Insects do not look like people like that. Their embryonic development proceeds with transformations, they have an external, rather than an internal skeleton, they have a circulatory and central nervous system.
Even insects breathe quite differently from mammals.
In the human body there is only onetrachea. Through it, air that enters through the upper respiratory tract is transported to the lungs. Insects lack a nose, lungs and bronchi, their blood, in contrast to the blood of mammals, does not carry oxygen throughout the body. Breathes insects exclusively with trachea, the amount of which in their body exceeds the number in mammals and can vary from one to two to eight to ten pairs.
The respiratory system of insects is represented byA lot of trachea that permeate their body. Tracheas in insects are tubules that open outward to the spiracles. In the depth of the body, the trachea branches into smaller tubes - the tracheoles. Tracheols braid all organs, delivering oxygen to the places of its consumption.
In insects living in an aquatic environment, there areSpiracles closed type, as they receive oxygen from water, in terrestrial insects - spiracles of open type. However, even the latter can, if necessary, regulate their work. For example, if a terrestrial insect gets into the water, it will be able to live without air for a while, closing the spiracle.
Over time, insects have developed variousDevices to improve the efficiency of the breathing process. For example, well-flying insects have air bags where the oxygen supply can be kept. And some larvae developed the ability to skin breathing.