Why is blood the most important component of the cardiovascular system ? please help 3 sentences

The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. It usually beats from 60 to 100 times per minute, but can go much faster when necessary.

The olympics y

Well you see if you dont follow ur parent's expectations or rule you're going to get a beat