Years ago when we studied anatomy, my children made a life-sized poster of each of the systems of the body, one by one as we studied them. The child would lie down on the butcher paper, and we would trace the real body of the child. We usually covered one system a week or one system for two weeks. We colored each system a different color so that we could distinguish which was which. It was a fun project that the children enjoyed.
Recently when I went to the state fair with my children, we saw a three-dimensional anatomy poster of two of the systems of the body: the circulatory and digestive systems. The intestine was made of panty-hose, and the stomach was a clear plastic bag with cut-out pictures of food in it. (I like humor in a project occasionally because it adds personality to the artwork.) A drinking straw was the esophagus. The heart, lungs, and trachea were made of felt, and it looked like the child stuffed it and sewed it around the edges. The brain was like the bottom part of an old-fashioned mop. It was really fun to look at!