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A&P 2 Cardiovascular System
Terms in this set (40)
What is the left semi lunar valve?
Blood flows from the right ventricle to which major vessels?
The pulmonary valve prevents backflow of blood into which structure?
The right ventricle
What is the inner surface of the myocardium?
What separates the right and left ventricles?
Where are the purkinje fibers located?
In the myocardium if the ventricles
What causes the first heart sound?
The 2 AV valves closing
Where does blood travel after it exits the aorta?
To the tissues of the body, delivering O2 rich blood
What does the aorta become after descending caudally to the diaphragm?
The descending aorta, delivering O2 rich blood to the lower body parts
What is an EKG useful for?
The tricuspid valve prevents backflow of blood into where?
The rift atrium
What happens to the heart rate during hypovolemic shock?
It increase in order to compensate for decreased pressure
Where does the heart receive it's own blood supply from?
The coronary arteries
What occurs when electrical impulse reaches the atria?
The SV valves close
What is a bypass for the fetal liver?
What % of animals body weight is blood?
The fibers that infiltrate into the ventricular myocardium are called?
What are coronary veins?
Empty blood via the coronary sinus into the right atrium
What is systole?
Contraction or depolarization of the atria and ventricles
Which chamber receives O2 rich blood?
The left atrium via the pulmonary veins
What is the difference between systolic and diastolic pressure called?
The sympathetic nervous system will cause vasoconstriction, and therefore cause?
And increased blood pressure
Pulmonary circulation is under what type of pressure?
Low (compared to systemic)
The coronary veins empty blood into which heart chamber?
The right atrium (always receives O2 poor blood)
What vessel brings fresh O2 rich blood from the placenta to a developing fetus?
Blood will enter the heart from the pulmonary veins in the?
What blood pressure value is most important?
During ventricular systole, where is the highest pressure existing in the heart?
In the ventricles while contracting (systole)
What is cardiac output?
The volume of blood ejected from the left ventricle in one minute (ml/min)
What does the placenta function as for a fetus?
Liver and lungs
What is Ductus Arteriosus?
Bypass for fetal lungs, constricts after birth allowing blood flow to lungs
What is ductus venosus?
Bypass for fetal liver, constricts after birth allowing blood flow to the liver
What is foramen ovale?
An oval opening between the atria, closes during first breath after birth to prevent shunting of blood between the atria
Patent ductuous arteriousus in infants, Valve doesn't close
Hepatic portal system?
Takes blood from the digestive tract to the liver, allowing the products of digestion to be processed immediately
2 liver blood supplies are?
Hepatic artery and hepatic vein
What is the P wave?
Atrial depolarization (systole)
What is the T wave?
Ventricular repolarization (diastole)
QRS complex is?
Ventricular depolarization (systole)
What are the smallest vessels?
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