1. CIRCULATORY ROUTES

3. Systemic circulation
Arteries carry oxygenated blood to all body tissue (except alveoli of lungs); veins deoxygenated blood (with CO2) back to heart
Major vessels: aorta, superior/inferior vena cava

4. 2. Pulmonary circulation
Shorter
Arteries: thinner walls, less elastic tissue, larger diameter (resistance?)
Deoxygenated blood (CO2 rich) to lungs and oxygen-rich back to heart
Pulmonary trunk, pulmonary arteries/veins

6. 3. Hepatic portal circulation
Carries venous blood (nutrient-rich) from gastrointestinal tract to liver
Liver: glucose  glycogen (storage), detoxifies, destroys bacteria

7. 4. Coronary route: Supplies oxygen/nutrients to heart cells
Coronary arteries branch from ascending aorta and encircle heart, into capillaries, then into coronary veins (drain deoxygenated blood into right atrium)

8. WARNING: placenta on next slide
5. Fetal circulation
Placenta
Umbilical cord: 2 arteries (fetal waste), 1 vein (fetal nutrients)
Ductus venosus: by-passes (skips) most liver
Foramen ovale: between atria; by-pass lungs
Ductus arteriosus: connects trunk to aorta: by-pass lungs
WARNING: placenta on next slide

9. PLACENTA WITH UMBILICAL CORD