Body Systems and Organization

Fill in the blanks Cellsare the smallest units of life. All living things are made up of them. A group of cells is called a tissue . Groups of these then become organs . When we have a number of organs together that do similar jobs, we have an organ system . When the organ systems are all working together we have an organism . Match the body system to it's main function. Respiratory system Bring oxygen in and get carbon dioxide out. Circulatory system Pump blood around the body Digestive system Extract nutrients from the food we eat. Excretory system Remove wastes Skeletal system Protect our body Immune system Protect us from disease Nervous system Send messages around the body Which body system produces hormones? Endocrine Nervous Digestive Circulatory Which system allows for movement? Digestive Nervous Muscular Immune Which system involves detecting changes and reacting to those changes? Nervous Reproductive Circulatory Endocrine Which system has a major role in gas exchange? Respiratory Circulatory Digestive Nervous Put the following words in order from smallest to biggest on both sides. Organization Cells tissues organs organ system organism Examples neuron central nervous system nerves spinal cord dog Organ to Organ System Matching Match the organ with its organ system. Heart Circulatory Brain Nervous Small Intesting Digestive Kidneys Excretory Bicep Muscular Cranium Skeletal Lungs Respiratory Thyroid Endocrine White Blood Cells Immune Explain how the two systems shown below might work together to keep a human alive.