Cardiovascular System Flashcards
Cardiovascular diseases
Disease of the heart + blood vessels
Example of things that lead to cardiovascular diseases
Age
Sex
Obesity
Smoking
Family history
High blood pressure
Diabetes
High cholesterol
Types of cardiovascular diseases
Coronary artery disease
Heart failure
Stroke
Chronic kidney disease
Two phases of a heart beat
Systole (pumping)
Diastole (relax)
What is cardiac output
Amount of blood pumped out the heart per minute
Cardiac out equation
CO = HR x SV
What I’d blood pressure
The force of blood pushing against artery walls
Systemic vascular resistance
Resistance in circulatory system used to make blood pressure
When blood vessels constrict. What happens to SVR
Systemic vascular resistance increase
When blood vessels dilate. What happens to SVR
Systemic vascular resistance decrease
How is blood pressure maintained
Using a sphygmomanometer
What two readings does a sphygmomanometer show
Systolic BP
diastolic BP
What is systolic blood pressure
When heart contracts and highest pressure
Diastolic blood pressure
When heart relaxes and lowest pressure
Average systolic BP
120mmHg
Average diastolic BO
80mmHg
What organs control pressure
Kidneys
Heart
Brain.
Arteries
How do kidneys control blood pressure
(RAAS)
Renin. Angiotensin aldosterone system
What happens to blood in the kidneys
filtered to remove water + toxins
What is the nephron made up of
The glomerulus
Bowman’s capsule
Renal tubule