1. Part 3: Blood Vessels function structure -location
Circulatory System
Part 3: Blood Vessels
function
structure
-location

2. Types of Blood Vessels
Arteries
Veins
Capillaries

3. 1. Arteries- function Carry blood AWAY from the heart
Deliver oxygenated blood to body (systemic)
Deliver deoxygenated blood to the lungs (pulmonary)

4. 1. Arteries- structure Thick walled Elastic
Artery walls can expand due to the increased pressure from pumped blood
Walls rebound after each contraction (pulse)

5. 1. Arteries- location Deeper in tissue along bones
More protected from injury/ temp loss
Pressurized vessels- high blood loss if severed

6. 2. Veins- function Carry blood BACK TO the heart
Transport deoxygenated from body tissue (systemic)
Transport oxygenated from lungs(pulmonary

7. 2. Veins- structure Thin walled
Don’t receive large amounts of blood so no need for elastic walls (low pressure)
Contain valves- prevents back flow
Blood movement do to muscle activity in the body

8. 2. Veins- location Closer to surface
Often surrounded with skeletal muscle
Lower pressure= less blood loss if severed

9. Arterioles and Venules
Small arteries and veins
Same features but smaller scale
Arterioles have sphincter muscles which can dilate/ contract to regulate BP/ flow
Blood temp is regulated this way
 blood flow to surface= temp loss
To prevent temp loss (when it is cold) blood is prevented from going (white lips/ fingertips)

10. 3. Capillaries- function
Connects arteries to veins
Delivery of water, oxygen, and nutrients to tissue
Pick up water and waste from extracellular fluid

11. 3. Capillaries- structure
Very thin walls
Single layer of cells

12. 3. Capillaries- location
Everywhere
Within a few cells of each other
Needs to provide nutrient and gas exchange to all cells

13. Major Blood Vessels Aorta
Major blood vessel carrying blood out of heart
Leaves left ventricle and loops over top of heart- Aortic Arch
Descends along inside of backbone as dorsal aorta
Branches off to feed all the body systems (except lungs)

14. Major Blood Vessels 2. Coronary Arteries/ Veins
First branches off aorta
Surface of heart
Artery provides heart with nutrients
Vein takes deoxygenated to vena cava

15. Major Blood Vessels 3. Carotid Arteries Take blood to head
Specialized with nerve ending
Chemoreceptors (O2 levels)
Pressure receptors (BP)

16. Major Blood Vessels 4. Jugular Veins Match carotid artery
Bring blood from head to anterior vena cava
No valves (gravity)

17. Major Blood Vessels 5. Subclavian arteries/ veins
Arteries originate from aorta
Pass under the clavicle and branch to feed arms (brachial artery) and chest

18. Major Blood Vessels 6. Mesenteric artery/ vein 7. Hepatic Portal Vein
Artery branches off dorsal aorta
Subdivides and goes into intestines
7. Hepatic Portal Vein
Transports nutrients from intestine to liver
8. Hepatic Vein
Blood leaving liver goes to inferior vena cava

19. Major Blood Vessels 9. Renal Arteries/ Veins
Artery branches off of dorsal aorta through lower back to kidneys
Vein takes blood from kidneys to posterior vena cava

20. Major Blood Vessels 10. Iliac Arteries/ veins
Dorsal aorta divides at pelvic region into 2 iliac arteries, one going down each leg
Femoral artery (quadriceps) is a major branch of each iliac artery

21. Major Blood Vessels 11. Superior / Inferior vena cava
Collect all blood from veins of systemic circuit and conducts back to right atrium

22. Major Blood Vessels 12. Pulmonary Arteries/ Veins
Composes the pulmonary circuit
Artery takes deoxygenated blood to lungs
Vein takes oxygenated blood to the left atrium

23. Summary
What to know??
-Arteries vs veins vs capillaries in terms of structure/ function/ location
-Names and locations of major vessels