1. 2.02 Understand the functions and disorders of the circulatory system
What are the functions of the circulatory system?
2.02 Understand the functions and disorders of the circulatory system 1

2. Vessels of the circulatory system
Arteries
Describe arterial blood:
Dark red in color, highly oxygenated
2.02 Understand the functions and disorders of the circulatory system 2

3. Vessels of the circulatory system
ARTERIES
What are the functions of arteries?
To push oxygenated blood around the body so that the cells can receive oxygen and nutrients
2.02 Understand the functions and disorders of the circulatory system 3

4. Vessels of the circulatory system
ARTERIES
What are the characteristics of arteries?
Muscular and thick walled due to the fact that they have to push the blood around the body
2.02 Understand the functions and disorders of the circulatory system 4

5. Vessels of the circulatory system
ARTERIES
Which direction do arteries flow?
Push or flow blood away from the heart to the cells
2.02 Understand the functions and disorders of the circulatory system 5

6. Vessels of the circulatory system
Veins
Describe venous blood:
Dark blue, violet in color, deoxygenated
2.02 Understand the functions and disorders of the circulatory system 6

7. Vessels of the circulatory system
VEINS
What is the function of veins?
Push or flow deoxygenated blood back to the heart.
2.02 Understand the functions and disorders of the circulatory system 7

8. Vessels of the circulatory system
VEINS
What are the characteristics of veins?
Thin walled, collapse easily when not filled from dehydration.
Not muscular but have valves stop blood from flowing backwards
2.02 Understand the functions and disorders of the circulatory system 8

9. Vessels of the circulatory system
VEINS
Which direction do veins flow?
Push or flow blood towards the heart to get more oxygen
2.02 Understand the functions and disorders of the circulatory system 9

10. Vessels of the circulatory system
Arteries vs Veins
Arteries
Veins
Muscular and thick walled
Thin with valves
Oxygenated blood
Deoxygenated blood
Flow away from heart
Flow towards heart
Red to bright red
Dark blue or violet
2.02 Understand the functions and disorders of the circulatory system 10

11. Vessels of the circulatory system
What are capillaries?
They are the smallest blood vessels and can only be seen through a compound microscope.
They are a single endothelial cell layer thick. 11

12. Vessels of the circulatory system
Capillaries
What is the function of capillaries?
To connect the arterioles with venules.
2.02 Understand the functions and disorders of the circulatory system 12

13. Vessels of the circulatory system
Capillaries
What happens if this action is obstructed?
If blocked nutrients and oxygen cannot get through to the cells
2.02 Understand the functions and disorders of the circulatory system 13

14. Nutrients in blood & circulatory system
Circulatory system plays a vital role in homeostasis
Absorption and transport of nutrients to cells, tissues,organs, and systems.
Vitamin K - prevents hemorrage
Vitamin E - prevents hemolysis
Vitamin B12 - prevents anemia
Calcium aids in blood clotting
2.02 Understand the functions and disorders of the circulatory system 14

15. 2.02 Understand the functions and disorders of the circulatory system
Remember Pulse Sites?
Where do they come from? They come from any place that allows an artery to compressed against a bone.
Radial
Temporal
Brachial
Facial
Ulnar
Carotid
Popliteal
tibialis
Femoral
dorsalis pedis
2.02 Understand the functions and disorders of the circulatory system 15