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Part 3: Chapter 8
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• Functions– Transporting oxygen, nutrients and wastes– Protecting against disease by producing
antibodies and defending against pathogens– Maintaining body temperature by circulating
throughout the body• Liquid Portion
– Plasma• Solid Portion
– Red blood cell (left)– White blood cell(right) – Platelets (middle)
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Arteries Carries blood away
from the heart Veins
Carries blood to the heart
Capillaries Where exchange
occurs
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Brain signals the heart to circulate more oxygenated blood & to constrict the blood vessels in the extremities
Brain signals the lungs to work harder to increase oxygen levels
Platelets collect at the wound to stop the blood loss through clotting
White blood cell gather to stop any infection that might occur
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Blood vessels open externally Tears in the skin
Venous bleeding Blood flow will be steady without spurting Usually dark red or maroon in color because it is
oxygen poor
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- Life-threatening because it is rapid and severe & spurting
-Blood loss is great
- Bright red in color because of the oxygen
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Place pressure on a wound to restrict the blood flow and allow for normal Clotting to occur
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Placing a sterile dressing and a gloved hand
Gloved hand by itself Apply pressure with your hand
If you do not have disposable gloves have the victim apply pressure if possible
Pressure bandage A bandage applied snugly to control bleeding
If blood continues to soak through the bandage add more DO NOT remove any of the soaked bandages
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Blood escaping from arteries, capillaries or veins into space in the body
Signs: Soft tissues that are tender or swollen or hard Swelling, tenderness or rigidity in the injured area Anxiety or restlessness Rapid, weak pulse Rapid breathing, shortness of breath Skin that feels cool or moist or looks pale Nausea, vomiting or coughing up blood Abdominal pain Excessive thirst Decreased level of consciousness Severe headache
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For minor internal bleeding, such as a bruise to the arm, apply an ice pack
There is little you can do for a severe internal bleeder Do no further harm Monitor breathing and consciousness Help the victim rest in the most
comfortable position Keep the victim from getting chilled or
overheated Reassure the victim Give specific care needed