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Is Blood Important to Life?. What is BLOOD?. http://www.youtube.com/watch?v=CRh_dAzXuoU. What is the functions of blood?. Transportation Regulation Protection. Transportation. Nutrients Waste Gases Hormones. Regulation. Fluid – Electrolyte balance Acid – Base balance

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Is Blood Important to Life?


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Presentation Transcript
what is blood
What is BLOOD?
  • http://www.youtube.com/watch?v=CRh_dAzXuoU
what is the functions of blood
What is the functions of blood?
  • Transportation
  • Regulation
  • Protection
transportation
Transportation
  • Nutrients
  • Waste
  • Gases
  • Hormones
regulation
Regulation
  • Fluid – Electrolyte balance
  • Acid – Base balance
  • Body temperature
protection
Protection
  • Against pathogens
  • Against blood loss
characteristics of blood
Characteristics of Blood
  • pH 7.35 – 7.45
  • 4 – 6 Liters
  • Mostly water
  • Oxygenated blood (arterial) - bright RED
  • De-oxygenated blood (venous) – dark RED (appears bluish in color)
  • Viscosity – 3 – 5x thicker than H2O
what carries blood
What carries blood?
  • Arteries – away from heart (oxygenated)
  • Veins – Toward the heart (deoxygenated)
  • Capillaries – connects the two types & in smaller areas
components of blood
Components of Blood
  • Plasma
  • Red Blood Cells
  • White Blood Cells
  • Platelets
plasma
PLASMA
  • Liquid part of blood
  • About 90% water
  • Transports many types of substances
    • Glucose
    • Amino acids
    • Minerals
    • Waste products
albumin
Albumin
  • Most abundant plasma protein
  • Made by the liver
  • Contributes to Colloid Osmotic Pressure
red blood cells
Red Blood Cells
  • Erythrocytes - Erythro means red
  • Do not have a nucleus
  • 4.5 – 6 million in 1 microliter of blood
  • Men have more
  • Hemoglobin
    • Heme (Hb)– Iron (Fe)
    • Each molecule can carry 4 molecules of oxygen
    • Normal 12 – 18 in 100 ml blood
    • Made in Red Bone Marrow
      • Pelvis
      • Sternum
slide13

Hypoxia – lacking oxygen

  • Erythropoietin
  • B12 & folic acid are necessary for RBC production
life span
Life Span
  • RBC’s live around 120 days
  • Removed from circulation by the liver, red bone marrow, & spleen
  • Eaten by macrophages & the iron is returned to circulation
  • The iron is sent to the red bone marrow for new RBC’s
  • Liver stores excess Iron
  • Heme part is not recycled & is converted to bilirubin by the liver
  • Bilirubin in bile during digestion & then excreted by the colon in fesces
white blood cells
White Blood Cells
  • Neutrophils
  • Eosinophils
  • Basophils
platelets
Platelets
  • Thromobocytes
  • Fragments or pieces of cells
  • Live 5 – 9 days
  • Normal is 150,000 – 300,000 /microliter
  • Thrombocytopenia
slide17

Vascular Spasm

    • Smooth muscles in the walls contract to close the hole
  • Platelet Plug
    • When Capillaries rupture& platelets stick together
  • Chemical Clotting
    • Begin within 15 – 120 seconds
    • Factor VIII; Vitamin K; Fibrin; Prothrombin
blood types
Blood Types
  • Genetic
  • A – has A antigen on RBC
  • B – has B antigen on RBC
  • AB – has both A & B antigens
  • O – has neither A nor B antigens
  • Rh Factor: Positive/Negative
    • Rh antigen is present – Positive
    • Rh antigen is not present - Negative