26 notecards = 7 pages (4 cards per page)
-carries blood to and from the gas exchange surfaces of the lungs
-carries blood to and from the body
-carry blood AWAY from the heart
carry blood TO the heart
-microscopic thin-walled vessels
Each day the heart pumps about _____ liters of blood.
The heart is about the size of a clenched _____.
Four Chambers of the Heart
-receives blood from the systemic circuit and then passes through right ventricle
-pumps blood to the pulmonary circuit
-collects blood from the pulmonary circuit and empties it into the left ventricle
pumps blood to the systemic circuit
When the heart beats, first the _____ contract, and then the ______ contract.
The heart is located near the ________ chest wall, directly posterior to the ______.
inferior, pointed tip of the heart
Pericardial Sac/Fibrous Pericardium
-surrounds the heart
-double lining of the pericardial cavity
-the space between the visceral and parietal pericardium
acts as a lubricant, reducing friction between the opposing surfaces as the heart beats
-a deep groove that marks the border between the atria and ventricles
Anterior Interventricular Sulcus and Posterior interventricular sulcus
shallow depressions that mark the boundary between the left and right ventricles
-covers the outer surface of the heart
-muscular wall of the heart
-covers the inner surface of the heart
Characteristics of Muscle Cells
-interconnected by intercalated discs
-transfer the force of contraction from cell to cell and propagate action potentials