A What do you measure in a ^fossil to determine its age? ^A) Carbon Fourteen ^B) Carbon Twelve ^B A half-life is the time it ^takes a radioactive isotope to^reach stable form. ^A) True B) False ^A ----- binds and supports ^other tissues and is formed ^from the mesoderm. ^A) Connective tissue B) Bone ^B Which structure contains ^the liver, kidneys and spleen?^A) Thorax B) Abdomen ^ ^A Bone cells use calcium ^phosphate and calcium ^carbonate in the process of: ^A) Ossification B) Osmosis ^A Red and white blood cells are ^formed in the _______ of the ^ribs and sternum. ^A) Red Marrow B) Cartilage ^B What type of joint is formed ^at the elbow and knee? ^A) Angular B) Hinge ^ ^B Myofibrils are bundles of ^protein filaments which allow ^_______ to contract. ^A) Tendons B) Muscles ^B Where does the beat of the ^heart originate? ^A) A-V node B) S-A node ^ ^A Tendons differ from ^ligaments in that tendons ^attach muscle to ^A) bone B)muscle ^
