smooth muscle tissue

Muscle tissue which is unstriated, composed primarily of smooth muscle fibers surrounded by a reticulum of collagen and elastic fibers. Smooth muscle differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length[GO]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the smooth muscle tissue is

Muscle tissue which is unstriated, composed primarily of smooth muscle fibers surrounded by a reticulum of collagen and elastic fibers. Smooth muscle differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length[GO]. The atlas records it as a tissue at the tissue scale in the human body.

Where the smooth muscle tissue is

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What the smooth muscle tissue connects to

The atlas records 47 typed relationships for it, across 5 kinds of connection. a kind of muscle tissue.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the smooth muscle tissue. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as involuntary muscle, non-striated muscle, smooth muscle, textus muscularis nonstriatus, visceral muscle and visceral muscle tissue, and 1 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001135, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: muscle tissue.
• subtype: arrector muscle of hair, arteriole smooth muscle, artery smooth muscle tissue, blood vessel smooth muscle, bronchus smooth muscle and ciliary muscle, and 31 more.
• composed of: circular muscle layer of muscular coat, longitudinal muscle layer of muscular coat, muscular coat of vas deferens, orbitalis muscle, stomach muscularis externa and stomach smooth muscle inner oblique layer, and 1 more.
• contains: smooth muscle endomysium.
• contributes to morphology of: stomach muscularis externa.

Questions

Where is the smooth muscle tissue?

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What does the smooth muscle tissue connect to?

A kind of: muscle tissue.

Is the smooth muscle tissue 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.