Does a cricket have heart and lungs?

Yes, crickets have a heart and lungs. Crickets, like most insects, have an open circulatory system. This means that their blood flows freely throughout their body, instead of being contained within blood vessels. The cricket's heart is a long, thin tube that runs along the dorsal side of its body. It pumps blood through the cricket's body, and the blood picks up oxygen from the spiracles (breathing pores). The oxygen is then transported to the cricket's cells, and the carbon dioxide waste is transported back to the spiracles to be exhaled.

Crickets have a tracheal system, which is a network of tubes that carry air directly to their cells. This allows crickets to breathe even when they are buried underground or underwater. The spiracles connect to the tracheal system, and air is drawn in and expelled through the spiracles. The tracheal system also helps to maintain the cricket's water balance.