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Abdomen

Cephalothorax

tarantula

body parts

The Heart

Eyes and Brain

Most spiders have eight eyes but some have 12, 6, 4, 2, or even no eyes. Few spiders have good eyesight but they can detect movements dark or bright.

The heart looks like roots from a plant. Next to the heart are the book lungs. The spider's heart rate is about 25 to 35 beats per min.

The brain connects to all the nerves in the spider's body and controls the movement of the spider.

Sucking stomach

The Intestine

The Intestine is for breaking the spider's food down so it can digest.

When a spider catches it's food and has injected venom in it, it pukes on it's food which makes the food liquified. It then sucks it up using its sucking stomach.

The Arteries

The Ovary

The arteries bring blood away from the heart to the tissues. Tarantulas have pale blue blood.

Female spiders have a pair of ovary which produces eggs. It looks like a small heart with yellow dots on it. Tarantulas will make a egg sack to protect the eggs. The egg sack may hold about 200 eggs.

The Legs

The Fangs

The Spinnerets

The fangs have venom in them to paralyze it's prey. If a tarantula bit a person, the person would not die because it's venom is weaker then a bee sting.

Spiders have 8 legs instead of 6 like insects. The legs are located in the bottom of the cephalothorax, and have claws at the ends of the legs. The hair on the legs are for detecting movement near the spider. A tarantula can re-grow a lost leg by molting. When threatened, tarantulas can use their back legs to fling off hair from it's abdomen causing the intruder an irritating reaction.

The spinnerets are located at the end of the abdomen. The spinnerets are for making silk. Tarantulas don't use their silk for webs, instead they use it for egg sacks and reinforcing the burrows they hide in. Scientist discovered that tarantulas might be able to produce silk in their legs.

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