When we look to small creatures (like insects), we may wonder how they could survive their entire life span. Do they also have the necessary organs and internal functions that humans have? Do these animals also have hearts or circulatory system to pump blood into its body? Or other types of systems in their body to survive and live?
We may think it other ways, but the miracle of life is not only for humans but also for small creatures like the insects. They do not only have internal organs but have other organs unique to insect’s way of life.
And adultinsect has a three section bodies which are the head, thorax and the abdomen. Two antennae is connected to their head which acts as their sense of smell and sense of touch. The antennae are one of the insect’s most important organs as human eyes do. They also have eyes but most of the time, the antennae is more important than this. Their mouth and eyes are also part of the head as most animals and humans do.
Insects also have a heart and a blood which acts the same thing as humans do. Some insects have a complete circulatory system just like humans. This means that blood also passes to the heart which pumps it to the different parts of the insect’s body. The blood goes to the holes of the heart which opens and closes to drive the blood through the arteries. The onlydifference to that of a human circulatory system is that insects do not have capillaries and veins.
Insects lack capillaries and veins because they have a different circulatory system compared to humans. In fact, an insect’s circulatory system is not fully developed because they do not need oxygen for blood circulation. Unlike humans, our blood needs oxygen to carry the nutrients to different parts of our body.
An insects breathing system is different from humans, that is, having tiny holes in the sides of their body. The oxygen in inhaled from these tiny holes and goes directly to the insect’s cells. The carbon dioxide is also exhaled through these holes.
With this, the insects breathing system is simpler than that of a human. This simple system of breathing is appropriate to tiny animals and is not applicable for larger ones, like humans. This very simple system is breathing is in fact more appropriate to tiny animals which makes up half of all living animals on the planet.
In addition, insects were also called “hexapods” which means having six (hexa) feet (pods). The insects usually have three pairs of feet which are attached to their thorax.