Which organ produces insulin and regulates blood sugar levels?

What is the chemical formula for sulfuric acid?

According to the law of conservation of energy, what happens to the total energy in a closed system?

What is the phenomenon where a vibrating system or external force causes another system to oscillate with greater amplitude at a specific frequency?

Which blood vessels carry blood away from the heart?

What is the name of the spacecraft that successfully landed the rover "Zhurong" on Mars, making China the second country to land and operate a rover on the Red Planet?

According to Newton's third law of motion, if object A exerts a force on object B, what is the reaction?

What is the main function of the circulatory system?

In the human body, what type of joint is the elbow joint?

What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?