Week Three: Have A Heart Flashcards
What does cardiovascular mean?
Pertaining to the heart and blood vessels
What is the purpose of the cardiovascular system?
Delivers oxygen, nutrients, and hormones to various tissues of the body
Transports waste products to the appropriate waste removal system
Also called circulatory system
What is the heart?
A hollow, muscular organ that provides the power to move blood through the body
The heart is located in the…
Mediastinum
What is the pericardium?
Double walled membrane surrounding the heart
Made of fibrous and serous layers
What is the fibrous layer of the pericardium?
Tougher, protective layer
What is the parietal layer of the serous layer of the pericardium?
Outside
What is the visceral layer of the serous layer of the pericardium?
Touches the organ
What is the pericardial space?
Space between the two serous layers of the pericardium
Contains pericardial fluid
What is pericardial fluid?
Prevents friction between the heart and pericardium when the heart beats
What are the three layers of the heart?
Epicardium, myocardium, endocardium
What is the epicardium
External layer of heart
What is the myocardium
Middle layer of heart
What is the endocardium
Inner layer of heart
What are coronary vessels
Blood vessels that deliver blood to and take blood away from hearts tissues
What is a coronary occlusion
Blockage of coronary vessels and can lead to ischemia
What is ischemia
Deficiency in blood supply to an area
May lead to necrosis
An area of necrosis caused by ischemia is called..
Infarct
What is atria
Superior chambers if heart
Combing form for atria
Atri/o
What are ventricles
Inferior chambers of the heart
Combining form for ventricles
Ventricul/o
What is a septum
Separating wall
What does the atrioventricular septum separate
Right and left chambers of the heart
What is the apex
Tip of heart (pointing part)
What is a valve?
Membranous fold
Heart valves control…
Flow of blood through heart
Combining form for valve
Valv/o and valvul/o
Right AV valve is also called..
Right atrioventricular valve
Tricuspid valve
Left AV valve is also called
Left atrioventricular valve
Bicuspid valve
Mitral valve
What is heartbeat
Rate and regularity of heart rhythm
What influences heartbeat
Electrical impulses from nerves in the myocardium
What is cardiac output
Volume of blood pumped by the heart over time
Where is the sinoatrial node (SA node) located
In the right atrial wall
What does the SA node do?
Initiates hart rhythm
Where is the atrioventricular node (AV node) located
In the Interatrial septum
What does the AV node do?
Receives impulse from SA node and sends impulses to the bundle of His
Where is the bundle of his located?
In the inter ventricular septum and continues through ventricles as the Purkinje fibers
What do Purkinje fibers do?
Carry impulses through ventricular muscle causing them to contract
What is systole?
Contraction
What is asystole?
Without contraction, heart is not beating
What do arrhythmia and dysrhythmia mean?
Abnormal heart rhythm
What is bradycardia
Abnormally slow heartbeat
What is tachycardia
Abnormally fast heartbeat
What is an electrocardiography?
Process of recording electrical activity of heart
What is an electrocardiogram?
Record of electrical activity of myocardium
What is the P wave
First wave/signal
Depolarization of the atria
What is QRS complex
Spike part on an ECG
Depolarization of ventricles
What is T wave
Repolarization
What is auscultation
Listening to body sounds with a stethoscope
What is the “lub”
Closing of atrioventricular valves
What is the “dub”
Closing of the semilunar valves
What is a murmur
Abnormal sound associated with turbulent blood flor
What are blood vessels
Tubes which blood flows through
What are the combining form for vessels
Angi/o and vas/o
What are the three major types of blood vessels
Arteries, capillaries, and veins
What is lumen
Opening in blood vessels which blood flows
Opening of any tube
What is constriction
Narrowing of the lumen
What is dilation
Widening of lumen
What are arteries
Blood vessels that carry blood away from heart
Usually oxygenated but not always
What is the combining form for artery
Ateri/o
What are arterioles
Smaller branches of arteries
What are veins
Blood vessels that carry blood toward the heart
Usually deoxygenated but not always
What are the combining forms for veins
Ven/o and pleb/o
What are capillaries
Single cell thick and interface between arteries and veins
What is blood pressure
Tension exerted by blood on the arterial walls
What is the combining form for blood pressure
Tensi/o
What is blood pressure measured by
Sphygmomanometer
What is a tourniquet (know how to spell this)
Stops blood flow
What is cardiomegaly
Heart enlargement
What is cardiomyopathy
Disease of heart muscle
What is CHF
Congestive heart failure
What is dirofilariosis
Heartworm infection
What is embolus
Foreign thing somewhere
What is embolism
Condition if having foreign thing somewhere
What is hematoma
Blood tumor or collection of blood
What is occlusion
Blockage
What is shock
Oxygen not getting to tissues
What is thrombus
Clot
What is thrombosis
Condition of having clot
What is defibrillation
Use of electric shock to correct heart
What is hemostasis
Stopping of blood flow
What is transfusion
Blood or blood products from someone else
What is PDA
Patent ductus arteriosus
Open hole between heart