Vidal Lecture Scripts- Week 4 - Birth-Body Cavities - Diaphragm - Respiratory System and Limb Formation
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Questions and Answers

At what week does the embryonic period end?

  • Week 8 (correct)
  • Week 6
  • Week 9
  • Week 10

    • During which week does the fetus begin contributing urine to the amniotic cavity?

  • Week 5
  • Week 11
  • Week 9 (correct)
  • Week 7

    • When do fingers start separating in the upper limb buds?

  • Week 5
  • Week 7 (correct)
  • Week 8
  • Week 6

    • What is a notable feature of embryonic development in terms of upper and lower body parts?

    <p>Upper body develops before lower body</p> Signup and view all the answers

    What marks the beginning of the fetal period in human development?

    <p>End of week 9</p> Signup and view all the answers

    What is the purpose of brown fat in developing humans?

    <p>To regulate body temperature</p> Signup and view all the answers

    At what approximate week can it be possible to determine the sex of the fetus on ultrasound?

    <p>12-14 weeks</p> Signup and view all the answers

    What is the main function of the diaphragm in the human body?

    <p>Separating the thoracic and abdominal cavities</p> Signup and view all the answers

    What is the importance of surfactant in fetal lung development?

    <p>Prevents respiratory distress syndrome</p> Signup and view all the answers

    Which structure do somites develop next to during the formation of the neural tube?

    <p>Notochord</p> Signup and view all the answers

    When does the brown adipose tissue in developing humans transition into white fat?

    <p>28-30 weeks</p> Signup and view all the answers

    What landmarks are used to approximate the age of an embryo?

    <p>Development of somites</p> Signup and view all the answers

    During which developmental stage does bone marrow in humans take over blood production?

    <p>28th week</p> Signup and view all the answers

    At what stage do we observe the appearance of more advanced structures in the pharyngeal arches and cranial development?

    <p>27 somite stage</p> Signup and view all the answers

    What does the expansion of the future cranium indicate in embryonic development?

    <p>Creation of the forebrain</p> Signup and view all the answers

    Which structure arises from the somites according to the text?

    <p>Musculature for the body</p> Signup and view all the answers

    In what direction does the embryo fold to create the tube along its center?

    <p>Down</p> Signup and view all the answers

    What is the function of the notochord in the development of the embryo?

    <p>Tells ectoderm to turn into neural tube</p> Signup and view all the answers

    Which part of the somite is responsible for creating the outer muscular layers of the gut?

    <p>Splanknic mesoderm</p> Signup and view all the answers

    What is happening when cavitation or formation of interembryonic synomic spaces occurs?

    <p>Future body cavity formation</p> Signup and view all the answers

    What is the significance of the lateral mesoderm in embryonic development?

    <p>It plays a key role in creating body cavities through apoptosis and cell death</p> Signup and view all the answers

    During which week does the chance of survival for a premature delivery exceed 90%?

    <p>32 weeks</p> Signup and view all the answers

    Which type of mesoderm is responsible for wrapping around the future digestive tube to create smooth musculature?

    <p>Splanchnic mesoderm</p> Signup and view all the answers

    What is the main function of somites in embryonic development?

    <p>Create bony structures mainly the vertebrae</p> Signup and view all the answers

    What drives the folding motion of the embryo, particularly from front to back?

    <p>Growth along the neural tube</p> Signup and view all the answers

    What is the space for the future heart known as?

    <p>Pericardial</p> Signup and view all the answers

    Which region of the embryo starts pushing the cranial end and the tail down?

    <p>Neural tube</p> Signup and view all the answers

    What will the septum transversum eventually become?

    <p>Diaphragm</p> Signup and view all the answers

    Where does the future heart begin its development according to the text?

    <p>Above the head</p> Signup and view all the answers

    What happens when both the head, tail, and the sides come inward in the embryo?

    <p>They create a cavity housing the heart</p> Signup and view all the answers

    What structure, along with the pleuroperitoneal folds and dorsal mesentery holding the esophagus and aorta, primarily makes up the diaphragm?

    <p>Myoblasts from the body wall</p> Signup and view all the answers

    What structure, if it fails during development, can lead to a congenital diaphragmatic hernia?

    <p>Pleural peritoneal membranes</p> Signup and view all the answers

    Which statement best describes the role of the plural peritoneal membranes in diaphragm formation?

    <p>They grow as the lungs expand and ultimately fuse with the septum transversum.</p> Signup and view all the answers

    What happens during a congenital diaphragmatic hernia that leads to pulmonary hypoplasia?

    <p>Intestines block lung growth in the chest.</p> Signup and view all the answers

    Which feature of embryonic development could contribute to a congenital diaphragmatic hernia?

    <p>Formation of body wall muscles</p> Signup and view all the answers

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