Structure of different types of cells

The cells of the human body have different shapes and sizes.

The shape and size of cells are related to the specific function they perform. Some cells like Amoeba have changing shapes which helps in its locomotion. The shape of the cell may be variable like white blood cells. Fixed shape of cell occurs in most plants and animals.

The size of different cells ranges between broad limits. Some plant and animal cells are visible to the naked eye however, some are microscopic.

Each living cell has the capacity to perform certain basic functions that are characteristic of all living forms. There is a division of labour in multicellular organisms such as human beings. Different parts of the body perform different functions like the human body has a heart to pump blood and stomach to digest food. Similarly, division of labour is also seen within a single cell. Each cell has got certain specific components within it known as cell organelles which perform a special function such as making new material in the cell, clearing up the waste material from the cell.