The heart is normally tubular and usually consists of a longitudinal blood vessel lying in the midline dorsally.A shrimps heart is located on its head. If we base it on the exact anatomy of a shrimp, its heart is located on its thorax just after the head, but both the head and the thorax are covered with a single exoskeleton only, that is why the shrimps thorax can be mistaken as still part of the shrimps head. But in general, we see a shrimp divided only into 2 parts, the head and the tail, we see no thorax in it.