The correct spelling of the term "plexus chorioideus" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first word "plexus" is pronounced /ˈplɛksəs/, with the "x" being the voiceless velar fricative sound. The second word "chorioideus" is pronounced /ˌkɒrɪɔɪˈdiːəs/, with the "ch" being the voiceless palato-alveolar affricate sound and the "ei" being a diphthong pronounced as /ɔɪ/. Overall, the spelling of this term follows the conventions of Latin origin words in medical terminology.
The term "plexus chorioideus" refers to a network of blood vessels found within the ventricles of the brain. It consists of an intricate arrangement of delicate, branching blood vessels enveloped by specialized epithelial cells called choroid plexus epithelium. The plexus chorioideus is primarily responsible for the production and circulation of cerebrospinal fluid (CSF), a clear fluid that acts as a cushion for the brain and spinal cord, and plays a vital role in the exchange of nutrients and waste products between the blood and the nervous system.
The plexus chorioideus is situated within the ventricles of the brain, specifically in the lateral, third, and fourth ventricles. These ventricles are interconnected cavities filled with CSF, and the plexus chorioideus is located on the inner surface of each ventricle. The choroid plexus epithelium in these areas actively secretes CSF, which is then propelled through the ventricular system, bathing and protecting the brain and spinal cord.
Due to its rich blood supply, the plexus chorioideus is highly vascularized and receives nourishment from the surrounding blood vessels within the brain. The choroid plexus epithelial cells selectively transport specific molecules from the blood, while also actively removing potentially harmful substances.
In summary, the plexus chorioideus is an intricate network of blood vessels accompanied by specialized epithelial cells that produce and circulate cerebrospinal fluid within the ventricles of the brain.
Chorioid plexus, a vascular proliferation or fringe of the fold of pia mater, tela chorioidea, in one of the cerebral ventricles; by secretion or absorption of cerebrospinal fluid the chorioid plexus serves to regulate the intra ventricular pressure.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term "plexus chorioideus" is derived from Latin.
1. "Plexus" comes from the Latin word "plexus", which means "a network" or "a braiding". It refers to a mesh-like arrangement or interconnection of blood vessels or nerve fibers.
2. "Chorioideus" is derived from the Latin word "chorioideus" or "chorioide", which is a combination of "chorion" (meaning "membrane") and "oideus" (meaning "resembling" or "like"). "Chorion" refers to the outermost fetal membrane surrounding the embryo in the uterus.
Therefore, "plexus chorioideus" literally means "network of blood vessels resembling the chorion" or "mesh-like arrangement of blood vessels like the chorion".