### substance | blood:

Arterial blood
* comes out in spurts.
* is bright red in color and venous blood has a dull red color
  - or scarlet and usually pulsates if the artery has been cut
* leaves a bird's core at body temperature while venous blood in the feet is cool.
* reaching the feet is already cool and venous blood reaching the core is already warm.
* works best with no acid at all.

### substance | blood:

Blood clot
* Most blood clots start as small clots originating in the legs that come loose.
* affect the large vessels in the brain.
* are blood
  - clumps of blood cells that can block the normal flow of blood
  - common
  - more likely to occur in smokers than in nonsmokers
  - one of the causes of death to mothers who deliver babies normally
* are the biggest causes of stroke
  - main sudden cause of heart attack
* are the most common cause of artery blockage and brain infarction
  - of the serious side effects of oral contraceptives
  - side effects that are known
* can be fatal if they reach the lungs or brain
  - block the flow of oxygen-rich blood and lead to heart attack and stroke
  - break away and threaten life
* can cause immediate death and permanent disability
  - ischemia and infarction in two ways
  - life-threatening heart attacks and strokes
  - severe and life-threatening problems
  - some women to have miscarriages
  - develop
* can form at the plaque and cut off the flow of blood
  - in the legs after four or more hours sitting in a tight space
  - on an outer wound or internally
  - or lodge in a narrowed artery
* can lead to heart attack and stroke
  - tissue death
  - occur as well as pulmonary embolism
  - produce pain and swelling in the legs
  - rupture, causing dramatic blood loss, shock , and even death
  - sometimes occur
* can travel from the heart into the bloodstream and circulate through the body
  - through the blood vessels to the brain and cause a stroke
  - to the lungs where they can be serious, even fatal
* cause strokes.
* consist of a mass of fibers and blood cells.
* do occur more frequently in patients who have cancer.
* form around the filament, stabilizing the aneurysm
  - easily and when they block the circulation, the person can have a heart attack
* form, so less blood can get through
  - usually painlessly, but some cause pain, swelling, even loss of the leg
* formed during flights are the most common hazard of air travel.
* increase the risk of heart attacks and strokes.
* interrupt the supply of oxygen to the brain and cells die.
* is blood
* originate from sticky clumps of platelet cells in the blood.
* present more imminent danger than arteriosclerosis.
* prevent loss of blood.
* start in the legs and can travel to the lungs with fatal results.
* stop the wflow of blood and can cause serious medical problems, disability or death.

### substance | blood:

Blood clotting
* can occur from an increase in hemoglobin, which has caused blood to thicken.
* involves the fibrous protein called fibrin.
* is actually a very complicated process
  - made possible by plasma proteins and cell fragments called platelets
  - prevented by either using approved anti-coagulants or mechanical defibrination
  - the body's way of protecting itself against blood loss when tissue is damaged
* normal body process which protects the body from serious damage.
* physiological process involving a cascade of biochemical events.
* potential problem when blood flow is disturbed in any way.
* process that requires the following three steps to be successful.
* requires vitamin K and proteins made by the liver.