Flashcards in Circulatory Deck (61):
efferent side of circulatory system
afferent side of circulatory system
What is the most prominent coat of arteries?
in larger arteries the ... contains dozens of concentrically arranged, menstruated sheets of elastin, also referred to as laminae
In large arteries ... is a thin layer, compromised mostly of a network of collagen and elastic fibers with scattered fibroblasts and smooth muscle cells
In larger arteries ... is a layer of irregularly arranged CT. It is rich in collagen fibers and has a coarser texture.
nerves in the adventitia of larger arteries are called
small blood vessels in the adventitia of larger arteries are called
With aging there is a progressive decline of distensibility of the elastic arteries. This may be related to increased ...
cross-linking within the component of elastin
What are the prominent layers in muscular or distributing arteries?
media and adventitia
In contrast to large arteries the muscular arteries have a ... content of elastin and ... are not present in the media.
elastin is greatly reduced; fenestrated sheets are not present
the outer boundary of the media in muscular arteries is often made prominent by an ...., another condensation of elastic fibrils
esternal elastic membrane
the intima of muscular arteries is bound addict to the media by a prominent ..., which represents a condensation of fibrils of elastin
internal elastic membrane
What layer of muscular arteries has fenestrations; thin and lined with flattened endothelial cells
Atherosclerosis is characterized by the development of focal thickening (plaques) in the ...
plaque formation is initiated when ... collect at sites of endothelial injury
in plaque formation monocytes enter the intimate to differentiate into ... which proceed to scavenge and digest LDL
macrophages become laden with fat during plaque formation and become known as ...
small arteries are easily identifiable by their circular profile and prominent ... containing several layers of concentrically arranged SM, with various fibers intermingling
In small arteries the SM content may form up to ... layers
When the SM content is reduced to 1-2 layers, the vessel is classified as an .... There is no external elastic membrane
The intimate of small arteries consists of ..., opposed to a scalloped internal elastic membrane.
flattened endothelial cells
The adventitia of small arteries lacks ... but vasomotor nerves continue to associate with thoughts layers of the media
in comparison to the small artery/arteriole its companion venue shows a much larger ..., and little ...
larger lumen; little SM content
Presence of ... between endothelial cells and adjoining smooth muscle cells in arteries may serve as a conduction device that extend the influence of humoral factors circulated by the blood
in capillaries numerous ... may lie in close association to the basal lamina
reticular (type III colagen) fibers
continuous endothelium of capillaries, arteries and veins is only interrupted at ...
The cytoplasm of the continuous endothelial cells is characterized by numerous ... which provide for transcellular transport of large molecules and fluid between the plasma and tissue
The continuous endothelial cells of brain capillaries are joined by ..., no gaps are seen (blood-brain barrier)
A diaphramous structure containing ... that repel anionic proteins in plasma appears to "close" the window (fenestrations of endothelium of capillaries)
Relatively undifferentiated cells with long cytoplasmic processes that tend to encircle capillary endothelium; contractile function; capable of differentiating into endothelial cells and SM during growth and repair
When damaged, endothelium can participate in thrombosis formation by release of von Hillenbrand factor from ...
cytoplasmic Weibel-Palade granules
What is the thickest layer of small veins (venues)
adventitia - composed of collagen and elastic fibers
As venues increase in diameter, ... become more numerous, and SM cells being to appear
What is the thickest coat in medium veins?
adventitia - contains abundance of collagen fibers
The intima of medium veins lacks an
internal elastic membrane
... are present in medium veins, representing folds of intimate
Blood flow may be directed from capillary beds by passing directly from arterioles to venues through ...; prominent in skin; important in the regulation of heat loss a the body surface.
These structures represent atypical capillaries
What coat is the most prominent in the the collecting vessels of the lymphatic system?
What coat is the thickest in the lymph trucks (right lymphatic duct and thoracic duct)
Endocardium is thickest in the ... and thinnest in the ...
a surface layer of polygonal shaped cells, continuous with those of blood vascular system
moderately dense, irregular CT with fine collagen fibers superficially and many elastic fibers more deeply
a relatively looser plan of CT, which is predominantly collagen fibers and continuous with the endomysium of the underlying myocardium
Which layer of the walls of the heart receives innervations from both divisions of the ANS system?
The myocardium is much thinner in the ... than the ...
The myocardium in the right ventricle is much ... than that of the left ventricle
terminal branches of the ... pass from the endocardium into the myocardium and give rise to the profuse capillary system
Blood passes from the capillaries into the various cardiac veins, most of which terminate in the ... of the epicardium
Nerves from the sympathetic and parasympathetic division of the ANS form the ...
SA node is located in the ... layer at the junction of the superior vena cava and right atrium
The AV node and AV bundle lie in the ... of the membranous portions of the inter ventricular septum
Valves are covered on both sides by a layer of
valves contain a supporting layer termed the ..., consisting of collagenous tissue that connects with the fibrous rings (annuli fibrosi) surrounding each valve orifice
Fibrosa connects with the ... in the case of the AV valve
Valves also contain a layer of loose connective tissue termed the ...
sponges of valves is rich in ... and is ... in nature
Contributes to a valve's pliability and its ability to establish a seal during the cardiac cycle
the sponges of the MV develops an exaggerated amount of the ... leading the mitral valve prolapsed