External Anatomy of the Heart 5 B. 3 C. 2 D. Pulmonary artery E. Aorta 3. F. Vein G. Inferior vena cava 4. H. A Contracting heart muscle 5. j. Right coronary artery, left coronary artery k. Aorta 6. l. B 7. m. Because it travels along the margin of the heart 8. n. D

Internal Anatomy of the heart 4 Atria Ventricles Superior and inferior vena cava Sends deoxygenated blood from right ventricle to lungs Bring oxygen rich blood from the lungs to the left atrium Between the right atrium and right ventricle Between the left atrium and left ventricle Deoxygenated blood Oxygenated blood Sends O2 rich blood from the left ventricle to the body.

Power Notes – 30.3 From: Upper body To: the lungs From: the lungs To: The upper body To: The lungs From: The lungs To: the lower body 8. From: Lower body Right atrium: Blood from upper/lower body enters, pumped to right ventricle Right ventricle: Blood pumped to lungs Left atrium: Blood from lungs enters, pumped to left ventricle Left ventricle: Blood pumped to rest of body

Chapter 30.4 Study guide Y Diagram: Arteries Veins: Both: Made of 3 layers with thick muscle, elastic fibers Smaller arteries called arterioles connect to capillaries. Veins: Made of 3 layers, larger diameter, thinner walls. Valves and skeletal muscles keep blood moving Smaller veins called venules connect to capillaries Both: Made of the same 3 layers of tissues Smaller vessels that connect to capillaries

30.4 Study guide continues… 1. Capillaries are much smaller than veins and arteries and have only one layer, Walls are one cell thick Materials diffuse easily into and out of them Form dense networks 2. The force with which blood pushes against an artery 3. Systolic: The pressure on the artery wall when the left ventricle contracts. Diastolic: The pressure in the artery when the left ventricle relaxes. 4. Untreated, it can lead to heart attack and stoke. 5. Thickened artery walls (or arteriosclerosis), blocked arteries (or atheriosclerosis), Hypertension 7. Balloon angioplasty 8. Bypass surgery 9. Heart attack 10. Stroke 11. Systolic pressure = the ventricle contracts Diastolic pressure = the ventricle relaxes or expands

Blood vessels worksheet Arteries Veins Aorta Distributing arteries Arterioles Capillaries In the capillaries Like a net made of extremely small tubes. Venule Left and right common carotid artery Left and right external and internal jugular veins Left subclavian artery Left subclavian vein Left femoral artery Great saphenous vein

16. A 17. B 18. C 19. Oxygen and nutrients 20. Carbon dioxide and wastes 21. A vein is a larger blood vessel than a venule. The venule bring blood from the capillaries to the vein. 22. They carry blood to the rest of the body. 23. An artery that travels through the thigh – femur is the thigh bone. 24. Capillaries have extremely thin walls and high pressure would burst them.