Relier Pairs HUMAN BIOLOGYVersion en ligne LINK NAME AND DEFINITION par Guy Kruse 1 organ system 2 organ 3 cells 4 epithelial tissue 5 hormone 6 muscle tissue 7 tissue 8 nervous tissue 9 connective tissue 10 cardiovascular system Organs that work together to serve a common purpose. Organ system made up of the heart, blood, and blood vessels. Bands of cells that contract and allow movement. Layers of tightly packed cells that line the surfaces of the body. Structure made of two or more tissues that work together. A chemical messenger molecule. Group of cells that are all involved in supporting and binding other tissues of the body; i.e. tendon, cartilage, bone, and blood. Basic unit of structure and function of a living organism; the basic unit of life. Group of nerve cells that sense stimuli and transmit signals; found in brain, spinal cord, and nerves. Group of similar cells working together.