The question is not worded well enough to be understood clearly. Generally speaking, the "worm" could represent the dreamer's fear of disease.
The heart pumps the blood around the body.
no
the body
Typically, crystals in the blood mean that there is an inflammatory or immune system reaction going on inside your body. You will usually be medically treated for this type of condition.
That depends on a variety of things going on inside your body. You'll need an HIV test to find out.
Frequently the answer is "blood is blue inside us and red when it hits the air". Blood carries oxygen in our body so this really doesn't make sense. Blood is red with arterial blood being brighter and venous blood being darker. Our blood vessels have a bluish appearance through our skin but just as water going through PVC piping isn't white, blood isn't blue.
This dream might mean that the dreamer feels exposed, particularly if there were other people in the dream.
Blood doesn't clot inside of the body because it is all working together. Some blood may clot in the body, which causes blood clots. This is caused by blockages. Blood that doesn't clot has a wide flow.
The heart pumps blood rapidly, letting it flow through the body.
Because blood doesn't rust.
its inside our body
inside the body blue outside the body red