Search results
Results from the WOW.Com Content Network
Primary: The chorionic villi are at first small and non-vascular. 13–15 days: trophoblast only [1] Secondary: The villi increase in size and ramify, while the mesoderm grows into them. 16–21 days: trophoblast and mesoderm [1] Tertiary: Branches of the umbilical artery and umbilical vein grow into the mesoderm, and in this way the chorionic ...
In the placenta, the intervillous space is the space between chorionic villi, and contains maternal blood.. The trophoblast, which is a collection of cells that invades the maternal endometrium to gain access to nutrition for the fetus, proliferates rapidly and forms a network of branching processes which cover the entire embryo and invade and destroy the maternal tissues.
The yolk sac is an ancient structure. It's found in fish and probably the last common ancestor of vertebrates. The fish structure was innovated upon by the amniotes (reptiles, birds, and later mammals), which evolved bigger yolks and tougher eggs for life on land. The placental mammalian yolk sac is a further elaboration of the amniote ...
Hints and the solution for today's Wordle on Wednesday, December 4.
A cytotrophoblast cap penetrates through the fetus' syncytiotrophoblasts and reaches the maternal decidua, forming the anchoring villus. [1] [3] [4] The cytotrophoblast layer spreads and contacts the cytotrophoblast layers of neighboring anchoring villi, creating a continuous layer called the cytotrophoblastic shell.
Indiana may not have been one of the very best teams in college football, but a team that goes 11-1 in a power conference was always going to be a foregone conclusion to make the 12-team College ...
Intestinal villi (sg.: villus) are small, finger-like projections that extend into the lumen of the small intestine. Each villus is approximately 0.5–1.6 mm in length (in humans), and has many microvilli projecting from the enterocytes of its epithelium which collectively form the striated or brush border .
Celebrity: American actress and film producer Reese Witherspoon Animal:Donkeys Names: Honky and Tonky Make a good pet? Yes, if you have the space. Catherine of Aragon’s monkey