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Embryonic folding: labelled teaching diagram. Original labels and colours retained.
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Lateral body folds

Locate lateral body folds on this anatomical reference. Read the original plate labels to confirm the view and adjacent structures.

Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.

Embryonic folding: labelled teaching diagram. Original labels and colours retained.

Image: OpenStax College / university open textbook · Source / original · CC BY 4.0

Numbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.

Embryonic folding

Early development

Embryonic folding

STRUCTURE & FUNCTION

Understand what you see.

Establishes the body form and positions developing organ systems.

Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.

01 / IDENTIFICATION

How to recognise it.

  1. A flat disc changes into a more cylindrical body form
  2. Head and tail folds occur in the longitudinal plane
  3. Lateral folding incorporates part of the yolk sac into the primitive gut
02 / KEY STRUCTURES

Point them out.

Tap a number to open its reference, zoom in and locate the structure. Numbers stay the same across views. This key follows landmarks visible in the reference images.

Related features & study points (3)

Additional relations, attachments or microscopic details to revise alongside this plate. These are separate from its numbered image landmarks.

  • Head fold
  • Tail fold
  • Connecting stalk
03 / VIVA PRACTICE

Think first. Then reveal.

Say your answer aloud before opening the suggested response.

01How would you identify embryonic folding?
SUGGESTED ANSWER

A flat disc changes into a more cylindrical body form. Head and tail folds occur in the longitudinal plane. Lateral folding incorporates part of the yolk sac into the primitive gut.

02How does folding contribute to the primitive gut?
SUGGESTED ANSWER

Part of the endoderm-lined yolk sac is incorporated into the embryo as the primitive gut tube.

Read the references.

Credited anatomical plates, microscopy and university teaching references. Individual image credits appear below the viewer. Historical plates can use older terminology; use the lesson text for current names.