Question

Table 22.4 Fetal Cardiovascular Structures and Associated Postnatal Structures Postnatal Structure Function of Fetal Cardiovascular Structure Fetal Cardiovascular Structure Ductus Arteriosus Ductus Versus Foramen Ovale Umbilical Arteries Umbilical Vein 1926be6ea548219Sade

Answer 1

Solution

Fetal cardiovascular structure	Postnatal structure	function of fetal cardiovascular structure
ductus arteriosus	It is a short blood vessel that connects the pulmonary artery to the aorta in the developing fetus.	It allows for it to bypass the pulmonary circulation and enter directly into the systemic circulation.
ductus venosus	ductus venosus connects the left portal vein to the inferior vena cava ductus venosus closes after birth due to changes in intracardiac pressures and a decrease in endogenous prostaglandins	it allows oxygenated blood from the placenta to bypass the liver.
Foramen ovale	It is a opening located at the base of the greater wing of the sphenoid	to transfer meningeal artery and mandibular nerve through it.
umbilical arteries	umbilical artery regresses or returns after birth.After birth the umbilical artery completely disappears and its distal part becomes the medial umbilical ligament, but the proximal part of the umbilical artery gives rise to the superior vesical arteries.	The umbilical arteries supply deoxygenated blood from the fetus to the placenta.
umbilical vein	after birth the neonate's umbilical vein is completely disappears and is replaced by a fibrous cord called the round ligament of the liver.	It carries oxygenated blood from the placenta into the growing fetus.It also provides convenient access to the central circulation of a neonate for restoration of blood volume and for administration of glucose and drugs