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Why is circulation to the lungs bypassed in fetal pigs?
It is bypassed because there is no need for the blood to go to the lungs and get "pick up" if the pig is dead.
What are the two fetal circulation bypasses found in the fetal pig?
Because the fetal lungs are inactive, the pulmonary circuit is bypassed. Half of the blood that enters the right atrium flows directly into the left atrium through the foramen ovale. The remainder flows from the right atrium to the right ventricle, then into the pulmonary trunk. The second bypass, the ductus arteriosus, transports the blood directly from the pulmonary artery into the aorta so it can be sent into systemic circulation.
In fetal circulation the ductus arteriosus?
In fetal circulation, the ductus arteriosus is a connective vessel between the pulmonary artery and aorta. It works as to bypass the lungs, which are collapsed in the womb. After birth, the ductus arteriosus normally closes.
In fetal circulation the small vessel connecting the pulmonary artery with the descending thoracic aorta is called the?
ductus arteriosum
Why is it important for the fetal heart to have both the ductus arteriosus and the foramen ovale but not good for the adult heart to have these?
The ductus arteriosus and foramen ovale are important for systemic circulation. This is the type of circulation maintained by fetal pigs but the adult heart requires pulmonary and systemic circulation.
How does fetal circulation differ from the circulation pattern after birth?
In fetal circulation, the placenta provides oxygen and nutrients to the fetus, so the lungs are not used for oxygen exchange - instead, a bypass called the ductus arteriosus shunts blood away from the lungs. After birth, the lungs take over oxygen exchange, the ductus arteriosus closes, and the foramen ovale between the atria closes, redirecting blood flow through the heart to support pulmonary circulation.
Why is it important for the fetal heart to have both the ductus arteriosus and the foramen ovale but not good for the adult heart to have these feature?
The ductus arteriosus and foramen ovale are important for systemic circulation. This is the type of circulation maintained by fetal pigs but the adult heart requires pulmonary and systemic circulation.
What structure is used to connect the aorta and the pulmonary artery in fetal circulation?
Ductus arteriosus
Why is it not necessary for large quantities of blood to enter the pulmonary system of a fetus?
The pulmonary circuit is to exchange respiratory gases between the blood and inhaled air. As a fetus is not yet breathing on its own but receives its oxygen from the mother through the umbilical vein it surpasses the normal function of the pulmonary circuit and is not necessary.
What functions does the foramne ovale serve in fetal circulation?
The foramen ovale is a crucial shunt in fetal circulation that allows blood to bypass the non-functioning fetal lungs. It connects the right atrium to the left atrium, enabling oxygen-rich blood from the placenta to flow directly into systemic circulation. This adaptation helps maintain efficient oxygen delivery to the developing fetus while circumventing the pulmonary circuit, which is not needed until birth. After delivery, the foramen ovale typically closes, transforming into the fossa ovalis as the newborn begins to breathe air and the lungs become functional.
What major organ system is bypassed in fetal circulations other than for purpose of nutrition?
The lungs are the major organ system bypassed in fetal circulation, as the fetus receives oxygen and nutrients from the mother through the placenta instead of through respiration. Once born, the ductus arteriosus and foramen ovale close, redirecting blood flow to the lungs for oxygenation.
Vein of the fetal pig that carries oxygenated blood?
There are two veins that carry oxygen they are the Pulmonary vein and the Umbilical vein:-)
