iris in dogs

The adjustable membrane, composed of the stroma and pigmented epithelium, located just in front of the crystalline lens within the eye. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the iris is

The adjustable membrane, composed of the stroma and pigmented epithelium, located just in front of the crystalline lens within the eye. The atlas records it as a tissue at the tissue scale in the dog.

Where the iris is

It sits in the head, within the sensory system. Not positioned individually, and containment is not asserted either. Drawn near structures of the same kind, which is a weak claim about location.

What the iris connects to

The atlas records 22 typed relationships for it, across 8 kinds of connection. part of anterior uvea and uvea.

Supply and innervation

Innervation: iris nerve.

Also called

Also recorded as anterior uvea, irides and irises. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001769, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: anterior uvea and uvea.
• A kind of: anatomical structure.
• contains: iris blood vessel, iris epithelium, iris smooth muscle, iris stroma, muscle of iris and pupil, and 3 more.
• contributes to morphology of: anterior uvea, iris epithelium, iris stroma and pupil.
• inserts into: dilatator pupillae and sphincter pupillae.
• originates from: dilatator pupillae and sphincter pupillae.
• Develops from: optic vesicle.
• Innervated by: iris nerve.

Questions

Where is the iris?

It sits in the head, within the sensory system. Not positioned individually, and containment is not asserted either. Drawn near structures of the same kind, which is a weak claim about location.

What does the iris connect to?

Part of: anterior uvea and uvea.

Is the iris the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.