FORMATION AND ROLE OF PLACENTA - Columbia University
implantation and formation of the placenta The endometrium (Fig 17-1) The uterus is made up of a wall of smooth muscle, the myometrium, lined by a thick mucosa, the endometrium, which is a layer of loose connective tissue lined by simple columnar epithelium containing glands and supplied by a specialized vascular system
Human Placental Structure and Development
To outline the structure of the mature placenta • To outline development of the placenta • elaboration of the villous trees • the intrauterine environment during the first trimester • establishment of the maternal circulation to the placenta • To consider remodelling of the early placenta and formation of the smooth membranes
Histology of Human Placenta
and the formation of the placenta begins [1,2] The trophoblastic tissue covering the outer side of the inner mass, the so-called polar trophoblast (Figure 1A), represents the blastocyst tissue that adheres, attaches and implants into the uterine wall After the attachment to the uterine decidua, the polar trophoblast
From Trophoblast to Human Placenta
maternal vascular blood flow into the placenta, and delivery II Formation of the placenta As early as three days after fertilization, the trophoblasts—the major cell type of the placenta—begin to make human chorionic gonadotropin (hCG), a hormone which insures that the endometrium will be receptive to the implanting embryo
Scarsdale Public Schools / Overview
D) placenta formation and metamorphosis 7 What normally happens immediately after fertilization in sexual reproduction? A) specialization of cells to form a fetus from an egg B) production of daughter cells having twice the number of chromosomes as the parent cell C) production of daughter cells having half the
The Role of Macrophages in the Placenta - IntechOpen
Placenta formation occurs through a complex and coordinated effort between the fe tus s extraembryonic tissues and the gravid endometrial tissues Many macrophages are present in the placenta throughout pregnancy and have been detected as early as day 10 of pregnancy (Chang et al , 1993) Placental macrophages include Hofbauer cells of the
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