What does the mothers body do with the waste products it collects from the fetus?
During pregnancy, the fetal circulatory system works differently than after birth: The fetus is connected by the umbilical cord to the placenta, the organ that develops and implants in the mother's uterus during pregnancy. Through the blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta. Waste products and carbon dioxide from
the fetus are sent back through the umbilical cord and placenta to the mother's circulation to be eliminated. The fetal circulatory system uses
two right to left shunts, which are small passages that direct blood that needs to be oxygenated. The purpose of these shunts is to bypass certain body parts? in particular, the lungs and liver ? that are not fully developed while the fetus is still in the womb. The shunts that bypass the lungs are called the foramen ovale, which moves blood from the right atrium of the heart to the left atrium, and the ductus arteriosus, which moves blood from the pulmonary artery to the aorta. Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus. The enriched blood flows through the umbilical cord to the liver and splits into three branches. The blood then reaches the inferior vena cava, a major vein connected to the heart. Most of this blood is sent through the ductus venosus, also a shunt that passes highly oxygenated blood through the liver to the inferior vena cava and then to the right atrium of the heart. A small amount of this blood goes directly to the liver to give it the oxygen and nutrients it needs. Waste products from the fetal blood are transferred back across the placenta to the mother's blood. Inside the fetal heart:
At birth, the umbilical cord is clamped and the baby no longer receives oxygen and nutrients from the mother. With the first breaths of life, the lungs begin to expand. As the lungs expand, the alveoli in the lungs are cleared of fluid. An increase in the baby's blood pressure and a significant reduction in the pulmonary pressures reduces the need for the ductus arteriosus to shunt blood. These changes promote the closure of the shunt. These changes increase the pressure in the left atrium of the heart, which decrease the pressure in the right atrium. The shift in pressure stimulates the foramen ovale to close. The closure of the ductus arteriosus and foramen ovale completes the transition of fetal circulation to newborn circulation.
Placenta, Umbilical Cord, and Amniotic SacYour baby will develop inside your uterus with the help of a fetal life-support system composed of the placenta, the umbilical cord, and the amniotic sac (which is filled with amniotic fluid). Learn more about your baby’s fetal life-support system: What is the placenta and what does it do?The placenta has been described as a
pancake-shaped organ that attaches to the inside of the uterus and is connected to the fetus by the umbilical cord. The placenta produces pregnancy-related hormones, including chorionic gonadotropin (hCG), estrogen, and progesterone. What is the umbilical cord and what does it do?The umbilical cord is the life-line that attaches the placenta to the fetus. 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 can grow to be 60 cm long, allowing the
baby enough cord to safely move around without causing damage to the cord or the placenta. Cord Blood & Cord Tissue Banking?After your baby is born, stem cells from the cord blood and tissue can be collected and saved for potential future use. This process is known as banking. If Learn more about the benefits of cord blood banking from our sponsors ViaCord and Affordable Cord Care. What is the amniotic sac and what does it do?The amniotic sac is filled with amniotic fluid. This sac is your baby’s home, gymnasium, and protection from outside knocks, bumps, and other external pressures. The amniotic sac allows the fetus ample room to swim and move around which helps build muscle tone. To keep the baby cozy, the amniotic sac and fluid maintain a slightly higher temperature than the mother’s body, usually 99.7 F. Are the placenta, umbilical cord, and amniotic sac different when dealing with multiple births?Identical twins often share the same placenta, usually have separate amniotic sacs, and always have their own umbilical cords. Non-identical twins have separate placentas, amniotic sacs, and umbilical cords. Want to Know More?
class=”mac”>Última actualización: 07/2014 How does the mother deposit the wastes from the Foetus?Through the placenta, your baby will also deposit waste products that you transfer out of your own body. So, there's no poop or pee floating around your womb for the entire nine months.
What happens to waste in the placenta?Your blood passes through the placenta and provides oxygen, glucose and nutrients to your baby through the umbilical cord. The placenta can also filter out harmful waste and carbon dioxide from your baby's blood.
How is the waste products of a developing baby removed still inside the mother womb?Umbilical cord.
It carries oxygen and nutrients to the fetus and waste products away from the fetus.
How are wastes removed after birth?Waste products and carbon dioxide from the baby are sent back through the umbilical cord blood vessels and placenta to the mother's circulation to be eliminated.
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