Development of the Sinus Venosus The sinus venosus receives venous blood from the right and left sinus horns in the middle of week four. The veins that supply this blood include the vitelline vein, the umbilical vein, and the common cardinal vein. At first, a lot of connection between the atrium and sinus occurs. The […]
Formation of Heart-Atria Development Read More »
The nutritional supply of an embryo varies depending on its stage of development During the first week, before implantation, deutoplasm (accumulated cytoplasmic nutrients) of oocyte supplies nutrition. During the second week, breakdown products of endometrium (due to implantation) nourishes the embryo by simple diffusion. After the third week, maternal blood nourish embryo through utero placental
Formation of Heart-Embryo changes Read More »