Mathematics
It has no specific name.
You need at least two things for something to lie between.
Usually that sort of question wants to know where the square root lies. It is between 7 and 8.
Calculate the average of the two numbers.
urinary bladder
Two - 1 artery and 2 veins
Lymphangions are segments of lymphatic vessels that are bounded by valves.
The umbilical cord is made up of three blood vessels: two smaller arteries which carry blood to the placenta and a larger vein which returns blood to the fetus.
it has two arteries along with a single vein
The umbilical cord is attached to the developing fetus at the navel, and it has two main blood vessels in it; the umbilical artery and the umbilical vein. These vessels form a network of capillaries at the placenta, which is the temporary organ on the wall of the mother's uterus which forms during pregnancy. In the placenta, the mother's blood vessels also narrow to capillaries. The baby's capillaries and the mother's capillaries come side by side, and in that way metabolic wastes diffuse from the baby's blood to the mother's blood so her body can excrete them, and the baby's blood picks up O2 and nutrients from the mother's blood. The umbilical cord is the connection between the baby and the mother, and the placenta is the area in a pregnant woman's uterus which is the site of exchange of various wastes and nutrients between mother and child. The baby's blood and the mother's blood, however, never directly mixes. Everything is accomplished via diffusion between the capillaries in the placenta.
Shunt
An umbilical cord has three veins: 1) The one that carries oxygen and nutrients to the fetus. This particular vein is found in Wharton's Jelly (Gelatinous substance). 2) The other two are the arteries in which it carries deoxygenated nutrient-and-depleted blood away.
The umbilical cord is a tough membrane that covers the two arteries (the umbilical arteries) and one vein (the umbilical vein) that are coated in Wharton's jelly. Wharton's jelly is a gelatinous substance within the umbilical cord. It is derived from extra-embryonic mesoderm.
I think you mean a two vessel cord. The cord usually has three vessels, two arteries and a vein, occasionally there is only one artery which may mean there is some problem with the baby, possibly with the kidneys.
The two structures that are connected by the umbilical cord are the embryo and the placenta. The umbilical cord is also known as the navel string or birth cord.
Anastomosis