Question 2. The base of the heart is formed by the _____. right atrium and right ventricle
| Question 2. The base of the heart is formed by the _____. right atrium and right ventricle left atrium and left ventricle ventricles atria interventricular septum |
| Question 3. Which layer of the heart consists of endothelial cells? Epicardium Myocardium Endocardium Fibrous pericardium Serous fluid |
| Question 4.The muscular ridges within the anterior wall of the right atrium that extend into the auricle are called the _____. pectinate muscles trabeculae carneae coronary sulci papillary muscles chordae tendineae |
| Question 5.Blood passes from the right ventricle into the pulmonary arteries through the _____. |