Embryology Flashcards
oropharyngeal membrane becomes what structure?
- the mouth
The heart cells form _____ the oropharyngeal membrane
- above or below?
- above
- moves down into the thorax by crainocaudal folding
Yolk sac does what during development?
- thins out
- becomes the gut
What is the arterial supply to the foregut?
- coeliac trunk
What is the arterial supply to the midgut?
- superior mensenteric artery
What is the arterial supply to the hindgut?
- inferior mesenteric artery
What is Ileal (Meckel’s) Diverticulum
- persistence of the vitelline duct forming an outpouching of the ileum
- may become inflames and harbour abnormal tissue
- Rule of 2s
When does the respiratory diverticulum appear?
- end of week 3
What happened during week 4-7 in terms of oesophagus development?
- oesophagus lengths rapidly due to descent of heart and lungs
What may happen if the oesophagus fails to grow?
- the stomach may be placed cranially in the thorax, forming a congenital hiatal hernia
The ventral wall of the stomach grows much _____ the the dorsal wall.
- grows a lot slower
- this is part of the change in shape of the stomach - J shape
Rotation of the stomach?
- clockwise 90 degrees around the longitudinal axis
- LARP
(Left anterior, right posterior)
What is the greater omentum?
- apron like structure
Explain the formation of the duodenum?
- as the stomach rotates the duodenum move from the midline to the right side of the abdominal cavity
What happens during week 10 in the abdomen?
- intestines retract back into abdomen with a further 180 degree clockwise turn
