The Blood System

Home > Lesson > The Blood System

The Blood System



The blood system



6.2 Concept mapping

6.2 Knowledge control

6.2 Presentation

6.2 Video/Animation

6.2 Past paper questions

Picture of the lesson

Essential idea:

6.2.1  The blood system continuously transports substances to cells and simultaneously collects waste products.


Circulatory system lesson Blood/index.html/Blood

Hemoglobin Breakdown

Blood typing game /Circulatory system

The Cardiac Cycle

Cardiac cycle Cardiac Cycle 1

The Cardiac Cycle 2

The Cardiac Cycle 3


Blood and circulation interactive lesson

Blood typing/ Cytotoxic (Type II Hypersensitivity)

 Fetal Circulatory System(You are not responsible)


Nature of science:


6.2.2  Theories are regarded as uncertain—William Harvey overturned theories developed by the ancient Greek philosopher Galen on movement of blood in the body. (1.9)




6.2.3  Arteries convey blood at high pressure from the ventricles to the tissues of

the body.


Blood flow through the Human Heart


6.2.4  Arteries have muscle cells and elastic fibres in their walls.


6.2.5  The muscle and elastic fibres assist in maintaining blood pressure between pump cycles.


6.2.6  Blood flows through tissues in capillaries. Capillaries have permeable walls that allow exchange of materials between cells in the tissue and the blood in the capillary.


Animation of blood system



6.2.7  Veins collect blood at low pressure from the tissues of the body and return it to the atria of the heart.


Heart Animation


6.2.8  Valves in veins and the heart ensure circulation of blood by preventing



Heart virtual body


6.2.9  There is a separate circulation for the lungs.


Heart Contraction and Blood Flow



6.2.10 The heart beat is initiated by a group of specialized muscle cells in the right atrium called the sinoatrial node.


Animated GIF image of a single human heart muscle cell beating

Pumps Your Blood - Happy Days


 Pumps Your Blood - With Words

Mechanical Events of the Cardiac Cycle


 Heart pump operation


6.2.11  The sinoatrial node acts as a pacemaker.


Conducting System of the Heart animation Conducting System of  the Heart


Electrical Activity of the Heart



6.2.12  The sinoatrial node sends out an electrical signal that stimulates contraction as it is propagated through the walls of the atria and then the walls of the ventricles.


6.2.13  The heart rate can be increased or decreased by impulses brought to the

heart through two nerves from the medulla of the brain.


Cardiac Cycle and Electrical Activity Review



6.2.14  Epinephrine increases the heart rate to prepare for vigorous physical activity.




6.2.15  Application: William Harvey’s discovery of the circulation of the blood with the heart acting as the pump.


6.2.16  Application: Pressure changes in the left atrium, left ventricle and aorta

during the cardiac cycle.


 Pressure and Volume Changes in the Heart


ECG game




6.2.17   Application: Causes and consequences of occlusion of the coronary arteries. Grade 12 Biology: The Cardiovascular System/ İTunes/Apps


 Worksheets of Transport System


Worksheets of Transport System




6.2.18   Skill: Identification of blood vessels as arteries, capillaries or veins from the structure of their walls.


6.2.19   Skill: Recognition of the chambers and valves of the heart and the blood

vessels connected to it in dissected hearts or in diagrams of heart structure.


Theory of knowledge:


6.2.20  Our current understanding is that emotions are the product of activity in the brain rather than the heart. Is knowledge based on science more valid than

knowledge based on intuition?




6.2.21  Understanding of the structure of the cardiovascular system has allowed the development of heart surgery.


6.2.22  Syllabus and cross-curricular links:


Topic 2.2 Water

Topic 2.3 Carbohydrates and lipids

Topic 6.4 Gas exchange

Topic 6.6 Hormones, homeostasis and reproduction




6.2.23  Aim 6: A heart dissection is suggested as a means of studying heart structure.


6.2.24  Aim 8: The social implications of coronary heart disease could be discussed.


Atherosclerosis/Heart Attack


Interactive animation of cholesterol





Recent Lessons