Neuropeptides modulate the heart of the stick insect Baculum extradentatum.

The dorsal vessel of the stick insect Baculum extradentatum consists of a tubular heart and an aorta that extends anteriorly into the head. Alary muscles, associated with the heart, are anchored to the body wall with attachments to the dorsal diaphragm. Alary muscle contraction draws hemolymph into the heart through incurrent ostia.