Exam & Evaluation (Animated Cardiac Development)
Questions: Please respond to following statements.
Since the ends of the primitive cardiac tube are_____, as it lengthens, it is forced to bulge and twist inside the pericardial sac.
Approximately how many days after conception does the primative tube begin to pulsate?
By day 24 the tube is propelling fluids.
Stage 10 at the Visible Embryo site, states that; about the same time that the primitive heart begins to pulsate, aggregations of cells which will form the eyes and ears become visible.
The division of the single chambered pump into atria and ventricles begins with growth of the________.
The thick muscular wall dividing the ventricles is called?
The large opening in the ventricular septum is called the ____________.
By about day 33 the atrial septum begins to divide the atrium. What is another name for this structure?
At the same time the atrium starts to divide, what other structures are developing?
nostrils and hand plates
The interventricular foramen is usually completely closed by what week?
What closes the foramen primum, and reduces the flow of blood from the right to left atrium.
As the foramen primum closes it restricts oxygenated blood flow to the left atrium. What is the second opening that forms in the atrial septum called. It allows oxygenated blood to continue flowing into the left atrium?
The incomplete overlap between the septum secundum and foramen secundum leaves an opening called the________. This opening allows one-way passage of blood from the right to the left atrium. (FILL IN THE BLANK)
Separation of the arterial from the venous system is completed when the _______________is closed.
After 8 weeks of development, the embryo can be called a/an _________. (FILL IN THE BLANK)
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