Anatomio

Left side · Muscle · 3D study

Left external oblique

Inspect the left external oblique surface, then restore the available abdominal context. Right and left refer to the model, not the screen.

Atlas noteOriginal-source surface geometry; colors are illustrative. This partial study has not yet received specialist anatomical review.
LEFT SIDE · STRUCTURE STUDYBodyParts3D / 4.0
SELECTED · LEFT SIDE

Left external oblique

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Anatomioanatomio.org ↗3D: BodyParts3D / DBCLS · CC BY 4.0

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* Partial trunk model: thoracic and lumbar spine, sacrum, ribs, sternum parts, hip bones, selected muscles and 14 indexed costal cartilages. Discs, cervical spine, coccyx and organs are not included.

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Interactive study: Anatomio. Original geometry: BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International. Sources & changes · Model provenance

Educational draft · anatomical review pendingSources checked . Prepared with AI assistance; not yet reviewed by a qualified anatomist. Not for diagnosis or treatment.
Region
Abdomen
Side
Left
Source mesh
FJ1452M

Position and layer

The external oblique is the superficial flat muscle on the side of the abdominal wall. Internal oblique and transversus abdominis lie deeper; those layers are not loaded here.

Sources: OpenStax

Attachments and action

The external oblique arises from ribs 5–12. Its attachments include the anterior iliac crest, pubic tubercle and linea alba, the connective-tissue seam at the front midline.

It helps compress the abdominal contents and flex and rotate the trunk. These are anatomical functions, not movements simulated by this static model.

Use the ribs and hip bone as orientation landmarks. No attachment footprints are drawn on this mesh; the linea alba and aponeurosis are not separately selectable.

Sources: NCBI Bookshelf · StatPearls · BodyParts3D

Reading the surface

Its general fiber direction is downward and toward the midline. Together, abdominal muscles contribute to trunk movement and support of the abdominal contents.

The rendered surface is a source mesh, not a reconstruction of individual fibers. Display color is illustrative; no contraction is simulated.

Sources: OpenStax · BodyParts3D

Compare the two sides

Start with the isolated muscle. Show context restores the available trunk assembly; open Abdomen for the smaller regional selection.

Use Front and Oblique to compare the paired surfaces. Hip bones and lower ribs provide context, but attachment footprints, fascia and aponeuroses are not separately selectable objects.

Sources: BodyParts3D

Read the model

Explore left external oblique in 3D

  1. Inspect the surface. Rotate the isolated model without interpreting its color as tissue appearance.
  2. Compare the opposite side. Each side uses its own indexed source mesh.
  3. Open the regional view. Study the muscle against the available neighboring bones. Abdomen →

Sources and editorial status

This guide uses independently written explanations with links to the evidence behind them. Source checking and specialist anatomical review are separate steps; the latter is still pending.

  1. Anterolateral abdominal wall fascia

    External oblique attachments and actions. Independent factual summary; no figures or passages reproduced.

  2. Axial muscles of the abdominal wall and thorax

    Layer relationships and general fiber orientation. Brief independent factual summary; no illustrations reproduced.

  3. BodyParts3D / DBCLS · IS-A source index

    FMA13337 / FJ1452M: side-specific source identification; original coordinates and topology retained.

3D geometry and its separate license are credited beneath the viewer. References do not imply endorsement of this site.

Source identification

About this model

BodyParts3D identifies this surface as left external oblique: FMA13337 / FJ1452M. Its original coordinates and topology are preserved. Anatomical sides refer to the body, not the screen.

The trunk assembly includes thoracic and lumbar vertebrae, sacrum, ribs, sternum parts, hip bones, selected muscles and 14 indexed costal cartilages. Discs, cervical vertebrae, coccyx, organs and other trunk muscles are not loaded.

Back to Trunk →