How do flys breathe?

Flies breathe through a system of tiny holes, called spiracles, which are located along the sides of their bodies. Air enters the spiracles and travels through a network of small tubes, called tracheae, which branch out to various parts of the body. Oxygen diffuses from the tracheae into the fly's tissues, while carbon dioxide diffuses out.

This respiratory system is called open tracheal system, and it is common among insects.

The spiracles can be opened and closed, which allows the fly to control the flow of air in and out of the body.

This is important for maintaining a proper oxygen balance and for preventing water loss.

Flies have a high metabolic rate, and they require a lot of oxygen to support their energy needs. The open tracheal system allows them to breathe efficiently and maintain a high level of activity.