a tough and rigid layer that surrounds the cell. It is made up of cellulose. It is absent in animal cells.

organelles where microtubules are organized. They regulate cell division. A centrosome is composed of two centrioles at right angles to each other.

the smallest structural and functional unit of an organism. It is microscopic. All living organisms are classified as unicellular or multicellular

a network of tubules and flattened sacs. It plays a major role in the production, processing, and transport of proteins and lipids. It is the cell's transport system and is of two types smooth ER (without ribosomes) and rough ER (with ribosomes).

a spherical shaped organelle. It is the brain or the command center of the cell. It regulates the integrity of genes and gene expression and is also responsible for the protein synthesis, cell division, growth and differentiation.

cylindrical cell structures composed of groupings of microtubules, which are tube-shaped molecules or strands of proteins.

the smallest structural and functional unit of an organism. It is microscopic. All living organisms are classified as unicellular or multicellular.

a semipermeable membrane made up of lipids and proteins. It is present in both plant and animal cells. The cell membrane controls what passes in and out of the cell and works like the security guard of the cell.

a tough and rigid layer that surrounds the cell. It is made up of cellulose. It is absent in animal cells.

microscopic thread-like structures found in the nucleus of the cell and packed with DNA. They carry hereditary information in the form of genes.

spherical membranous sacs of acidic enzymes which help digest macromolecules. Lysosomes act as the garbage disposal and recycling centers of the cell and are often referred to as “suicidal bags”.

distinctive oblong or oval shape organelles bound by a double membrane. They are considered the "power house" of the cell. They generate fuel for the cell's activities through cellular respiration.