PLACENTA AND FETUS

8          myometrium of uterus

30        epithelial cells of endometrium

31        endometrial (uterine) mucus gland

32        maternal blood vessels

33        decidua basalis of endometrium

34        proliferating syncytiotrophoblast

35        cytotrophoblast

36        lacuna containing maternal blood

37        primary mesoderm of embryo

38        yolk sac

39        operculum

40        amniotic cavity

41        extra-embryonic (exo-) coelom

            (surrounded by chorion)

42        forming body stalk

            (becomes umbilical cord)

43        maternal spiral arterioles

44        maternal venous sinus

45        intervillous space

46        chorionic villus

47        amnion

48        chorion

            (surrounding extraembryonic coelom)

49        umbilical cord

50        chorion frondosum

51        chorion laeve

52        decidua parietalis of endometrium

53        decidua capsularis

54        fetal vein

55        fetal artery

56        fetal surface of placenta

57        maternal surface of placenta

58        chorionic villus

59        margin