Do insects have a endocrine system?

Yes, insects have an endocrine system. The insect endocrine system is composed of glands that secrete hormones into the insect's body. Hormones are chemical messengers that travel through the bloodstream and affect the activity of other organs and tissues. The insect endocrine system plays a role in a variety of processes, including growth and development, reproduction, and metabolism.

The main glands of the insect endocrine system are the corpora allata, the corpora cardiaca, and the prothoracic glands. The corpora allata secrete juvenile hormone, which is responsible for the growth and development of insects. The corpora cardiaca secrete a hormone called adipokinetic hormone, which is responsible for the release of fat from storage. The prothoracic glands secrete ecdysone, which is responsible for the molting process in insects.