Blood Flashcards
What is the main function of blood
It transports:
Gas
Nutrients
Signalling molecules
Metabolic waste
What are the 5 other functions of blood
Regulates body temperature
Buffers and balances ph and ion
Defends against pathogens and toxins
Restricts fluid loss at injury site
Hydraulic functions
What Is the resting temperature of blood
38 degrees celsius
How viscous is blood
5 times more viscous and cohesive than water
What is the ph of blood
7.4 (slightly alkaline)
How low can high intensity exercise make ph
6.7 (acidic)
How much of the human body mass is due to blood volume
7%
What is blood distribution at rest
5L/minute
What is blood distribution during exercise
20-40L/minute
What is venipuncture (phlebotomy) and why is it a chosen blood collection technique
Blood is taken from a superficial vein, often for medical analysis.
It is chosen because:
superficial veins are easy to locate
They have thinner walls than arteries
Lower blood pressure allows quick wound sealing
What are the composition percentages of blood
46-63% plasma
37-54% formed elements
What does the term haematocrit mean
It is a medical term that describes the percentage of cellular elements to total blood volume
What are normal haematocrit values for men and women
men - 40-52%
women -36-48%
What is plasma made of
92% H20
7% plasma proteins
-60% Albumins
-35% Globulins
-4% Fibrinogen
1% other solutes
-Nutrients
-Electrolytes
-Organic wastes
