Iris
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The iris ( pl.: irides or irises) is a thin, annular structure in the eye in most mammals and birds, responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm. Eye color is defined by the iris. Etymology[edit]
Iris is a flowering plant genus of 310 accepted species [1] with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera.
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Iris sintenisii is a species in the genus Iris, in the subgenus Limniris and in series Spuriae, with tall thin stems, violet-blue flowers and long grass-like leaves. It is a rhizomatous perennial plant, from grass meadows (including steppe) parts of Europe, Russia, and Turkey. It is cultivated as an ornamental plant in temperate regions.
Jul 7, 2024 · The iris is the colored part of the eye that surrounds the pupil and controls the amount of light entering the eye. It is composed of muscular tissue and pigmentation, which gives it its distinctive color. The iris color is determined by the amount and distribution of melanin, the same pigment responsible for skin color.
iris, in anatomy, the colored muscular part of the eye surrounding the pupil, the small black opening in the center. The iris is located in front of the lens and behind the cornea. It is bathed in front and behind by a fluid known as the aqueous humor.
Aug 8, 2022 · The iris is a circular, colored structure that sits in front of the lens within the coronal plane towards the front of the eye.
Jun 5, 2024 · iris, (genus Iris ), genus of about 300 species of flowering plants, including some of the world’s most popular and varied garden flowers. The diversity of the genus is centerd in the north temperate zone, though some of its most handsome species are native to the Mediterranean and central Asian areas.
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The tall, beautiful iris flower, named after the Greek goddess who rode rainbows, comes in many magical colors. Despite its divine origins, this beautiful flower is rugged, reliable, and easy to grow. Learn to plant and care for irises for long-term success in your gardens.
