Spiders, unlike insects, have only two body segments (tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (called the opisthosoma). Spiders are predatory invertebrate animals that have two body segments, eight legs, no chewing mouth parts and no wings. Spiders are found all over the world. Spiders show a wide variety of behavior, from the ballet-like mating dances of certain jumping spiders to the seeming athletics of bolas spiders snatching their prey. Most diversity comes with the mode of predation, for example whether the spider waits for it in its orb web, or hunts it down.

Most spiders are unlikely to bite humans because they do not identify humans as prey. Spiders, even small ones, may however bite humans when pinched.

Spider do not intentionally bite or attack human as they do not find them as their prey. They do sometimes bite human when pinched and can leave you with a pain as dangerous as that of a bee sting. So it is better to remove them to avoid any future accidents.

If spiders are present in your area, be very careful when moving cardboard boxes and other such objects that may have become the shelter of a venomous spider. Do not be afraid; but just do not grab a spider.

A spider starts life inside an egg.  The mother spider lays many eggs.  Sometimes the mother spider dies after laying her eggs.  The eggs usually hatch in a very short time.  A baby spider is shaped like its mother, but may be lighter in color.  The baby spider is soon able to spin its own web and capture its own food.  It does not have to be taught.  This comes naturally.  Just like when you learn how to crawl or walk when you were a baby.

The spider's skeleton us on the outside of its body.  It looks like skin.  When the baby spider, or spiderling, grows too big it must shed its skeleton.  The old skeleton splits and the spider steps out of it.  This soft, new skeleton soon grows hard.  The spider is now an adult.