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NWHSU Mash GA 2 Quiz 1 Embryo Cardiac

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
Created by: AnatomyMash