Collarette
The sinuous, scalloped line in the iris that divides the central pupillary zone from the peripheral ciliary zone and marks the embryonic site of the atrophied minor vascular circle of the iris.
Synonym: iris frill.
Dictionary > Collarette
You will also like...
A Balanced Vitamin Diet – Vitamins A – K
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Plant Cell Defense
Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..
Control of Body Movement
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
Photosynthesis – Photolysis and Carbon Fixation
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..
Stems
Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..
Gene Regulation in Eukaryotes
Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....