Primordial Heart Tube Flashcards
Rotates cardiogenic area and moves it centrally and caudally
Cranial Folding
At what day would the sinus venosus contract and pushes blood cranially?
day 22
Angioblastic cords form _______
Endocardial heart tubes
Separates myocardium and heart tube endothelium
Cardiac Jelly
When?
Looping of Heart tube
4th to 5th week
Divides the atrium from left and right halves
Septum primum
Apoptosis induced perforations appear in the center of septum primum to produce ______
Foramen secundum
Incomplete partition of the atrium by the septum secundum forms _______
Foramen ovale
Results from the growth and dilation of ventricles and fusing of medial walls
IV SEPTUM
Connects the valve leaflets to the ventricular walls
Chordae tendinae
Where cardiac conduction in the adult heart begins
Sinoatrial node / SA Node
First to become electrically active and “pacemaker”
Cardiomyocytes
Slows the transmission of an impulse between the atria and ventricles
AV node
Regulates cardiomyogenesis from the blastula to gastula stages as well as the morphological changes that occur later in development such as looping and septation
Signaling Mechanisms
Inhibits the formation of cardiogenic mesoderm
Ectodermal Signals