35 Questions
At what week does the embryonic period end?
Week 8
During which week does the fetus begin contributing urine to the amniotic cavity?
Week 9
When do fingers start separating in the upper limb buds?
Week 7
What is a notable feature of embryonic development in terms of upper and lower body parts?
Upper body develops before lower body
What marks the beginning of the fetal period in human development?
End of week 9
What is the purpose of brown fat in developing humans?
To regulate body temperature
At what approximate week can it be possible to determine the sex of the fetus on ultrasound?
12-14 weeks
What is the main function of the diaphragm in the human body?
Separating the thoracic and abdominal cavities
What is the importance of surfactant in fetal lung development?
Prevents respiratory distress syndrome
Which structure do somites develop next to during the formation of the neural tube?
Notochord
When does the brown adipose tissue in developing humans transition into white fat?
28-30 weeks
What landmarks are used to approximate the age of an embryo?
Development of somites
During which developmental stage does bone marrow in humans take over blood production?
28th week
At what stage do we observe the appearance of more advanced structures in the pharyngeal arches and cranial development?
27 somite stage
What does the expansion of the future cranium indicate in embryonic development?
Creation of the forebrain
Which structure arises from the somites according to the text?
Musculature for the body
In what direction does the embryo fold to create the tube along its center?
Down
What is the function of the notochord in the development of the embryo?
Tells ectoderm to turn into neural tube
Which part of the somite is responsible for creating the outer muscular layers of the gut?
Splanknic mesoderm
What is happening when cavitation or formation of interembryonic synomic spaces occurs?
Future body cavity formation
What is the significance of the lateral mesoderm in embryonic development?
It plays a key role in creating body cavities through apoptosis and cell death
During which week does the chance of survival for a premature delivery exceed 90%?
32 weeks
Which type of mesoderm is responsible for wrapping around the future digestive tube to create smooth musculature?
Splanchnic mesoderm
What is the main function of somites in embryonic development?
Create bony structures mainly the vertebrae
What drives the folding motion of the embryo, particularly from front to back?
Growth along the neural tube
What is the space for the future heart known as?
Pericardial
Which region of the embryo starts pushing the cranial end and the tail down?
Neural tube
What will the septum transversum eventually become?
Diaphragm
Where does the future heart begin its development according to the text?
Above the head
What happens when both the head, tail, and the sides come inward in the embryo?
They create a cavity housing the heart
What structure, along with the pleuroperitoneal folds and dorsal mesentery holding the esophagus and aorta, primarily makes up the diaphragm?
Myoblasts from the body wall
What structure, if it fails during development, can lead to a congenital diaphragmatic hernia?
Pleural peritoneal membranes
Which statement best describes the role of the plural peritoneal membranes in diaphragm formation?
They grow as the lungs expand and ultimately fuse with the septum transversum.
What happens during a congenital diaphragmatic hernia that leads to pulmonary hypoplasia?
Intestines block lung growth in the chest.
Which feature of embryonic development could contribute to a congenital diaphragmatic hernia?
Formation of body wall muscles
This quiz focuses on the observation and understanding of embryonic development, specifically looking at the folding and formation of layers such as ectoderm, mesoderm, and endoderm. The quiz includes identifying the neural tube and its relation to different layers.
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