The key to a healthy vegetarian diet is variety. Just as your parents should be concerned if you only eat. hamburgers, they should also worry if you only eat potato. chips and salad. A healthy and varied vegetarian diet includes vegetables, fruits, plenty of leafy greens, whole grain products, nuts, seeds, and legumes. Some vegetarians choose to eat dairy. products and/or eggs, while vegans do not eat these foods. Teenage vegetarians have nutritional requirements that. are the same as other teens.
During prenatal development, the umbilical cord is physiologically and genetically part of the fetus and, (in humans), normally contains two arteries (the umbilical arteries) and one vein (the umbilical vein), buried within Wharton's jelly.
The umbilical vein connects to the systemic circulation, by way of the portal sinus, pre-sumably via hepatic sinusoids (1) to the hepatic veins. The portal sinus is dilated. D, Absent ductus venosus. The umbilical venousreturn bypasses the portal sinus and the liver.