Vocabulary
The microscopic vessels that lie between arteries and veins where gas and nutrient exchange occur.
Capillaries
The state of contraction in the heart.
Systole
The pointed, inferior portion of the heart, known as the ________, rests on the diaphragm and is oriented toward the left hip.
Apex
The valve that passes blood from the left atrium into the left ventricle.
Mitral Valve
The average heart beats about ________ times per minute.
75 bpm
The closed pathway of the cardiovascular system that sends oxygen-rich blood and nutrients to all body cells and removes wastes.
Systemic Circuit
The wall-like divide between that separates the atrium and ventricle on the right side from those on the left.
Septum
When viewing a dissected heart, it is easy to visually discern the right and left ventricles by ________.
Thickness of ventricle walls
The lowest pressure that remains in the arteries before the next ventricular contraction.
Diastolic Pressure
Normal heart sounds are caused by what?
closure of the heart valves
A recording of the electrical changes in the myocardium during a cardiac cycle.
Electrocardiogram (ECG)
What is the thick middle layer of the wall of the heart?
Myocardium
The tissue that forms a loose-fitting sac around the heart is the
fibrous
pericardium.
The sum of the formed elements and plasma volumes in the vascular system.
Blood Volume
The transportation of blood from the right side of the heart to the lungs and back to the left side of the heart is known as ________ circulation.
Pulmonary
The alternate expanding and recoiling of the arterial wall that can be felt in an artery running closing to the body’s surface.
Pulse
The valves located between the atria and ventricles are known as the ________ valves.
AV Vales (atrioventricular)
The outermost layer of the wall of the heart that protects the heart by reducing friction.
Epicardium
True or False: The myocardium receives its blood supply from the coronary arteries.
True
A mass of cells that act as a unit.
Functional Syncytium
These veins drain blood from the face, scalp, and superficial regions of the neck.
External Jugular Veins
When the ventricular walls contract, what two valves CLOSE?
Bicuspid (mitral) and Tricuspid
___________ cavity is the potential space between the parietal and visceral pericardial membranes.
Pericardial
Which vessel(s) of the heart receive(s) blood from the right ventricle?
pulmonary trunk
Name the self-exciting tissue of the heart.
Sinoatrial Node