Question

what is the main function of the cardiovascular system? building immunity toward diseases transporting bacteria in and out of the body transporting oxygen, nutrients, and waste through the body signaling the body to react to stimulants from the environment around

Explanation:

The cardiovascular system, which includes the heart and blood - vessels, is mainly responsible for transporting oxygen, nutrients, and waste throughout the body. Immunity is mainly related to the immune system, transporting bacteria is not its main function, and signaling the body to react to environmental stimuli is more related to the nervous system.

Answer:

transporting oxygen, nutrients, and waste through the body