Part 3: Chapter 8

• 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)

Arteries Carries blood away

from the heart Veins

Carries blood to the heart

Capillaries Where exchange

occurs

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

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

- Life-threatening because it is rapid and severe & spurting

-Blood loss is great

- Bright red in color because of the oxygen

Place pressure on a wound to restrict the blood flow and allow for normal Clotting to occur

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

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

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