Each type of cell has a shape and size related to its own vital task in the body.
Red blood cells
Red blood cells are doughnut shaped, and this lets them pick up and carry oxygen easily. Hemoglobin is the protein inside red blood cells. It carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale.
Red blood cells are made in the bone marrow. They typically live for about 120 days, and then they die.
Nerve cells
Nerve cells are long, thin, and carry electrical signals over long distances. Essentially, nerve cells, also known as a neurons, are the active component of the nervous system. Neurons communicate with each other as well as with other cells through electric signals (nerve impulses), which in turn allows effector organs to respond to the appropriate stimuli.
Muscle cells
Muscle cells can contract (shorten) and relax to produce movement. Muscle cells, commonly known as myocytes, are the cells that make up muscle tissue. There are 3 types of muscle cells in the human body; cardiac, skeletal, and smooth.
Epidermal cells
Epidermal cells in the skin fit tightly together to form a protective layer. Epidermal cells include several types of cells that make up the epidermis of plants. Although they serve a number of important functions, their primary role is to protect from a variety of harmful factors (environmental stressors) including microbes, chemical compounds as well as ultraviolet light among others.
Fat cells
Fat cells are filled with droplets of liquid fat as an energy store. Adipocytes, also known as lipocytes and fat cells, are the cells that primarily compose adipose tissue, specialized in storing energy as fat. Adipocytes are derived from mesenchymal stem cells which give rise to adipocytes through adipogenesis.
Cone cells
Cone cells in the eye detect light, enabling us to see. They respond differently to light of different wavelengths, and are thus responsible for color vision, and function best in relatively bright light, as opposed to rod cells, which work better in dim light.
Cell lifespans
Different types of body cell have different lifespans. Some, such as kin cells, are worn away. Other cells wear out and self-destruct. They are replaced with more of their kind by special cells called stem cells.
White blood cells fighting infection: Less than 1 day
Skin cells: 30 days
Liver cells: 12-18 months
Muscle cells: 15 years
Some nerve cells in the brain: A whole lifetime
Picture Credit : Google