Term
| location and orientation of the heart |
|
Definition
| middle of the of chest slightly the left between the 2 & 5 intercostal space. Lies on the superior suface of the daiphram in the anterior half |
|
|
Term
|
Definition
from interior out
1 endocardium
2 myocardium
3 epicardium |
|
|
Term
| functions of each heart valve |
|
Definition
| antrioventicular (tricuspid & mitral) prevent backflow to atria when ventricles are contracting. The pulmonary and aortic valves (semilunar valves) prevent backflow into ventricles when ventricles are relaxing |
|
|
Term
| describe the flow of blood through the heart,pulmonary & systemic circuits |
|
Definition
Blood returns to the heart from the body via the superior vena cava and the inferior vena cava. This blood is O2 poor.
blood first enters the right atrium, flows through the tricuspid valve into the right ventricle. When the heart beats, the ventricle pushes the blood through the pulmonic valve into the pulmonic artery,carries blood to the lungs where it “picks up” oxygen, and leaves the lungs and returns to the heart through the pulmonic vein. The blood enters the left atrium, then through the mitral valve into the left ventricle,then pumps blood through the aortic valve, and into the aorta, the blood vessel that leads to the rest of the body. |
|
|
Term
| What is the pulmonary circuit |
|
Definition
| The right side of the heart, O2 poor blood enters right atrium and passed into right veentricle pumps into lungs |
|
|
Term
| What is the systemic circuit |
|
Definition
| left side of the heart O2 rich blood enters left atrium from the lungs flows into left ventricle then into aorta which supplies Os2 rich blood to the all body organs, systemic circuit veins return O2 poor blood to the heart. |
|
|
Term
|
Definition
| branching, striated, generally uninucleate cals They contain myofibils consisting of typical sarcomeres. |
|
|
Term
| What is the role of the pericardium? |
|
Definition
| It facilitates heart contraction |
|
|
Term
| The lining of the heart chambers is called the: |
|
Definition
|
|
Term
| The superior chambers of the heart are called the: |
|
Definition
|
|
Term
| Name the 4 chambers of the heart |
|
Definition
| right atrium, right ventricle, left atrium, and left ventricle. The atria are the superior chambers; the ventricles are inferior to the atria. |
|
|
Term
|
Definition
| fibrous sac that encloses the heart. It protects the heart, prevents the heart from overfilling with blood, and anchors the heart to surrounding structures. |
|
|
Term
| The superior chambers of the heart are called the: |
|
Definition
|
|
Term
| The role of the atrioventricular node (AV node) is to: |
|
Definition
| slow down impulses so that the atria can contract to fill the adjacent ventricles with blood |
|
|
Term
|
Definition
| the amount of blood pumped out of each ventricle in one minute |
|
|
Term
| sequence of current flow through the heart wall |
|
Definition
| Impulses generated by the SA node spread to the AV node, then to the bundle of His, then to the bundle branches, and finally the Purkinje fibers |
|
|
Term
| Identify the correct sequence of blood flow through the chambers of the heart. |
|
Definition
| Right atrium, right ventricle, lungs, left atrium, left ventricle |
|
|
Term
| The pacemaker of the heart is the: |
|
Definition
|
|
Term
| The trabeculae carneae are located in the: |
|
Definition
| The trabeculae carneae are located in the ventricles. |
|
|
Term
| What part of the heart is considered the systemic circuit pump? |
|
Definition
| The left ventricle is considered the systemic circuit pump. |
|
|
