00:02
The first thing that comes when we think about animals are usually mammals for humans.
00:10
But the most abundant group of animals are neither mammals, not marine animals, but arthropods.
00:26
From honeybees to spiders, all of these insects or other species belong to the group of arthropods.
00:35
In fact, 80 % or even more animal species are just, these are some important facts about orthopods and there are many more they are also segmented like anhylids or they have those specialized body regions some have two some have three but it depends on the group of species they consist of a hard exoskeleton mostly of chitin and some other proteins.
01:25
Chitin is also found in mushrooms, by the way.
01:30
It is light.
01:31
It traps moisture, but it's non -living.
01:35
So, orthopause often have to go through a process of molting or shedding their old exoskeleton by growing a new one, according to their size.
01:48
They also have a pair of joint appendages or limbs that could be used as legs, sensory structures, mouth parts, or other diverse group of functions that they serve.
02:08
Some even have antenna and compound eyes, which are actually part of their nervous system.
02:21
They have a brain and a spinal cord type of system a lot like the analids as well.
02:30
And their compound eye structure is one.
02:33
One of the best in the animal kingdom, where they don't have just two eyes, but a compound of eyes that are very high in resolution, apparently, and also part of the nervous system.
02:51
They have an interesting circulatory system as well, which is open, very different from the closed circulatory system...