Roles of Different Cells

Roles of different cells in conducting nerve, muscles, blood, skin and bones in human body: Animal tissue call is the structural and functional unit of organisms. Functions of unicellular or multi cellular animals are performed in different ways. From the very appearance of the ancient world till today species of phylum protozoa performs their biological functions, such as: taking of food, growth and reproduction by the single cell. In multi cellular animals there are differences and variations in cells. In human body there are different types of cells which are engaged in different activities which as nerve cells spread within the human body and forms a net work. These cells are to receive stimuli and send it to the brain and again, sends off motor impulses from the brain to the definite organ. Both nerve cells in the ear and eye help in vision and hearing. Due to the lack of different kinds of nerve cells most of  the animals can see only at day time some at night. Muscle cells are used in writing, walking and movement. Three kinds of blood cells are engaged in different activities. Red blood corpuscles absorbs oxygen from lung and transports oxygen by the heart to different cell’s of the body though arteries and capillaries. While blood corpuscles prevents from disease. Platelets are responsible for starting the process of blood clotting. As a result bleeding is stopped from the wound. Besides making body covering integument cells performs different functions according to its location. Hair grows from the integument cells of the head. Sweat secretes from the sweat gland in particular space. Bone cell constitutes bone with deposition of minerals or cartilage and makes structure and supports the body. Bone cells are very much important to build structure, shape, growth of the bones etc.