tissues may be: hard (bone), semisolid (fat), or liquid (blood) Histology is the science that deals with the study of tissues. Pathologist specialized in laboratory studies of cells and tissue for diagnoses. Covers body surfaces and lines hollow organs, body cavities, duct, and forms glands. Binds organ together, stores energy as fat, provides immunity to disease causing organisms. Generates the physical force needed to make body structures move and generate body heat. Detect changes inside and outside body and responds by generating nerve impulses that activate muscular contractions and glandular secretion. Tissues of the body develop from three primary germ layers: ectoderm first tissue formed in human embryo, endoderm, mesoderm. Epithelial tissues develop from all three germ layers. All connective tissue and most muscle tissues drive from mesoderm.