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