Blood 1 Flashcards
Body weight percentage of blood
8%
Average volume of blood in F/M
F - 5L
M - 5.5L
What does blood consist of ?
Consists of 3 types of specialized cellular elements
suspended in plasma
What are the three types of cells in blood?
- Erythrocytes
- Leukocytes
- Platelets
What are erythrocytes?
Red blood cells
What are erythrocytes important for?
Important for O2 transport
What are leukocytes
White blood cells
What is the function of leukocytes?
Immune system’s mobile defense units
What are platelets?
Cell fragments
What are platelets important in?
Important in hemostasis
Percentage of blood that is plasma
55%
What percentage of plasmas total weight do plasma proteins compose?
6% to 8%
What are the three groups of plasma proteins?
- Albumins
- Globulins
- Fibrinogen
What are the most abundant plasma proteins?
Albumins
What are the three subclasses of globulins?
- Alpha (α) –
- Beta (β) –
- Gamma (γ)
Alpha (α) globulins function
Transport molecules eg. a1 antitrypsin
Beta (β) globulins function
Inactive precursor proteins eg proteases
Gamma (γ) globulins function
Immunoglobulins (antibodies)
What is the function of fibrinogen?
A key factor in blood clotting
What are the only solutes which do not pass freely
between plasma and interstitial fluid?
Proteins
What can proteins exert across capillary walls?
Exert a significant osmotic effect across capillary walls
What is the osmotic effect of proteins important for?
In distribution of ECF between vascular and interstitial compartments so important in the maintenance of circulatory volume
How much of plasma is composed of water?
90%
What is the function of water in plasma?
Transport medium, carries heat