Humerus

One arm bone, two forearm neighbors

The humerus is the single bone of the arm between shoulder and elbow. Distally, it meets both forearm bones.

The isolated view emphasizes shape; Show context restores its place in the limb. Do not mistake an isolated rendering for a separate anatomical region.

Sources: OpenStax · upper-limb bones

From the head to the elbow end

Near the head are the greater and lesser tubercles. Distally, the medial and lateral epicondyles flank the joint region; the olecranon fossa lies posteriorly.

Inspect Front and Back before focusing on a small feature. Names in the text are not separate selection targets, and fine surface detail is limited by the source mesh.

Sources: OpenStax · upper-limb bones

Match each surface to its neighbor

The head meets the scapular glenoid. At the elbow, the trochlea meets the ulna and the capitulum meets the radius.

All three neighboring bones are included in this page’s arm context. The elbow study offers a regional alternative, but omits the scapula.

Front, Back and Oblique change the camera only. The bone positions stay fixed; this scene does not demonstrate joint motion, cartilage contact or ligament tension.

Sources: OpenStax · upper-limb bones

A shaft landmark and a passing tendon

Deltoid attaches at the deltoid tuberosity. The long biceps tendon passes through the intertubercular groove; that passage is not its insertion on the humerus.

Compare the deltoid parts and long biceps head already present in the scene. Their source meshes do not separately distinguish all tendon layers or outline bone attachment footprints.

Sources: Arm anatomy tables

Read the model

Explore humerus in 3D

1. Compare the upper and lower ends. Rotate the isolated humerus, using Focus selection if needed. Back is useful when studying the posterior surface of its distal end.
2. Restore the three neighboring bones. Choose Show context, select Humerus and enable Fade others. Use the list to compare Scapula, Radius and Ulna one at a time.
3. Continue at the elbow. Open the regional elbow study to compare the three bones with its available muscle layer. This changes the subset, not the identity of the humerus. Open elbow study →

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. OpenStax — Anatomy and Physiology 2e, 8.2: Bones of the Upper Limb

   Humerus, radius and ulna: major landmarks and joint relationships. Used to check anatomical facts; no source prose or illustrations reproduced.

2. Texas Tech University Health Sciences Center El Paso — Axilla, Posterior Shoulder, & Arm

   Osteology and muscle rows: selected bony landmarks and muscle attachments, not a complete attachment inventory.

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