The blood represents 7% of body weight of a person. An adult is considered that can have up to five quarts of it. You take the primary role of nutrients (oxygen and sugar) into body cells and in turn removed for disposal of toxic organic result of metabolism. Blood loss is the output or bleeding or leakage of blood outside the blood vessels (veins and arteries) of the organism as a result of accidental or spontaneous rupture.

Depending on the affected blood vessel may be “vein” when there is heavy, blood is dark and low pressure flows, “capillary” blood is limited to very small quantities and “blood” when the blood is red emerges alive and the rhythm of the heartbeat.

Classification

• External bleeding. They occur when the skin that protects the body breaks down, as in the case when cut. In serious situations, blood loss may endanger the life of the victim.
• Internal bleeding. When blood comes from blood vessels and remains inside the body, eg, perforated gastric ulcer.

For any type of bleeding is to act immediately because blood is a valuable asset to an individual’s life. You should not pay attention to the amount of blood lost. It should be particularly careful to observe the condition and appearance of the victim and that can easily fall into a state of shock (sudden low blood pressure), loss of consciousness and death.

Events
Pay attention to the following signals on the external bleeding:
* Blood coming through an open wound
* Bruising
* Heart rate or fast heartbeat
* Pallor
* Confusion or decreased alertness
* Weakness
* Clammy skin
* Dizziness or light-headedness after an injury
* Low blood pressure
* Shock

In the event that is internal bleeding. Any of the above plus:
* Abdominal pain
* Swollen abdomen
* External bleeding through a natural orifice
* Blood in the stool bright red, brown or black
* Blood in the urine, shade of red, pink, or tea colored
* Vaginal bleeding more profuse and longer than normal
* Blood in vomiting, bright red or brown like coffee

Treatment
* With the wounded lying horizontally. If possible, the person’s head should be lower than the trunk or legs to increase blood flow to the brain

If it is external.
* Make local compression on the bleeding point or with one or two fingers or the palm of the hand, depending on the extent of injury. This step usually solves most of these hemorrhages
* If the bleeding stops, proceed to clean the wound and put a pressure bandage
* If not stopped, it will take stronger compression or distance

If internal.
* Apply the first point
* Nurture the injured and prevent movement
* Should not be possible and threaten the health of the person taken to hospital