blood cells (extended study) hl only
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Blood CellsBlood Cells
(Extended Study) (Extended Study) HL onlyHL only
3.2.33.2.3
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First revise 3.2.2First revise 3.2.2
(Basic details about blood and blood cells) (Basic details about blood and blood cells) HL & OLHL & OL
Learning objectivesLearning objectives
1. Details of red blood cell structure &function
2. Details of two types of white blood cells
(a) Lymphocytes
(b) Monocytes
Composition of BloodComposition of Blood
Plasma Liquid part of the blood
Red Blood Cells
White Blood Cells
Platelets
Functions of blood partsFunctions of blood parts
Plasma
Red Blood Cells
White Blood Cells
Platelets
Composed of mainly water which acts as a transport medium for the cells and dissolved substances
Carry Oxygen
Fight Infection
Clotting
Red Blood CellsRed Blood Cells
Biconcave discs ……gives large surface area
No Nucleus
Flexible Cell membranes
Made in bone marrow of ribs & sternum
Contain Haemoglobin…(has a high affinity for oxygen)
No mitochondria
White Blood CellsWhite Blood Cells
Two types
Have a Nucleus
1. Lymphocytes
Formed in bone marrow and mature in spleen
2. Monocytes
Protect against disease
No definite shape
Produce antibodies
Engulf microorganisms
PLATELETSPLATELETS
Cell fragments
Made in bone marrow
No nucleus
Function in clotting
PlasmaPlasmaComposed 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
Learning checkLearning 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
See alsoSee also
Section 3.2.2 Organisational Complexity of the Human for introduction to Blood and ciriculation
EndEnd
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