What Are Social Structures? How Do They Shape Our Society

question 109

Essay

What are social structures? How do they shape our society?

---

Definitions:

Left Atrium

One of the four chambers of the heart, which receives oxygenated blood from the lungs.

Ventricle

One of the two lower chambers of the heart that receive blood from the atria and pump it out to the lungs or the rest of the body.

Cardiac Cycle

The series of events that occur from the beginning of one heartbeat to the beginning of the next, including systole (contraction of the heart muscle) and diastole (relaxation of the heart muscle).

Atrial Repolarization

The part of the cardiac cycle in which the atria return to their resting state by the re-entry of potassium ions into the cells, often masked by ventricular depolarization on an ECG.