BIO 203 Lecture Notes - Lecture 13: Solution, Fibrinogen, Blood Cell
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Published on 11 Apr 2019
School
Department
Course
Professor
Blood
Outline:
● 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
■ Albumins
● Important for blood’s water-balancing ability
■ Globulins
● 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