How can we help?

You can also find more resources in our Help Center.

49 terms

Module I: Basic Sciences-Cardiovascular System

STUDY
PLAY
Baroreceptors
receptors in aortic arch, carotid sinus and ventricles which respond to changes in blood pressure. (part of parasympathetic nervous system)
Myocardium
cardiac muscle
automaticity
ability to contract on its own without stimulation
Atria
superior chambers of heart
ventricles
inferior chambers of heart
Superior Vena Cava
receives blood from above heart
Inferior Vena Cava
received blood from below heart
Coronary Sinus
blood from veins of heart muscle
Arteries
vessels leading away from heart
Veins
vessels leading toward the heart
Pulmonary Artery
Caries O2 depleted blood to lungs
Pulmonary Veins
Caries O2 saturated blood to left atrium
Mitral Valve
valve between left atria and ventricle
Aorta
Caries O2 saturated blood to body
Heart Murmur
back flow or turbulence of blood in heart
Ischemia
weakened heart cells from lack of O2
Angina pectoris
chest pain
Myocardial Infarction
heart attack or death of heart tissue
Arterioles
small arteries
Capillaries
microscopic vessels where O2 & CO2 exchange
Venules
small veins
Vasoconstriction
decrease in size of vessel
Vasodilation
increase in size of vessel
Diastolic phase
blood pressure when ventricles are relaxed
Systolic Phase
blood pressure when ventricles are constracting
Cardiac Cycle
1 alternate contraction and relaxation followed by short pause
Bradychardia
Heart rate below 60 beats per minute
Tachycardia
Heart rate above 60 beats per minute
Cardioacceleratory Center
Neurons in medulla of brain which travel to SA node of heart, release norepinephrine to increase heart rate and strength of contractions
Cardioinhibitory Center
Neurons in medulla of brain which heart via vagus nerve, release acetylcholine which decreases heart rate and force of contraction
SA Node
Pacemaker of heart (in right atria)
AV Node
Between atria and ventricle
Bundle of His
fibers in right and left ventricles which stimulate contraction
Purkinje Fibers
system of fibers which spreads impulse among ventricular muscle fibers
Stroke Volume
Amount of blood pumped by left ventricle in each beat (60mL of blood = 2oz)
Cardiac Output
Blood pumped out of left ventricle in 1 minute (Stroke Volume x Heart Rate = Cardiac Output)
Hyoxia
lack of oxygen
P wave
Atrial depolarization=atrial contraction
QRS wave
Ventricular contraction
T wave
ventricular repolarization=ventricle relaxation
Dysrhythmias
abnormal heart rhythms
Lingual Artery
supplies tongue, floor of mouth
Facial Artery
inferior border of mandible, across face
Maxillary Artery
Supply for face
Inferior Alveolar Artery
supplies mandible and teeth
Pterygoid Plexus
drains from cranial cavity, jaws, sinuses and muscles of mastication
Hematoma
clotted or partially clotted blood outside a vessel
Antecubital Space
anterior surface of elbow
Phlebitis
inflammation of the vein