A&P 2 L3 Flashcards
Approximately how big is the heart
The size of your fist
What is the main function of the cardiovascular system?
Get oxygen to the cell level
Opening between the atrium & ventricle
Atrioventricular orrifices
Tip of the bottom of the heart
Apex
Separates heart into the right & left sides; keeps blood from mixing; a complete separation from oxygen rich & oxygen poor blood
Septum
What does a hole in the septum result in
Mixing of the O2 rich blood & O2 poor blood
What are the 2 major valves within the chambers in the heart
Tricuspid valve & bicuspid valve
Opens & closes to allow blood into right atrium & right ventricle; regulates blood flow
Tricuspid valve
Opens & closes to allow blood flow from left atrium & left ventricle; regulates the passage of blood
Bicuspid valve
What are all the valves controlled by that makes it opens & closes
Pressure changes
What carries the blood to the heart
Veins
What carries blood Away from the heart
Arteries
On what side is oxygen poor blood; low pressure; blood returns to heart after cells
Right side
On what side is oxygen rich blood; high pressure
Left side
Why are the ventricles 3xs bigger than atriums
Because their walls are thicker
Where is the heart located
Bordered laterally by the lungs; lays slightly left of thoracic cavity (left lung)
What are the 5 major groups of high animals
Fish; reptiles; amphibians; birds; mammals
Groove between ventricles; runs on top of septum
Interventricular sulcus
Groove between each atrium & the associated ventricle
Atrioventricular sulcus
Bring blood from head to the heart
Superior vena cava
Bring blood from feet to heart
Inferior vena cava
Located in the heart itself; feeds heart; stores its used blood
Coronary sinus
Extensions from the papillary muscles to the tricuspid valve to help them open & close
Chordae tendenae
Smooth muscles that forms extensions
Papillary muscles
Base of the pulmonary trunk; looks like 2 half moons; regulate blood flow between right ventricle & pulmonary trunk
Pulmonary semilunar valve
Carries deoxygenated blood to 2 arteries into the left & right lungs
Pulmonary trunk
Sends blood from lungs to heart; carries oxygenated rich blood
Pulmonary veins
How many pulmonary veins are there in the left atrium
4
Pulmonary trunk is blue because it carries
deoxygenated poor blood
Pulmonary veins are red because it carries
Oxygenated rich blood
Rich blood is also known as
Oxygenated blood
Poor blood is also known as
Deoxygenated blood
What valve is at the base of the aorta; between left ventricle & aorta
Aortic valve
Thickest artery in the heart; expandable; sends O2 rich blood to all parts of the body
Aorta
What pumps blood
Chambers (atriums & ventricles)
What can receive blood
Vessels & chambers
What muscle pumps blood
Cardiac blood
Regulates the blood through the passageways only; cannot pump blood
Valves
How are anastomoses formed
Exercise
Extensions of a coronary artery; that is an alternative pathways for blood
Anastomoses
What is the pathway of blood
RA- superior & inferior vena cava; coronary sinus Tricuspid Valve RV Pulmonary semilunar valve Pulmonary trunk (O2 poor) Left/right lung "4" pulmonary veins (O2 rich) LA Bicuspid Valve LV Aortic semilunar valve Aorta Body
What is the pathway of the coronary circuit
Coronary arteries (Gives heart O2 rich/nutrients) Coronary Veins (O2 poor blood) Coronary Sinus (empties in RA)
What are the 2 major circulatory pathways
Pulmonary circuit & systemic
What is the pathways of the pulmonary circuit
RV (heart)
Lungs
LA (heart)
What is the pathway of the systemic circuit
LV (heart)
Body
RA (heart)
Inflammation in pericardial cavity
Pericarditis
Inflammation of endocardium
Endocarditis
Valves turning inward
Valvular prolapse
Change in shape of valve cusps
Valvular stenosis
Different sound; not seated properly; blood flow wrong way
Heart murmur
Partial blockage in coronary arteries
Angina pectoris
Weak heart
Congestive heart failure
When heart stops its called
Cardiac arrest
Blood clot in coronary arteries
Coronary thrombosis
What is the technical term for heart attack
Myocardial infarction
Dead; dying tissue
Infarct
Low blood oxygen
Ischemia