National Cancer Institute
U.S. National Institutes of Health | www.cancer.gov
In English | En español
NCI Home
Cancer Topics
Clinical Trials
Cancer Statistics
Research & Funding
News
About NCI
Dictionary of Cancer Terms
In English   En español
Page Options
Print This Page
More NCI Dictionaries
NCI Drug Dictionary

Glossary of Statistical Terms

NCI Dictionary of Genetics Terms

Terminology Resources
Quit Smoking Today
Search for
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
In English   En español

choroid (KOR-oid)

 A thin layer of tissue that is part of the middle layer of the wall of the eye, between the sclera (white outer layer of the eye) and the retina (the inner layer of nerve tissue at the back of the eye). The choriod is filled with blood vessels that bring oxygen and nutrients to the eye.

Enlarge
Eye anatomy; two-panel drawing shows the outside and inside of the eye. The top panel shows outside of the eye including the eyelid, pupil, sclera, and iris; the bottom panel shows inside of the eye including the cornea, lens, ciliary body, retina, choroid, optic nerve, and vitreous humor.




Previous Definitions:chorioallantoic membrane, chorioblastoma, choriocarcinoma, chorioepithelioma, chorionic carcinoma
Next Definitions:choroid plexus tumor, CHPP, chromaffin cell, chromosome, chronic

A Service of the National Cancer Institute
Department of Health and Human Services National Institutes of Health USA.gov