Tag: 9th Biology

  • Biology IX | Tissues, Organs, Organ System, Organism | Part 2

    Tissues, Organs, Organ System, Organism | Part 2 ANIMAL TISSUES Cell are organized into four types of tissues in higher animals including man (i) Epithelial tissue : – It is a protective covering tissue and forms a continuous layer on the entire body surface and cavities inside the body and its parts. The skin, surface…

  • Biology IX | Tissues, Organs, Organ System, Organism | Part 1

    Tissues, Organs, Organ System, Organism | Part 1 Tissue Tissue can be defined as a group of cells more or less alike in size, shape, performing the same function and having common origin. Histology :- The microscopic study of tissues and their functions is known as histology. PLANTS TISSUES Plants body are made up of…