Cardiovascular Histology Flashcards
The endocardium is continuous with what tunic of a vessel?
tunica intima
What is the function of Purkinje cells?
They carry impulses to ordinary cardiomyocytes.
What layer of the cardiac tunic consists of cardiac muscle cells?
THe myocardium.
What type of epithelium comprises the epicardium?
simple squamous epithelium.
What is the cardiac skeleton?
Dense, collagenouc connective tissue.
Myocardial fibers originate and insert into it.
What are the components of the tunica intima?
endothelium
basal lamina
subendothelial connective tissue and internal elastic membrane.
In the tunica intima, what component of the vessel is incomplete in elastic arteries but thick and complete in muscular arteries?
internal elastic membrane.
What type of muscle is found in the tunica media?
smooth muscle and fibroblasts.
What is the outermost layer of the tunics?
The tunica adventitia. It lacks arterioles, but consists of loose areolar tissue.
As an artery’s diameter increases, pressure _______
increases.
What is a feature of elastic arteries?
They stretch during systole and recoil during diastole.
What type of cells are found adjacent to capillaries?
Continuous capillaries.
Where can continuous capillaries be found?
The lung
What is the innermost layer of a vessel?
Endocardium.
How are veins different than arteries?
They have a larger lumen, thinner wall and valves are present in many veins.
