Reproductive / VISUAL EXPLAINER
Is the Uterine Lining the Same as Its Muscle Wall?
The endometrium lines the uterine cavity, while the thicker myometrium outside it is smooth muscle. Its bundles interweave with supporting tissue and vessels; an outer serosal covering is present on some uterine surfaces.
READ THE IMAGE
What the illustration shows
English navy-and-gold poster comparing uterine endometrium and myometrium. Upper cutaway shows triangular empty cavity, pale glandular inner lining, broad coral muscle wall and thin outer covering, with direct labels. Lower enlarged wedge runs from cavity at left through glandular endometrium, interwoven smooth-muscle bundles and outer serosa at right. Serosa labels say where present. Tissue sizes are schematic. Gold AllHumanBody.com and complete slogan below.
How to interpret this poster
- Normal nonpregnant uterine-body teaching only; variable tissue proportions are not ultrasound cutoffs or menstrual timing. No fertility, labor or malignancy inference; serosa is not universal.
- AI-assisted educational illustration; not physician certification, microscopy, a diagnosis or individualized medical advice.
- Fine annotations need enlargement; the full description provides an accessible text alternative.
- Display the full uncropped illustration; do not trim titles, legends or boundary annotations.
AI-assisted educational illustration, adapted into web-sized images without changing its composition. This is general education, not an individual diagnosis or treatment recommendation.
EVIDENCE / CONTEXT
Sources and what they support
- University of Leeds histology guide ↗
Inner endometrium and outer smooth-muscle myometrium distinction.
- Duke University Medical School histology ↗
Interwoven myometrial smooth-muscle bundles with connective tissue.
- University of Minnesota faculty histology atlas ↗
Three wall regions and indistinct myometrial layers; perimetrium absent from this specific slide, not absent from the uterus.