Module 4 Flashcards
Pulmonary circulation (48 cards)
What is the function of the right Atrium and right ventricle
To pump and propel oxygenated blood to the lungs
What is the function of the left a atrium and ventrical?
To pump and propel oxygenated blood throughout the systemic circulation
What Divides the left from this right side of the heart ?
It’s separated by septum - inter
How much does the heart weigh?
200-250 gm
Where is the heart located?
Enclosed in the media steinem in between the 2nd and 5th intercostal space heart rests on the superior surface of the diaphragm anterior to the vertebral column and posterier to the sternum. Approx. Me 2/3 of the heart lies on the Left
What protects, anchors and prevents the heart from over filling?
Pericardium
, it lines the heart’s chambersA thick contractile middle layer of the heart, bulk of the heart characteristic cross striations of muscular tissue.
Myocardium
Inner myocardial surface, glistening white sheet of squamous epithelium that rests on a thin connective tissue. Located in the inner myocardial surface.
Endocardium
What are the layers of the heart, outer most to the inner most layers?
Fibrous Pericardium Parietal Layer of serous pericardium Pericardial cavity Visceral layer of serous pericardium (epicardium) Myocardium Endocardium
Left coronary artery
Supplies blood to the left LV and LA
Right coronary artery?
Supplies blood to RA and RV
What happens when blood flow to the heart muscle is not sufficient enough for the demand?
Heart attack
What are mammary arteries used for?
Replacement vessels for the heart during a heart attack.
What cautions should be taken if mammary arteries are used for a cabg?
Must be careful with by not using too much peep. May rip sutures
Where does the anterior side of the heart empty to?
Anterior side of heart empties into the great cardiac veins
Where does the Posterior side of the heart empty to?
Empties to the middle cardiac veins
- Both cardiac veins converge and empty into
coronary sinus
- Some collected into thebesian veins (RA and LA)
- Contributes to anatomical shunt.
What is the vascular system divided into?
Pulmonary vascular system
Systemic vascular system
Pulmonary Vascular System
Low pressure system diastolic 8
External respiration
What is external respiration
In the lungs, exchange between air and blood
Systemic vascular system
High pressure system diastolic 80
Internal respiration
What is Internal respiration
gas exchange between tissues and blood
Where does gas exchange take place
in the capillaries
What is Systolic pressure
Maximum pressure generated during ventricular contraction
What is sytemic systolic pressure
120 mmhg
