eyelid

A movable or semi-movable ocular covering that protects the eye and contributes to surface maintenance; structure and composition vary widely among vertebrate species. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the eyelid is

A movable or semi-movable ocular covering that protects the eye and contributes to surface maintenance; structure and composition vary widely among vertebrate species. The atlas records it as a organ at the organ scale in the human body.

Where the eyelid is

It sits in the head, within the sensory system. Positioned deliberately as part of this species body plan.

What the eyelid connects to

The atlas records 19 typed relationships for it, across 8 kinds of connection. part of camera-type eye.

Supply and innervation

Venous drainage: palpebral vein.

Also called

Also recorded as blepharon, eye lid, palpebra, blephara and palpebrae. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001711, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: camera-type eye.
• A kind of: organ part.
• Attaches to: eyelash.
• Adjacent to: conjunctiva and palpebral conjunctiva.
• contains: eyelid subcutaneous connective tissue, eyelid tarsus, gland of Zeis, levator palpebrae superioris, margin of eyelid and palpebral conjunctiva, and 3 more.
• contributes to morphology of: camera-type eye and tarsal gland.
• subtype: lower eyelid and upper eyelid.
• Drained by: palpebral vein.

Questions

Where is the eyelid?

It sits in the head, within the sensory system. Positioned deliberately as part of this species body plan.

What does the eyelid connect to?

Part of: camera-type eye.

Is the eyelid the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.