Components of Cardiovascular System
The three components of Cardiovascular System
What are blood vessels, the heart, and blood?
Blood vessels bringing blood to heart
What are veins?
Period of ventricular contraction
What is the systole?
The type of regulatory mechanisms that control mean arterial pressure (MAP)
What are extrinsic regulatory mechanisms?
System that works with cardiovascular system that picks up the fluid that leaks out of the capillaries
What is the lymphatic system?
The four chambers of the heart
What are two upper chambers - atria - and two lower chambers - ventricles?
Term for arterioles, capillaries, and venules
What is microcirculation?
The structure in the heart where an action potential is initiated
What is the sinoatrial (SA) node?
Sensory receptors that respond to changes in pressure within cardiovascular system
What are arterial baroreceptors?
True or false. Hypotension is more dangerous than hypertension.
What is true?
Not exactly cells, but cell fragments in blood
What are platelets?
When blood vessel radius decreases
What is vasoconstriction?
Phase of cardiac cycle where blood exits ventricles
What is ventricular ejection?
Hormones released that increase MAP
What are epinephrine, vasopressin, angioensin II?
The two divisions of circulatory system
The site of exchange between blood and interstitial fluid
What are capillaries?
This type of blood vessels have the greatest blood flow resistance
What are arterioles?
Valves that are open in ventricular ejection
What are semilunar valves?
Receptors in the brain and carotid arteries that regulate carbon dioxide, oxygen, and hydrogen ions in arterial blood?
What are chemoreceptors?
Decrease of blood flow to brain that causes dizziness
What is orthostatic hypotension?
The structure that separates the left and right ventricles
What is interventricular septum?
Type of capillaries primarily found in kidneys, intestines, and endocrine glands
What are fenestrated capillaries?
Network of fibers that brings impulses from the ventricular myocardium upward to valves
What are Purkinje fibers?
Process that elevates low arterial pressure that increases sympathetic activity
What is baroreceptor reflex?
Another name for bicuspid valve
What is mitral valve?