小胞 (xiǎo bāo) refers to small vesicles or membrane-bound structures found within cells. These structures play a crucial role in various cellular processes, including transport, storage, and communication. They can carry proteins, lipids, and other molecules, facilitating their movement within the cell or to the cell membrane for secretion. In the context of cellular biology, 小胞 are essential for maintaining cellular function and homeostasis. They are involved in processes such as endocytosis and exocytosis, where substances are brought into or expelled from the cell. Understanding 小胞 is important for studying cellular mechanisms and diseases related to cellular dysfunction.