Heartstrings

I was wearing my heart pendant yesterday: it's an anatomical drawing of the heart. Liam was looking at it.

"So, this is what the heart looks like?"

"Yes."

"What are these tubes?"

"They connect the heart to the rest of the body. They're filled with blood that the heart pumps."

"So the heart is connected with everything in the body?!"

"Yes."

"What about the string between your heart and mine?"