Happy Valentine’s Day
Give me one good reason we shouldn’t talk about…
BLOOD
Give life…Donate blood
We donate blood…
Some of us willingly
and others unwillingly.
But either way it looks
like this and it doesn’t
really hurt.
• And after they are finished they have another unit of blood that someone will desperately need due to surgery, an accident, or even childbirth.
FACT
46.5 gallons: amount of blood you could donate if you begin at age
17 and donate every 56 days until you reach 79 years old.
Rarest Blood Type?
• The rarest blood type is the one not on the shelf when it’s needed by a patient.
• If you are really curious it is type AB-.
Blood Facts
Blood temp = 38 degrees C (100.4 F)
Slightly Alkaline = 7.35 - 7.45 pH
Your total blood volumeFemales =Males =
Medical Terminology
Cardiovascular systemcardio--vascular
Hematologyhemato- / hemo-
Blood Functions
Transportgases, nutrients, wastes, hormones
RegulatepH, body temp.
Protectclots, WBCs, proteins
Blood Component Overview
PlasmaRed Blood CellsWhite Blood CellsPlatelets
Plasma
“Liquid” portion of blood 90% Water by volume
Plasma Proteins Albumins- maintain osmotic pressure Globulins- defense proteins (i.e. antibodies)
Fibrinogen- blood clotting
Dissolved substances Metabolites, Gases, Enzymes, Hormones, Wastes
Plasma
FACT
Blood or plasma that comes from people who have been paid cannot be used in human
transfusion.
“Erythrocytes” or RBCs
Produced in red bone marrow (locations?)
Biconcave shape (>surface area : volume)
Lack nucleiPacked with cytosol and hemoglobinOxygen & Carbon dioxide carrierLife span = 120 days
Illegal method of training…
Blood DopingDraw blood --> Train --> Draw blood…
Physiological response?Prior to competition…
FACT
Anemic patients often need blood transfusions to increase their red
blood cell levels.
“Leukocytes” or WBCs
Produced in bone marrow for Defense
Granular (contain cytoplasmic vesicles)
Agranular (B cells, T cells, killer cells)
Phagocytosis (bacteria & viruses) Life span = a few days
Human White Blood Cell
White Blood Cells
FACT
Granulocytes, a type of white blood cell, roll along blood vessel
walls in search of bacteria to engulf and destroy.
Platelets
“Bits” of cytoplasmLack nucleiCoagulation or clotting functionClot small vessels = platelets + fibrin threads
Life span = 5 - 9 daysHeparin, Coumadin, Aspirin (inhibit clotting)
FACT
Cancer, transplant and trauma patients, and patients undergoing
open-heart surgery most often require platelet transfusions.
ABO Blood Group System
Offspring receives two allelesFour general blood types =Antigens: Type ___ has ___ antigens
Antibodies: Type ___ has ___ antibodies
Rh factor =
FACT
• Blood centers often run short of types O and B red blood cells.
• Think critically… 2 key reasons.
Links to more video footageBlood Circulation in Veinshttp://www.fotosearch.com/crt778/001203cf/
Platelet Circulationhttp://www.fotosearch.com/ung140/u17433116/
Blood Component Review(fill in boxes with at least 2 pieces of information)
Plasma Red Blood Cells
White Blood Cells
Platelets