Answer:
tissue is a collection of related cells that perform the same job within an organism. All animals, including humans, have four fundamental types of tissue in their bodies. All of the body's organs, structures and other contents are made up of them.
Explanation:
Epithelial tissue - Epithelial tissue consists of layers of densely packed cells that line the body's surfaces for protection, secretion and absorption. The skin, the lining of the mouth and nose and the lining of the digestive system are all examples of epithelial tissue.
Muscle tissue - Muscle tissue is made up of cells with contractile filaments that move past one another, changing the cell's size. Smooth muscle, which lines the insides of organs, skeletal muscle, which is related to bone and moves the body and cardiac muscle, which is only present in the heart are the three forms of muscle tissue.
Nerve tissue - The nervous system, which includes the brain and spinal cord, is made up of nerve cells (neurons) that make up nervous tissue.
Connective tissue - Connective tissue is made up of a variety of cell types that all contribute to the body's structure and support. Connective tissues include bone, blood, fat and cartilage. Adipose tissue and bone cells have densely packed connective tissue, while adipose tissue (fat cells) has loosely packed connective tissue.
