Do insects (ie flies) have hearts and lungs and organs etc?
Of course they do. It doesn’t look exactly like ours, but they have pretty much the same organs we do. It is arranged very differently though. Their body system is a lot simpler than ours. Instead of a true brain, they have a collection of nerves called the Cerebral Ganglion. They will also have thoracic ganglia down the spinal column. They don’t have lungs, as they have what is called an open circulatory system. This means that they have tiny holes in their exoskeleton called spiracles that allows air to pass though the body. This is why insects are so small, this kind of respiratory system is very inefficient and won’t carry enough oxygen to organs in a larger animal.
