Posted by ESB on August 24, 2011 at 07:47:14:
In Reply to: T/F Development of Lung and Lower Limb posted by Dr. Lazarus on August 21, 2011 at 12:20:38:
: 1.The primitive atrium is distinguishable as the smooth wall portion of the atria in the adult heart while the primitive ventricle is visible as trabeculae carneae in the adult
F - the primitive atria corresponds to the roughened area of the pectinate muscles.
: a.The smooth wall portion is the truncus arteriosus. This illustrates the understanding that the adult heart requires absorption of vascular supply and inflow and outflow tracts
F - the smooth wall portion is/was the sinus venosus
: 2.From the right atria, the embryological remnant visible through the fossa ovalis is the septum primum
F? -septum secundum closed the foramen ovale?
: 3.The myocardium of the heart is developed from lateral plate mesoderm and is specifically the somatopleuric (parietal) layer of lateral plate mesoderm
F - splanchnopleuric (visceral)
: 4.The pulmonary ligament is the location at which the parietal and visceral layers of the lateral plate mesoderm meet before reflecting on the body wall and gut tube endoderm, respectively
T? - I have no idea. A reflection would make sense since it's a pleural fold.
: 5.The transverse pericardial sinus is the location wherein the dorsal mesocardium brokedown and as a result permitted septation of the inflow and outflow tracts of the hearts
T
: 6.The interventricular septum, the endocardial cushions and the ductus arteriosus are directly involved with separation of the right and left ventricle
T - if this is asking about functionally separating them by fully separating the blood flow between the two.
: 7.During development, the ductus arteriosus, which connects the future ascending aorta and pulmonary arteries, prevents the left recurrent laryngeal nerve from ascending into the neck as the right recurrent laryngeal nerve ascends
T