- The left ventricle is the cardiac chamber responsible for delivering oxygenated blood into systemic circulation.
- After blood is oxygenated in the lungs, it enters the left atrium and then passes into the left ventricle.
- The left ventricle contracts forcefully to pump the oxygen-rich blood through the aorta and into the systemic arteries, supplying all tissues and organs of the body with oxygen and nutrients.

- In contrast, the right atrium and right ventricle deal with deoxygenated blood, receiving it from the systemic circulation and pumping it to the lungs for oxygenation.

- Thus, the key point is that the left ventricle generates the high pressure needed to distribute oxygenated blood throughout the entire body.

Reference: Gray's Anatomy, 42nd Edition, Cardiovascular System, Chapter 10 / Page 250