This manikin is handmade from durable, unbreakable plastic. Torso and all internal organs are true-to-life in both size and shape. Organs can be removed and replaced very easily. This 27-part torso features a fixed head (skull cap, 6-part brain, eyeball with removable optic nerve), larynx (2-part), 2 lungs, heart (2-part), diaphragm, stomach (2-part), liver with gall bladder, whole intestine system with appendix, front kidney half, half urinary bladder, 4 muscles, and removable gluteus maximus. Torso teaching guide included. Multicolor.