Do insects have a heart?

There are a lot of differences between a human being and an insect but have you ever thought about a mosquito that is only 16 millimeters large in size could have a heart too. A honey bee that is as tiny as a paper clip have a heart too. Usually we only see that insects have legs, antenna and wings but these are only the external parts and I guess none of us have ever thought they have a heart too but they are different from the human heart. If we talk about ant it does not have a heart neither any blood vessels but the only thing that keeps them alive is the open circular system and for breathing they have two small openings at the front called spiracles

The term used for an insect heart is called “Dorsal Vessel “which is a flexible tube that is located between the thorax and the abdomen. This tube runs in almost whole body and pumps the blood called Hemolymph which is basically a fluid that runs in the body of an insect that works exactly like blood in human body. Hemolymph is responsible for transporting the nutrients, salts, hormones and metabolic wastes controlling the shape of the body and its movement as well. The fluid only pumps in between head and tail because there is no other space in their body parts.

If we compare the body of human being, we have a lot of different parts in our body but an insect is very tiny and it does not have parts other than head and tail. Unlike human beings insects do not have blood vessels or arteries to carry blood everywhere that is needed in the body, but the Dorsal Vessel is responsible for carrying the fluid from in muscles and Ostia.