Blood vessels


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  • Label the diagrams in their workbooks
  • What is collagen?
    Why does tunica media have mainly muscle?
    What is vasoconstruction and vasodilation?
    How does tunica intima control blood vessel diameter?
  • Why does the artery have more elastic tissue and smooth muscle than vein?
  • Copy In Workbooks
    1.Why are arteries needed to be strong?
    2. What is meant by high pressure?
    3.Why do arterioles need to control blood flow?
  • 1.Draw vein valves and link to varicose vein
    2. Why do veins have less walls than that of artery
  • Work Books
  • Blood vessels

    1. 1. Blood Vessels Cardiovascular System Lloyd Dean
    2. 2. Recap This is a link to purposegames. Use this. If you cannot access this/find it on the internet then go into BlackBoard, upload this file and click through this link!
    3. 3. True of False (Thumbs up and down) 1. The left side of the heart has a smaller 2. 3. 4. 5. myocardium then the right side There are 5 heart valves Stroke volume is the amount of blood ejected from the heart per contraction Vena Cava is the largest vein The aorta send oxygenated blood from the heart to the lungs
    4. 4. Aims By the end of the lesson you should be able to: Describe the structure and function of the different blood vessels (Task 1) State how vasodilation and vasoconstriction occur (Task 1) Recall diseases with blood vessels
    5. 5. Now… The blood vessel family!
    6. 6. Structure of Blood Vessels
    7. 7. Structure of Layers Tunica Externa / Adventitia  Outer layer  Largely made up of collagen and elastin fibers  Supports blood vessel by being shock absorber Let’s see vasodilation and vasoconstriction! Tunica Media  Middle layer  Mainly smooth muscle with elastic layers and collagen  Used for vasoconstriction and vasodilation Tunica Intima  Composed of smooth epithelial cells named endothelium  Minimises friction between moving blood
    8. 8. Explain this for part of the merit criteria
    9. 9. Artery / Arterioles Arteries Pumps oxygenated blood to the body Have narrow lumens Strong as pumping blood at high pressure (Pinterest, 2013) Arterioles Branches into smaller arteries (arterioles) when nearer tissue More smooth muscle to control blood flow
    10. 10. Capillaries Thinnest blood vessel Made of single layer of endothelial cells Bring blood as close as possible to all cells Exchange of oxygen, carbon dioxide, water, salts, between the blood and the surrounding body tissues takes place Large quantities cover the muscle, ensuring efficient exchange of gases (Pinterest, 2013)
    11. 11. (Pinterest, 2013) Veins / Venules Venules Vessels formed from capillaries Drains blood from capillaries into veins Veins Have same walls as artery but less thinner, elastic and muscular Pressure and speed of blood is low Wider Lumen than artery Have valves that prevent backflow of blood
    12. 12. Task Let’s make some blood You need to: vessels -Create a vein and artery Play – doh -Apply the structures we have Scissors discussed so far -Represent blood vessel disease (If you have time) Marker pens Straws
    13. 13. Comparison of Blood Vessels Feature Artery Capillary Vein Tunica Externa √ X √ Tunica Media Thick X Thinner Tunica Interna √ √ √ Size of Lumen Small Microscopic Large Valves X X √
    14. 14. Task What can happen if we do not look after the blood vessels? What this video and then fill in your story board. Tell your study buddy what you think is happening here? This will help to give you a focus!
    15. 15. What can happen if we do not look after the blood vessels? Arteriosclerosis describes a number of conditions The thickening of the arteries which results in loss of elasticity Can lead to heart attacks and strokes Most common form is atherosclerosis Build up of fatty substances, such as cholesterol Results in formation of plaque in arteries Hypertension (High blood pressure) can also lead o loss of elasticity
    16. 16. What lifestyle changes can be made to reduce the risk of arteriosclerosis Give up smoking Keep cholesterol levels at a safe limit Improve diet Control weight Reduce stress
    17. 17. Biliography Pinterest. 2013. INFO. [online] Available at: [Accessed: 2 Dec 2013]. Pinterest. 2013. Sketchbooks. [online] Available at: [Accessed: 2 Dec 2013]. Pinterest. 2013. Nursing. [online] Available at: [Accessed: 2 Dec 2013].