Embryology Flashcards
where does the appendix arise from?
the midgut
Abnormal partitioning of the trachea and esophagus is the result of a defective _____________
tracheoesophageal septum
Cranial, caudal and lateral folding of the intraembyonic coelom occurs in the _____ week
4th
At which stage of lung maturation do Pneumocytes first appear?
Terminal Sac
The Endocardial Tube folds to become the ______
Primitive heart tube
Both the Foramen Ovale and Ductus Arteriosum work to bypass _____
Pulmonary circulation
The hepatic portal system is bypassed by
Ductus venosus
herniated bowl into the umbilical cord, or ________, results when the bowl fails to return to the abdominal cavity.
omphalocele
The Vasculogenic cell clusters of the splancnic plate mesoderm form the _____ tube
Endocardial
Hindgut gives rise to ________
Distal Colon, Cloaca
Primary Retroparitoneal structures develop from the __________
Intermediate Mesoderm
Central tendon of the diaphragm derives from the ____
septum transversum
A large diaphragmatic defect accompanied by a severe diaphragmatic hernia could result from failure of the _________ membrane to close off the _______ canal
pleuroparitoneal, paricardioparitoneal
All nephron components arise from growth factor communication in the _________
Metanephric Blastemal Cap
Labia Minora arrise from the____
urogenital folds
Homologous: Penis
Clitoris
In a patient lying supine, ascites (peritoneal fluid) is most often found in the omental bursa due to gravity and fluid moving into this space through the ______
foramen of Winslow (epiploic/ omental foramen)
What are the embryonic germinal components of the Bronchial lung buds
Endoderm and splanchnic lateral plate mesoderm
Homologous: Labia Majora
Scrotum
Bilateral renal agenesis arrises from ______ failing to form on both sides
mesonephric ducts
the Pericardioperitoneal canals travel behind the _____
Septum transversum
The _________ tissue is responsible for dividing the heart into four chambers and the outflow tract into pulmonary and aortic channels
endocardial cushion
what supplies the ventral pancreatic bud?
celiac trunk
the seminal vesicles arise from the________
Mesonephric duct
Nephrogenic ridge produces the _______(x3)
Pronephroi, Mesonephroi, Metanephroi,
when does the Mesonephros become active?
4th week
In the Lungs, the Lining of the respiratory tract, alvioli and glands arise from the ______
Endoderm
Babies born before 7 months do not produce a sufficient amount of ________, rendering them unable to breath normally.
surfactant
body cavities arrise from the
intraembryonic coelom (3rd week)
The metonephros form in the ______ region during the _____ week
pelvic, 5th
the pronephros forms at the _______ level at the end of the ______ week
cervicle, 3rd
Fusion of the right and left endocardial tubes form _____
the primitive heart tube
Pleuropericardial folds grow in to compartmentalize the the primitive pericardial cavity into ____ and ____
Pericardial cavity and pleural cavity
congenital diaphragmatic hernia involves
a hernia of the digestive organs (classically on the left side)
lungs develope from the _______ as a respiratory diverticulum
Foregut
Homologous: Labia Minora
Penile urethra
urogenital folds give rise to the ______
Labia Minora
The mesonephros forms from the _________ to ________ regions early in the ______ week
thoracic, Lumbar, 4th
cranial folding gives rise to
primitive pericardial cavity and pericardialparitonial cannals
In the Lungs, the splancnic lateral plate mesoderm gives rise to the _______
Pleura, Connective tissues and cartilages, blood vessels
Pleuroperitonial folds grow in to close off the _______
Pericardioperitoneal canals
Midgut gives rise to ______ and _______
Small intestine and Large intestine
allows communication between abdominal and thoracic cavities
pericardioperitoneal canals
septum transverum moves ____ and divides the ____ and _____
ventral and caudal , pericardial and peritoneal
Resistance to blood flow into the pulmonary arteries is significantly reduced ______
At Birth
some of the diaphram musculature is formed by the migrating ____________
paraxial mesoderm somites
Abnormal closure of the ventral body wall, or _________, results is protruding bowl that is not covered by amnion
gastroschisis
the _____________ grows in and separates the trachea and esophagus.
Tracheoesophageal ridge
the formation of the diaphram involves_______ (x4)
bringing down the septum transversum, the migration of paraxial mesoderm somites, the esophogeal mesoderm and the body wall mesoderm.
