Fill in The blanks. The heart is a ___________ in your chest made up of _______Chambers. The heart is protected by the heart act like a ________ pushing blood around the body. This happens because the muscles in the heart regularly contact, squeezing out the blood. blood travels away from the heart in blood vessels called_________ and travels to _________ parts of your body. the blood travels through ___________ to return to the heart. to begin to cycle again.