BIO 203 Lecture Notes - Lecture 13: Solution, Fibrinogen, Blood Cell

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Published on 11 Apr 2019
Functions of blood
Composition of blood
Blood cell disorders
Blood types
Functions of blood
Transportation system
Protection (against disease-causing agents, clotting)
Regulation (pH, temperature)
Composition of the blood
Blood is a connective tissue
Blood is thicker than water
Cell suspension on its watery fluid
1 drop of blood carries 250 million cells
Watery fluid=plasma
Cellular elements=formed elements
Plasma: liquid that makes up about 55% of blood
Composition of plasma
About 93% water
7% consists of dissolved substances: ions, dissolved gases,
hormones, plasma proteins, and waste products
Formed elements
Cellular components of blood
Make up about 45% of blood
Plasma proteins (7-8% of the plasma)
Help balance water flow between blood and cells
General categories
Important for blood’s water-balancing ability
Transport lipids and fat-soluble vitamins
Some are antibodies
Clotting proteins
Example: fibrinogen
Formed elements and platelets
Stem cells within red bone marrow give rise to the formed elements
Red blood cells
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