Physiology II Midter m ( Ar izona
Collage of Nu r sing) Question s and
answ er s w ith accu r ate
r ationales(PASSED)
Know the function of the CVS - answer Includes the heart, Vessels,
arteries, veins, and capillaries. These vessels transport blood which
carries oxygen, nutrients, hormones, enzymes, and waste. Carry oxygen
and nutrients to cells in the body to make chemical energy (ATP).
Describe the layers of the pericardial sac: Fibrous pericardium - answer
Tough fibrous connective tissue, connects to large blood vessels that
enter and leave the heart, diaphragm muscles, sternal wall of the
thorax, anchors heart in mediastinum. Prevents overdistention of the
pumping heart by acting as tough protective membrane that surrounds
the heart.
Describe the layers of the pericardial sac: Serous pericardium
(epicardium) - answer Thin and delicate layer. Continuous with the
outermost layer of the wall of the heart. Continuous with large blood
vessels.
The layers of the heart wall:
, Outermost layer: Epicardium (visceral pericardium) - answer Thin
transparent membrane, serous tissue, and mesothelium.
The layers of the heart wall:
Outermost layer: Space between epicardium and pericardium:
Pericardial cavity - answer Contains watery fluid called pericardial fluid,
reduces friction and erosion of tissue between membranes.
The layers of the heart wall: Bulk of the heart: Myocardium - answer
Cardiac muscle tissue. Involuntary, striated.
The layers of the heart wall:
Innermost layer of the heart wall: Endocardium - answer Thin layer that
overlies the connective tissue. Covers the valves of the heart.
The chambers of the heart: - answer The right atrium, the right
ventricle. The left atrium, the left ventricle.
The great vessels of the heart: - answer The superior and inferior vena
cava. The coronary sinus. The pulmonary trunk, right pulmonary artery,
left pulmonary artery. Pulmonary veins. Ascending aorta, coronary
arteries, arch of the aorta, descending thoracic aorta, abdominal aorta.