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NWHSU Mash GA2Q1E Ca
NWHSU Mash GA 2 Quiz 1 Embryo Cardiac
Question | Answer |
---|---|
WEEK in which the vascular system appears | 3rd |
Give the day when the heart: a) begins to beat b) tubes fuse | a. 22-24, b. 21 |
Name the 3 embryonic arterial networks formed by the end of the 3rd week. | Vitelline, umbilical, and dorsal aortae |
vessels which develop from blood islands of the yolk sac (be specific) | Vitelline |
Due to the _____ degree rotation of the ____________ plate, the future pericardial cavity lies __________ ( dorsal, ventral ) to the developing heart. | 180 Prochordal plate and cardiogenic plate Ventral |
Embryonic component responsible for forming the myocardium (do NOT list mesenchyme or mesoderm) | Myoepicardial or Epimyocardial mantle |
The entire heart is derived from ________ mesoderm located in the ______ plate | Splanchnic;, cardiogenic or lateral plate |
During early development, the primitive heart is suspended in the __________ cavity by a mesentery known as the dorsal ___________ | Pericardial, Mesocardium |
major intraembryonic arteries formed near midline of the embryo | Dorsal aortae |
Forms the auricles | Original embryonic common atrium |
Name given to the distal 1/3rd of the bulbus cordis | Truncus arteriosus |
Briefly discuss the directional movements of the bulbus cordis and primitive ventricle as the bulboventricular sulcus develops. | The bulbus cordis gets shifted to the right of the pericardial cavity, and the primitive ventricle gets shifted to the left of the pericardial cavity |
Name give to the middle 1/3rd of the bulbus cordis | Conus cordis |
Embryonic component forms NONtrabeculated part of right ventricle | Conus cordis |
forms the NONtrabeculated part of the left ventricle | Conus cordis |
Name the adult derivatives of the middle 1/3rd of the bulbus cordis | Conus arteriosus and aortic vestibule |
SPECIFICALLY, what causes the interventricular foramen to close? (use adult structures for your answer ) | Membranous part of IV septum and muscular part of IV septum |
Forms trabeculated part of right ventricle ONLY | Trabeculated part of bulbus cordis, proximal 1/3rd of bulbis cordis |
Forms the smooth-walled part of the left atrium | Single Primitive Pulmonary Vein |
Forms the trabeculated part of the left ventricle ONLY | Primitive ventricle |
Give the derivatives of: a. the right horn of the sinus venosus b. the left horn of the sinus venosus | a. Sinus venarum b. Coronary sinus |
forms the principle cavity of right atrium | Right horn of sinus venosus |
Partitioning of the common atrium is first indicated by the appearance of ______ _______ | Septum primum |
opening that forms when the upper part of septum primum perforates | Ostium secundum |
Foramen ovale forms within this embryonic structure | Septum secundum |
The definitive derivative of the left common cardinal vein | Oblique vein of left atrium |
Briefly discuss the development of the atrioventricular canals | The superior and inferior endocardial cushions grow and fuse across the single atrioventricular canal forming right and left atrioventricular canals: e.g. R. AV canal opens from R atrium into R ventricle, L AV canal opens from L atrium into L ventricle |
SPECIFICALLY is formed by the ORIGINAL embryonic COMMON atrium | Auricles |
Specifically, why is the sinuatrial fold important? | Shifts opening of sinu venosus to right side of common atrium |
What specific structure(s) is/are derived from the INFERIOR part of the right venous valve of the sinu-atrial orifice? | valve of inferior vena cava, valve of coronary sinus |
What embryonic structures take part in the formation of the membranous interventricular septum? | Right conal ridge, left conal ridge, posterior (inferior) endocardial cushion |
Defects contributing to the Tetralogy of Fallot (circle all that apply): a) pulmonary stenosis, b) atrial septal defect, c) ventricular septal defect, d) hypertrophy of left ventricle | a. and c. |
Discuss in detail the formation of the pulmonary trunk and ascending aorta. | truncus swellings in truncus arteriosus, twists to form aorticopulmonary septum |
ostium secondum forms within this embryonic structure | septum primum |
Forms the smooth walled part of the right atrium | Right horn of sinus venosus |
Name given to the smooth walled part of the left atrium | Principal cavity |