Blood Cells (Extended Study) HL only

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Blood Cells(Extended Study) HL only
3.2.3.H
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First revise 3.2.2(Basic details about blood
and blood cells) HL OL
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Learning objectives
1. Details of red blood cell structure function

• Details of two types of white blood cells
• (a) Lymphocytes
• (b) Monocytes

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Composition of Blood
Plasma Liquid part of the blood
Red Blood Cells
White Blood Cells
Platelets
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Functions of blood parts
Plasma
Composed of mainly water which acts as a
transport medium for the cells and dissolved
substances
Carry Oxygen
Red Blood Cells
Fight Infection
White Blood Cells
Platelets
Clotting
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Red Blood Cells
Biconcave discs gives large surface area
No Nucleus
No mitochondria
Contain Haemoglobin(has a high affinity for
oxygen)
Flexible Cell membranes
Made in bone marrow of ribs sternum
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White Blood Cells
Have a Nucleus
No definite shape
Formed in bone marrow and mature in spleen
Protect against disease
Two types
1. Lymphocytes
Produce antibodies
2. Monocytes
Engulf microorganisms
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PLATELETS
Cell fragments
No nucleus
Made in bone marrow
Function in clotting
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Plasma
Composed of mainly water which as a transport
medium for the cells and dissolved substances
Dissolved substances include
Digestion products .Glucose, amno acids, Fatty
acids, glycerol, minerals and vitamins
Waste.Carbon dioxide, urea
Hormones.eg Insulin
Antibodies
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Learning check
1. List four ways, other than colour, in which
red blood cells are different from ordinary body
cells
2. Name the chemical in red blood cells that has
a high affinity for oxygen
3. Name two types of white blood cells and
give the function of each type
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See also
Section 3.2.2 Organisational Complexity of the
Human for introduction to Blood and Circulation
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End