1. BLOOD VESSELS

2. ARTERIES FUNCTION – CARRIES OXYGENATED BLOOD AWAY FROM THE HEART
EXCEPTION: PULMONARY ARTERY – CARRIES DEOXYGENATED BLOOD AWAY FROM HEART TO LUNGS
MADE OF LAYERS OF SMOOTH MUSCLES AND CONNECTIVE TISSUE (COLLAGEN, ELASTIC FIBERS)

3. ARTERIES
HIGH BLOOD PRESSURE, THICKNESS TO SEND BLOOD THROUGHOUT THE BODY
DEEPLY LOCATED IN BODY
EXAMPLES – CORONARY (heart), AORTA (main artery out of heart), CAROTID (neck  brain), FEMORAL (thigh)

4. ATHEROSCLEROSIS

5. CEREBRAL ARTERIES IN BRAIN

7. VEINS FUNCTION – CARRIES DEOXYGENATED BLOOD TOWARDS THE HEART
EXCEPTION: PULMONARY VEIN – CARRIES OXYGENATED BLOOD FROM LUNGS TOWARD HEART
THINNER WALLS WITH LOWER PRESSURE
NECK + LIMBS HAVE TWO SETS OF VEINS: DEEP AND SUPERFICIAL  OFTEN USED TO REGULATE BODY TEMPERATURE AND DRAW BLOOD ETC.

8. VEINS
TO ALLOW BLOOD FLOW TO OPPOSE THE FORCE OF GRAVITY AND PREVENT BACKFLOW, VEINS CONTAIN ONE-WAY VALVES FORMED FROM FOLDINGS OF INNER CONNECTIVE TISSUE
SURROUNDING SKELETAL MUSCLE CONTRACTIONS ALSO HELP PUSH BLOOD UP TOWARDS THE HEART

9. VEINS
EXAMPLES – SUPERIOR & INFERIOR VENA CAVA (main vessels back to heart), JUGULAR (neck)

10. $$ in the BANK
VASOCONSTRICTION: making diameter of blood vessels smaller  LESS blood flow, HIGHER blood pressure
VASODILATION: making diameter of blood vessels larger  MORE blood flow, LOWER blood pressure
Change due to body temperature, hormones, carbon dioxide/oxygen levels etc.

11. Blood is warmer than the body and can help regulate body temperature
Blood vessels dilated superficially easily lose heat

12. CAPILLARIES
FUNCTION – WHERE MATERIALS (OXYGEN, WATER, CARBON DIOXIDE, GLUCOSE) ARE EXCHANGED BETWEEN BLOOD AND TISSUE (SKELETAL MUSCLE, ORGAN, BRAIN ETC.)
VERY SMALL IN DIAMETER  WALLS ARE ONLY ONE CELL THICK!

13. CAPILLARIES
DIFFUSION TAKES PLACE TO EXCHANGE GASES (high  low concentration), OSMOSIS FOR WATER, ACTIVE TRANSPORT OF OTHER MATERIALS INTO CELLS
LARGE NETWORK  “CAPILLARY BED”

14. CAPILLARY BED