What organs do jellyfish have?

Jellyfish do not have traditional organs like those found in more complex animals. Instead, they possess a simple structure that includes a gelatinous bell and tentacles, which contain specialized cells called cnidocytes for capturing prey. Their body is primarily made up of a substance called mesoglea, and they have a basic nerve net for responding to stimuli, but they lack a centralized brain, heart, or respiratory system. Nutrients are absorbed directly through their body surface, and waste is expelled through the same opening used for feeding.