Figure 5 (below). Close-up views of uteri models showing their wall layers and major regions. Wall layers are the outer perimetrium (a) made of visceral peritoneum, thick middle myometrium (b) of smooth muscle, and inner endometrium (c). Major regions include the anterior/superior dome-like fundus (d), body (e), and narrow cervix (f). The cervix drops into the vagina (h) for a short distance, thus forming a space between it and the vaginal wall. This space is the fornix (arrows).