
Locate fetal capillaries 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.
placenta: labelled anatomical figure. Original source colours and labels retained.
Image: OpenStax / University of Hawaiʻi adapted teaching figures; original contributors credited at source · Source / original · CC BY 4.0 — figure credits at sourceNumbered markers and focused views are Mediveerse learning overlays; the original reference is linked above.
Chorion and chorionic villi
Understand what you see.
Forms the fetal placental interface and supports exchange through villous architecture.
Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.
How to recognise it.
- Outer fetal membrane
- Villi project toward maternal tissues
- Villi contain fetal vascular cores at mature stages
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.
Think first. Then reveal.
Say your answer aloud before opening the suggested response.
01How do you identify chorion and chorionic villi?+
Outer fetal membrane. Villi project toward maternal tissues. Villi contain fetal vascular cores at mature stages.
02Name the stages of chorionic villi.+
Primary villi have trophoblast cores; secondary villi acquire extraembryonic mesoderm; tertiary villi contain fetal vessels.
03Which chorionic region contributes most to placenta?+
Chorion frondosum at the embryonic pole; villi regress over the smoother chorion laeve.
04Which structures should you point out on this reference?+
Trophoblast covering; Mesodermal core; Fetal capillaries. Forms the fetal placental interface and supports exchange through villous architecture.
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.