There are 4 main types of tissues in animals, which you have mentioned above. Here is a brief discussion of their function and structure:
1. Epithelium Tissue: It is composed of layers of cells that are used for covering organs surfaces. They help in protection, secretion and absorption of related objects. Examples are skin surface and inner lining of digestive tract.
2. Connective tissue: Their function is to hold everything together. They are characterized by separation of cells with extracellular matrix. Examplea re Bone and blood.
3. Muscle tissue: Function to produce force. They cause animals to locomote and move. Examples include Cardiac musclses etc.
4. Nervous tissue: Are the tissues that form brain, spinal cord etc.
1. Epithelium Tissue: It is composed of layers of cells that are used for covering organs surfaces. They help in protection, secretion and absorption of related objects. Examples are skin surface and inner lining of digestive tract.
2. Connective tissue: Their function is to hold everything together. They are characterized by separation of cells with extracellular matrix. Examplea re Bone and blood.
3. Muscle tissue: Function to produce force. They cause animals to locomote and move. Examples include Cardiac musclses etc.
4. Nervous tissue: Are the tissues that form brain, spinal cord etc.