Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
L11 Fetal System vs. Adult System 101 Heart develops in the 3rd and 4th weeks in uterus th 8 week the organ systems are functioning (eg. The heart) th The 4 month the fetal heart beat is loud enough to hear Fetal system is not the same as the adult system L11 What is the Fetal System different? 102 The fetus is unable to breath air In the womb, therefore sending the blood to the lungs is pointless. The fetus must get nutrients from the mother as well let her take care of its waste L11 4 Features not Present in Adults! 103 1. Oval Opening: foramen ovale Opening between the two atria, covered by a flap that acts like a valve bypasses the pulmonary circuit. If it doesn‘t close after birth=blue babies, from a mixing of blood and they need open heart surgery L11 4 Features not Present in Adults! 104 2. Arterial Duct: ductus arteriosus Connects pulmonary artery and aorta. The arterial duct s function is to bypass the pulmonary circuit. L11 4 Features not Present in Adults! 105 3. Umbilical Arteries and Veins Vessels that travel to and from the placenta. Exchange of gases, nutrients and waste with the mother. 4 Features not Present in Adults! 106 4. Venous Duct: ductus venosus Connects umbilical vein to the vena cava it attaches right at the baby s liver, but bypasses most of the liver. Ductus venosus 108 110 112 L11 Fetal Circulation Assignment 113 Draw a schematic (simplified version) of the following two circulatory systems and include. 1. blood flow arrows. 2. All of the listed parts. 1. Adult circulation: heart, aorta, body, liver, lungs, vena cava, p artery, p vein 2. Fetal circulation: heart, aorta, body, liver, lungs, vena cava, p artery, p vein, umbilical artery, umbilical vein, forum ovale, ductus arteriosis, venus ductus. 113 th See pg 311-314 BC Bio Add to summary 5 thing L11 eg. Adult....schematic 114 114