The following points highlight the four main types of tissues seen in animals. The types are: 1. Epithelial Tissues 2. Connective Tissue 3. Muscular Tissue 4. Nervous Tissue. Type # 1. Epithelial Tissues: The cells taking part in this type of animal tissue have a regular, well-defined shape and scanty intercellular substance. They are usually in contact with one another [...]
The following points highlight the six important constituents of the living body. The constituents are: 1. Matter 2. Elements 3. Atoms, Molecules and Energy 4. Chemical Reactions 5. Enzymes 6. Mixtures and Compounds. Constituent # 1. Matter: It is defined as something which occupies space and has some weight. Matter may be formed of one kind of substance or of [...]
The following points highlight the three main components of animal cell. The components are: 1. Plasmalemma 2. Cytoplasm 3. Nucleus. Animal Cell: Component # 1. Plasmalemma: This is the outermost limiting membrane of the cell. The concept of plasmalemma developed long before it was actually seen. The structure of plasmalemma was revealed only after the use of electron microscope. It [...]