Flashcards in The Heart & Vascular Anatomy Deck (30):
What are the three functions of the fibrous pericardium?
Prevent heart from overfilling
What is the function of the serous pericardium?
Allows the heart to work and a relatively friction free environment
The structure of the heart can be broken into what three main tissue types?
Myocardium (contractile tissue)
Systemic and pulmonary circulation are associated with which side of the heart?
Right heart = pulmonary
Left heart = Systemic
How many valves are there in the heart and where are they located?
Tricuspid = R av
Mitral = L av
Pulmonic = RV @ pulm. art
Aortic = LV @ aorta
Describe the flow of blood through the heart
RA -> (tricuspid) -> RV ->(pulmonic) -> pulm arteries -> Lungs -> pulm veins -> LA -> (mitral) -> LV -> (aortic) -> aorta -> systemic circ
The foramen ovale and ductus arteriosis form shunts between what structures in the fetal circulation?
FO = RA + LA
DA = pulm art + aorta
FO and DA blood flow bypasses what in fetal circulation?
Describe the conduction system in the heart
SA -> AV -> bundle of his -> AV bundles -> purkinje fibers
What is automaticity?
Intrinsic pacemaker SA node
Where does the heart receive its parasympathetic innervation?
Where does the heart receive its sympathetic innervation?
Cardiac plexus of T1 - T5
Blood plasma is composed of what percentage water?
What is the difference between CBC, BMP and differential?
CBC: Complete blood count
BMP: Basic metabolic panel
Differential: Detailed WBC
What is the lifespan of an erythrocyte?
RBC = 120 days
What is diapedesis?
White blood cells can leave capillaries and go into tissues via an inflammatory pathway
Leukocytes can be divided into what two main groups?
Granulocytes and agranulocytes
What are the three types of granulocytes and what do they do?
Eosinophils = Phagocytize antigen antibody complexes
Basophils = Combat allergens by releasing histamine
Neutrophils = Antibiotic like proteins that cause bacteriolysis
What is the most common granulocyte?
What are the two different types of agranulocytes?
Lymphocytes = phagocytize tumor cells
monocytes = high in chronic infections
How do platelets cause vasoconstriction?
Plasma is what percent of total blood volume?
The vasculature can be divided into what three layers?
Which layer is thickest in veins?
Tunica externa = veins
Tunica media = arteries
What is the functional unit of CVS?
60% of total blood volume is stored where?
PVR is affected by....
What is the function Of the pulmonary capillaries?
Metabolism of biochemicals
Conversion of interactive to active biochemicals
Alpha and beta receptors are responsible for vasoconstriction vasodilation?
Alpha = Vasoconstriction
Beta = vasodilation