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Placenta & maternal–fetal interface: labelled teaching diagram. Original labels and colours retained.
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Chorionic villi

Locate chorionic villi 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 & maternal–fetal interface: 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.

Placenta & maternal–fetal interface

Early development

Placenta & maternal–fetal interface

STRUCTURE & FUNCTION

Understand what you see.

Supports exchange and endocrine functions during pregnancy.

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. Chorionic villi project into maternal intervillous spaces
  2. Fetal vessels run within villi
  3. Maternal and fetal blood are normally separated by placental tissues
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 (1)

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

  • Decidua basalis
03 / VIVA PRACTICE

Think first. Then reveal.

Say your answer aloud before opening the suggested response.

01How would you identify placenta & maternal–fetal interface?
SUGGESTED ANSWER

Chorionic villi project into maternal intervillous spaces. Fetal vessels run within villi. Maternal and fetal blood are normally separated by placental tissues.

02Do maternal and fetal blood normally mix freely in the placenta?
SUGGESTED ANSWER

No. Exchange occurs across placental tissues; maternal blood bathes villi while fetal blood remains within fetal vessels under normal conditions.

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.