lab 4 blood Flashcards
True capillaries are only large enough to permit the passage of ___ at a time and sometimes the ___ can be seen in the capillaries lined up in single file.
one erythrocyte
erythrocyte
small arteries can be defined as having up to ____ layers of ___ muscle in the wall
8
smooth
Arterioles, the ___of the small arteries, have about ___ layers of smooth muscle cells in their wall.
smallest
1-2
The vein will have a few ____supporting its wall, whereas the artery will have a few ____ around it.
collagenous fibers
smooth muscle cells
Three layers of a medium sized artery or vein
tunica intima tunica media tunica adventitia (externa)
an endothelial lining is what layer of an artery
tunica intima
The ___ of an artery tends to be the thickest and most well-defined layer.
tunica media
In a vein the ___ tends to be the widest.
tunica externa (adventitia)
Medium arteries tend to have an internal ___.
elastic membranes
to see elastic tissue, ___ is used
stained by the Weigert’s elastic tissue method and counterstained with hematoxylin
in the large artery: the tunica ___ is well developed and possesses numerous concentrically arranged elastic fibers in the aorta.
media
The tunica ____, however, is relatively undeveloped and non-muscular in the aorta.
externa, adventitia
a nerve is
a bundle of axons in the peripheral nervous system.
Masson’s trichrome stain is used to stain
myelinated nerves
Masson’s trichrome stain was used to prepare this slide. Accordingly, collagenous fibers will appear ____ and smooth muscle will be ___
blue-green
red
fascicles is ___
a bundle of myelinated axons.
the dense connective tissue that wraps a fascicle of nerves is ___
perineurium
the connective tissue that extend inward from the perineurium to surround individual myelinated axons is ___
endoneurium
the outermost wrapping of a nerve___
and is what tissue type ___
epineurium
dense connective tissue
the epineurium extends into the interior of the nerve as a fibrous network, the ____, surrounding the fascicles.
interfascicular connective tissue,
Myelinated axons are ___ in H&E preparations.
blue
how do unmyelinated nerves differ from myelinated fibers?
not surrounded by myelin??
neurovascular bundle
consists of the binding of blood vessels and nerves with connective tissue
This structural conformation favors their migration in tandem throughout the body.
