What does the anti-G system help maintain during high G maneuvers?

The anti-G system is specifically designed to help maintain blood circulation during high G maneuvers. When pilots experience high G forces, such as in tight turns or rapid climbs, the increased gravitational forces can cause blood to pool in the lower extremities. This pooling can lead to a decrease in blood flow to the brain, creating a risk of G-induced Loss Of Consciousness (GLOC).

The anti-G system combats this effect by applying pressure to certain areas of the body, typically the legs and abdomen, thereby promoting blood circulation and helping to ensure that sufficient blood reaches the brain. This is essential for pilots to maintain consciousness and the ability to effectively operate the aircraft during high-performance maneuvers.

The other options, while important in the context of overall physiological well-being, are not the primary focus addressed by the anti-G system during high G conditions. Body temperature, oxygen levels, and heart rate can be influenced by various factors, but the specific purpose of the anti-G system is to ensure proper blood circulation under extreme gravitational forces.