Spiders, like most arthropods, have an open circulatory system. That is, there is no true blood or veins that carry it. Rather, their bodies are filled with blood lymph. Blood lymph is pumped by the heart through the arteries into a space called the paranasal sinuses that surrounds the internal organs.
Does the spider have a whole body?
All spiders have eight legs, two body parts (cephalothorax and abdomen), a fang-like "chelicerae", and an antenna-like "pedipalp". Click on the terms below for more information on each body part. The cephalothorax is the first of two body parts of a spider. 2009
How do spiders move without bones?
Spiders have an exoskeleton, an exoskeleton made of chitin and protein, and no internal bone. Inside the exoskeleton, there are muscles that bend the legs and pull them inward. 2019
Do spiders have organs?
Spiders have the same basic body system as humans, but they do not function the same and are placed differently within the body. The cephalothorax contains the brain, stomach, eyes, and mouth, and the abdomen contains the heart, digestive tract, reproductive organs, and lungs.
Do spiders have a brain and a heart?
Now your heart is pumping red blood and oxygenating your body. Interestingly, even if you cover the insect's mouth, you can still breathe. Insects breathe through hundreds of small holes in their bodies. But they still need a heart.
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