vesícules

Vesicles are small, fluid-filled sacs within the body. They are membrane-bound structures that can vary significantly in size and function. In biology, vesicles are crucial for intracellular transport and storage. They are often formed by budding off from existing membranes, such as the endoplasmic reticulum or Golgi apparatus, and can then fuse with other membranes to deliver their contents. This process is fundamental to many cellular activities, including the secretion of hormones and neurotransmitters, the uptake of nutrients, and the removal of waste products.

In a broader sense, the term "vesicle" can also refer to small, bladder-like structures in plants. These might be involved in storing water, pigments, or other substances. In medicine, a vesicle is often used to describe a small blister or sac of fluid that forms on the skin, typically due to a burn, irritation, or certain medical conditions. These cutaneous vesicles can contain serum, pus, or blood. The precise composition and formation of vesicles are highly dependent on their cellular or physiological context.