During Which Stage of Prenatal Development Is the Age of Viability

question 216

Multiple Choice

During which stage of prenatal development is the age of viability reached?

• A) zygote stage
• B) germinal stage
• C) embryonic stage
• D) fetal stage

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Definitions:

SA Node

The sinoatrial node, a group of cells in the right atrium of the heart that acts as a natural pacemaker, initiating the heart's electrical impulses.

AV Node

The AV Node, or Atrioventricular Node, is a part of the heart's electrical system that acts as a gatekeeper, controlling the electrical impulses between the atria and ventricles.

Cardiac Conduction

The process by which the heart's electrical system transmits signals, leading to muscle contraction and heartbeats.

Cardiac Control Center

The area of the brain that regulates the rate and strength of heart contractions, primarily located in the medulla oblongata.