Student Question

What are vesicles, tubules and lamellae?


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Vesicles, tubules, and lamella are examples of mesosomes. They are formed by the folding of the cell membrane.

Vesicles are small, membrane-bound sacs within a cell. Vesicles may contain fluids, such as vacuoles. Vesicles may also contain enzymes that aid in the metabolism within a cell. Vesicles often aid in the transportation of materials within the cell or across the cell membrane.

Tubules are small tubes that may be found in various structures or organs in the body. An example of a cellular tubule is a T tubule. A T tubule stands for a transverse intracellular tubule that is formed by the invagination of the cell membrane. T tubules surround myofibrils of the cells in the cardiac and skeletal system, thus serving as a pathway for electrical signals within a muscle cell.

In biology, a lamella is a plate of disc like structure. Lamella are found in the chloroplasts eukaryotic cells. In the chloroplast, lamella are extensions of thylakoids. These lamellae link the thylakoid within one granum to another.  

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