Umbilical vein The umbilical vein has oxygenated blood from the placenta and

Umbilical vein the umbilical vein has oxygenated

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Umbilical vein The umbilical vein has oxygenated blood from the placenta and delivers it to the fetus. It splits into the ductus venosus and the anastomosis to the portal vein. Anastomosis between umbilical vein and portal vein Delivers from the umbilical vein oxygen rich blood and nutrients to the liver Ductus venosus From the umbilical vein, the ductus venosus delivers oxygen-rich blood to the inferior vena cava. Foramen ovale A patent opening between the right atrium and left atrium acting as a right-to-left shunt , thus partially bypassing the right ventricle that would be delivering blood to the lungs. Ductus arteriosus An opening between the pulmonary trunk and the aortic arch acting as a right-to-left shunt , thus partially bypassing the pulmonary arteries to the lungs. Common iliac arteries At the bifurcation of the abdominal aorta are the common iliac arteries delivering blood to the pelvis and lower extremities. Internal iliac artery At the bifurcation of the common iliac artery are the external and internal iliac arteries. The umbilical arteries attach to the internal iliac arteries to continue to the placenta. These structures can be observed in Figure 9.20 Umbilical Cord
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Foster P a g e | 11 IDENTIFY the umbilical arteries, umbilical veins, ductus arteriosus, foramen ovale, internal iliac artery POSTNATAL CIRCULATION AND THE ADULT REMNANTS Structures Notes Round ligament of liver Fetal structure: umbilical vein Fossa ovalis Fetal structure: foramen ovale Ligamentum arteriosum Fetal structure: ductus arteriosus Ligamentum venosum Fetal structure: ductus venosus Medial umbilical ligament Fetal structure: umbilical arteries These structures can be observed in Figure 9.21
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Foster P a g e | 12 1. Lung models Examine the models and identify all the structures. Microanatomy Structures - Model Model/Notes Type I Pneumocyte Type II Pneumocyte Respiratory membrane Pulmonary capillary Basement membrane Endothelial cell Elastic fibers Pulmonary venule Pulmonary arteriole Alveolar pore Lung Structures Models/notes Apex Base Right lung Left lung Superior lobe of right lung Middle lobe of right lung Inferior lobe of right lung Superior lobe of left lung Inferior lobe of left lung Hilum of the lung Bronchopulmonary segments Horizontal fissure Oblique fissure Branches of pulmonary arteries Branches of pulmonary veins Lobar bronchii LAB #13: IN-LAB ACTIVITIES
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Foster P a g e | 13 Muscles of ventilation Model Diaphragm Central tendon Aortic hiatus Esophageal hiatus Caval opening External intercostals, scalenes, SCM Internal intercostals and abdominal muscles Pulmonary circulation Model Pulmonary trunk Pulmonary arteries and branches Pulmonary veins and branches Pulmonary capillary bed 2. Cadaver and real lungs __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ Structures Model Parietal pleura Costodiaphragmatic recess Visceral pleura
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Foster P a g e | 14 3. Histology of the trachea and lungs Examine the microscopes and identify the structures indicated. 4. Circulation of the heart including pre- and postnatal circulation Recite the circulation of the heart through the pulmonary and systemic circuits. Draw out the pre- and postnatal circulation. Histology NOTES Trachea Hyaline cartilage Pseudostratified ciliated columnar epithelium Goblet cells Lungs and Bronchioles Bronchi Bronchioles Pulmonary blood vessel Alveolus Prenatal circulation Placenta Umbilical cord Umbilical arteries Umbilical vein Anastomosis between umbilical vein and portal vein Ductus venosus Portal vein Foramen ovale Ductus arteriosus Common iliac arteries Internal iliac artery
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  • Spring '19
  • Umbilical vein

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