The functional unit of the choroid plexus, composed of a capillary enveloped by a layer of differentiated ependymal epithelium, is shown in Figure 32-6. Unlike the capillaries that form the blood—brain barrier, choroid plexus capillaries are fenestrated and have no tight junctions.
- 1 What is the choroid plexus composed of?
- 2 Are choroid plexus capillaries?
- 3 What is the name of the specialized capillaries that secrete cerebrospinal fluid?
- 4 Is the choroid plexus in the thalamus?
- 5 Do all ventricles contain choroid plexus?
- 6 Is there choroid plexus in the 4th ventricle?
- 7 Does third ventricle have choroid plexus?
What is the choroid plexus composed of?
cuboidal epithelial cells
Choroid plexus is composed of cuboidal epithelial cells resting on a basal lamina which are adjacent to highly fenestrated blood vessels separated by the stroma. The tight junctions located between the apical parts of the choroid plexus epithelial cells form the blood–cerebrospinal fluid barrier (Kaur et al., 2016).
Are choroid plexus capillaries?
The choroid plexus is a complex network of capillaries lined by specialized cells and has various functions. One of the primary functions is to produce cerebrospinal fluid (CSF) via the ependymal cells that line the ventricles of the brain.
What is the name of the specialized capillaries that secrete cerebrospinal fluid?
The choroid plexus is a network of capillaries and specialized ependymal cells found in the cerebral ventricles of the brain. The choroid plexus serves two roles for the body: it produces cerebrospinal fluid and provides a toxin barrier to the brain and other central nervous system tissue.
Is the choroid plexus in the thalamus?
…it is secreted by the choroid plexus, a collection of blood vessels in the walls of the lateral ventricles. The fluid drains via interventricular foramina, or openings, into a slitlike third ventricle, which, situated along the midline of the brain, separates the symmetrical halves of the thalamus and hypothalamus.
Do all ventricles contain choroid plexus?
The cells form a single layer of cuboidal epithelium, the slight apical bulge of which resembles a set of cobblestones. Choroid plexus cells are found in all of the ventricles.
Is there choroid plexus in the 4th ventricle?
The choroid plexus of the fourth ventricle consists of two symmetrical parts located in the roof of the ventricle and protruding through its openings, the foramina of Luschka and Magendie.
Does third ventricle have choroid plexus?
In the third ventricle there is a small amount in the roof that is continuous with that in the body, via the interventricular foramina, the channels that connect the lateral ventricles with the third ventricle. A choroid plexus is in part of the roof of the fourth ventricle.