#1
What is the Visceral layer of serous pericardium?
What consists of cardiac muscle; muscle arranged in circular spiral patterns?
Endothelium resting on a layer of connective tissue; lines the internal walls of the heart is called?
Epicardium
Myocardium
Endocardium
Internally, the right atrium has two parts: a smooth walled posterior part and an anterior part lined by horizontal ridges called the ___________________.
The walls of both ventricles are marked with these irregular ridges of muscle called __________.
Pectinate Muscles
Trabeculae Carneae
What are the major vessels returning blood to the heart?
Superior and inferior venae cavae, right & left pulmonary veins.
What receives oxygen poor blood from the superior and inferior vena cava and the coronary sinus, and pumps it into the right ventricle through the tricuspid valve.
The right atrium
What are the (x 2): inferior chambers, separated by the inter ventricular septum), that pumps blood around the two circuits?
Ventricles
What attaches to the flaps (cusps) of the tricuspid valve?
Chordae Tendineae
What splits into right and left pulmonary arteries?
The _____ carries blood away from the heart and has three branches. What is its name and what are the three branches?
Pulmonary trunk
Ascending Aorta. Branches:Brachiocephalic, left common carotid, and left subclavian artery
What is the function of the heart?
A muscular double pump with two functions: receiving oxygen poor blood and oxygenated blood
______ receives oxygenated blood from the left atrium via the bicuspid valve, and pumps it into the aorta via the aortic semilunar valve
Left Ventricle
True or False the left ventricle is thicker than right ventricle.
True or False The Coronary circulation is the functional blood supply to the heart muscle.
True
True
Receives deoxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary arteries via the pulmonary semilunar valve and pulmonary trunk
Right Ventricle
What is the name we give to the tricuspid and bicuspid which prevents the backflow of the blood into the atria during contraction of the ventricles?
Atrioventricular valves
Papillary muscles contract to tighten the chordae tendineae, which in turn prevent _____________
The chordae tendineae prevents the flaps from being _______________ into the right atrium.
Inversion
Everted
What are the major vessels conveying blood away from the heart?
Pulmonary trunk and ascending aorta.
What receives oxygen poor blood and then pumps this blood to the lungs to pick up oxygen and dispel carbon dioxide?
What receives the oxygenated blood from the lungs and pumps this blood throughout the body?
Pulmonary Circuit
Systemic Circuit
The average heart pumps ________ gallons of blood per day
2000
True or False the heart valves ensure unidirectional venous blood flow through the heart.
True or False heart valves open/close in response to differences in blood pressure on each side of the valves.
False. It is unidirectional flow but not specifically Venous.
True
("Around the heart"): a triple layered sac; fibrous and serous.
Formed from two layers:
- parietal layer: fused to fibrous pericardium
-visceral layer (aka epicardium)
Outer strong layer of dense connective tissue
Pericardium
Serous pericardium
Fibrous pericardium
True or False the right side of the heart is for oxygen poor blood and the left side of the heart is for oxygen rich blood?
True or False the left side of the heart is the pulmonary circuit and the right side is the systemic circuit?
True
False. The right side of the heart pumps blood into the pulmonary circuit. The left side of the heart pumps blood into the systemic circuit
In preparation for your lab exam. Starting at the pulmonary trunk gives the next five places the blood will flow going backwards.
NOTE: THIS IS GOING BACKWARDS
Pulmonary Trunk → Pulmonary Semilunar Valve → Right Ventricle → Tricuspid Valve → Right Atrium → Superior Vena Cava
______ ensures blood delivery to heart even if major vessels are occluded (blocked).
Each heart valve consists of two or three; flaps of endocardium reinforced by cores of dense C.T. called?
Collateral Routes
Cusps
What are the (x 2) superior chambers, separated by the interatrial septum, that receive blood returning from the pulmonary systemic circuits?
Atria
_______ prevent backflow from the great arteries into the ventricles.
What is the fluid-filled space between the parietal and visceral layers of serous pericardium and what is its function?
Semilunar valves (pulmonary and aortic valves)
Pericardial Cavity
Function: contains a lubricating fluid that reduces friction between the beating heart and the outer wall of the pericardial sac.
________ receives oxygenated blood returning from the lungs via the pulmonary veins, and pumps it into the left ventricle
Left atrium
What is the flow of the heart?
Superior Vena Cava → Right Atrium → Tricuspid Valve → Right Ventricle → Pulmonary Semilunar Valve → Pulmonary Trunk → Pulmonary Arteries → Lungs → Pulmonary Veins → Left Atrium → Bicuspid/Mitral Valve → Left Ventricle → Aortic Semilunar Valve → Ascending Aorta → Coronary Arteries → Walls of the Heart → Cardiac Veins → Coronary Sinus → Right Atrium