What cellular components are considered vesicles?

Vesicles are small, membrane-bound sacs within the cell that play a crucial role in transporting materials. Among the options provided, vacuoles and lysosomes are both classified as vesicles due to their structure and function.

Vacuoles are storage vesicles that can hold various substances such as nutrients, waste products, or water. They are particularly prominent in plant cells, where they help maintain turgor pressure. Lysosomes are specialized vesicles that contain enzymes necessary for breaking down waste materials and cellular debris. Their role in digestion and recycling within the cell is vital for maintaining cellular health.

The other options do not pertain to vesicles. The nucleus and nucleolus are involved in genetic material management and ribosome production, respectively, while the Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids but is not classified as a vesicle itself. The cell membrane and cytoplasm refer to the outer boundary of the cell and the gel-like substance within it, neither of which are vesicle structures. Therefore, vacuoles and lysosomes are correctly identified as vesicles due to their membrane-bound nature and functional characteristics.