Breath in, Breath out Let's see what happens when you do that Hmm, I wonder what happens if I hold my breath 1..2..3..4..5..6..7..8..9..10 OK, nevermind I was feeling pain My lungs are probably weak(seriously)
Our bodies have cells A group of cells is a tissue A group of tissues is an organ A group of organs make an ORGAN SYSTEM Now, Organ Systems help the body to function In the biology class, we'll learn about different organ systems that help our body to function well chessandprogrammingtopics.blogspot.com