A&P 2 Lab quiz 4- Boyd
What are the three main veins in the heart?
- superior vena cava - inferior vena cava - coronary sinus
What does the left coronary artery split into?
-Left anterior descending artery (AKA widow maker) -Circumflex artery
What does placing a stent in the heart do?
-widen the blood vessels so more blood can flow
Describe the pathway of blood through the heart
Blood enters the right atrium from the superior and inferior vena cava, and the coronary sinus. From right atrium, it goes through the tricuspid valve to the right ventricle. From the right ventricle, it goes through the pulmonary valve to the pulmonary trunk. From the pulmonary trunk it moves into the right and left pulmonary arteries to the lungs. From the lungs, oxygenated blood is returned to the heart through the right and left pulmonary veins. From the pulmonary veins, blood flows into the left atrium. From the left atrium, blood flows through the bicuspid (mitral) valve into the left ventricle. From the left ventricle, it goes through the aortic valve into the aorta. Blood is distributed to the rest of the body from the aorta.
What does the superior vena cava do?
Brings deoxygenated blood from places above the heart
What does the inferior vena cave do?
Brings deoxygenated blood from places below the heart
What is the endocardium made of?
Epithelium tissue
What is the parietal pericardium layer?
Lines the cavity that the heart lies in
Are the Atria chambers inferior or superior?
Superior
Where is the heart located in the body?
Ventral cavity--> Thoracic cavity-->Pericardial cavity
What do the left and right auricle do?
allow more blood to enter atrium
Where is the apex of the heart?
bottom of the heart
What does the coronary sinus do?
brings deoxygenated blood from the heart itself
What is the myocardium made of?
cardiac muscle
What do veins do?
carry blood to the heart
What is bypass surgery?
creating a new path for blood to flow to heart tissue using healthy vessels from other parts of the body
Right side of the heart deals with____?
deoxygenated blood (dark red)
What are the layers of the heart wall?
epicardium (outermost), myocardium(middle), endocardium(innermost)
Are the ventricle chamber inferior or superior?
inferior
What is the visceral pericardium layer?
layer that lays directly on the heart
Left side of the heart deals with__?
oxygenated blood (bright red color)
What do heart valves do?
prevent backflow of blood
What are the four chambers of the heart?
right atrium, right ventricle, left atrium, left ventricle
What is between the visceral and parietal pericardium layers?
serous fluid, which prevents friction
What is the pericardium?
serous membrane that surrounds the heart
What do arteries do?
take blood away from the heart
Where is the base of the heart?
top of the heart
What are the 4 valves of the heart?
tricuspid, bicuspid(mitral), pulmonary, aortic
What is the epicardium made of?
visceral pericardium
Describe the characteristics of cardiac muscle
visible striations, involuntary, uninucleate, shorter branched cells, found only in the heart, joined at intercalated discs that run perpendicular to the striations
