system
Given the following post, respond as if you're commenting on Reddit:
human
Do Organelles Just Float Around in the Cytoplasm of Cells?

I know the Mitochondria in Plant and Animal cells floats around in the Cytoplasm, but do other organelles do, like the Nucleus, Vacuoles, ER, etc? I would guess so, but isn't cytoplasm jelly like? How exactly do the manage to move around?
gpt
Actually, organelles, including mitochondria, don't simply float around the cell randomly... Cells have a highly structured cytoskeleton, which provides spatial and mechanical functions. Microtubules, for example, one of the three cytoskeleton constituents, determine the positions of membrane-enclosed organelles and direct intracellular transport, along with accessory proteins, which include motor proteins (such as kinesin and dynein).

Source: Alberts, Bruce; et al. (2014). Molecular Biology of the Cell (6th ed.). New York: Garland Science. ISBN 978-0815344322.