Answer:
HEART
Explanation:
The heart is the only organ to fully develop throughout the first trimester.
What are the functions of Heart ?
- The heart is the major component of the circulatory system; it is principally in charge of distributing nutrients throughout the body by way of blood circulation.
- The heart's status as a crucial organ whose normal function is constantly required is elevated by this ongoing activity.
- The cardiac cycle, which describes the heart's blood-pump cycle, makes sure that blood is delivered evenly throughout the body.
- The process of distributing oxygen starts when oxygen-free blood enters the heart through the right atrium, travels to the right ventricle, enters the lungs to replenish oxygen and expel carbon dioxide, and then moves to the left chambers, where it is ready to be redistributed. The body's blood volume is 5.6 liters, and three cardiac cycles are performed every minute.
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