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Body Systems Body Systems • Circulatory System • Muscular System • Respiratory System • Nervous System • Skeletal System • Digestive and Excretory Systems The Circulatory System The Circulatory System • The circulatory system consists of the heart, arteries, veins and capillaries, and the blood. All of the other systems in the body rely on the circulatory system, except for the skeletal system. What is the Circulatory System? • The circulatory system carries blood throughout the body. The heart is the main control of the circulatory system. Without the heart, we would die. If the blood doesn’t go throughout the body, the brain doesn’t get the blood to function properly. What Blood Does The blood transports oxygen, nutrients, wastes, and carbon dioxide throughout the body. When you breath oxygen, the oxygen goes down your trachea, which splits up into smaller tubes that end in tiny air sacs called alveoli. Since the walls of alveoli are only one cell thick, oxygen can diffuse through the walls into the capillaries. The capillaries get blood from the pulmonary arteries and transport the oxygen to the rest of the body through the blood. The capillaries also transport nutrients, carbon dioxide, and wastes to and from the body. Capillaries The capillaries get blood from the pulmonary arteries and transport the oxygen to the rest of the body through the blood. The capillaries also transport nutrients, carbon dioxide, and wastes to and from the body. Credits Harshita Rallabhandi Jeffrey Falkenstein Bibliography Richmond, Julius B. Et al. You and Your Health. Glenview, Illinois Scott, Foresman 1981, 1977. Frank, Marjorie Slavick Et al, Harcourt Science California Edition HOW YOUR RESPIRATORY SYSTEM WORKS FACTS ABOUT YOUR LUNGS LUNGS Your body needs lots of oxygen to survive. First air goes down the trachea, also known as your windpipe. Then the air goes into branch-like tubes in your lungs called bronchi. As the air goes into bronchi the air goes through smaller and smaller tubes. At the end of the smallest tubes there are little air sacs called alveoli. MORE FACTS ABOUT LUNGS • You and your systems need oxygen to keep running. The respiratory system is what gets the oxygen. When you breathe, warm air goes down down your trachea and into your lungs. The trachea connects to bronchi, which divides into smaller tubes. Bibliography Jones, Robert M. Science. Orlando:Harcourt, 2000. Credits Produced by: Created by: AJ Macabasco AJ Macabasco Steven Rodriguez Steven Rodriguez The Skeletal System The skeletal system works when joints attach bones to each other and to muscles, ligaments hold the skeleton together, and tendons attach bones to muscles. What Does the Skeletal System Do? The Skeletal System controls the body movement along with the muscles. The hinge joints allow you to bend and straighten your arms and legs. What allows the circular motion is the ball-and-socket joint. For example:your hips and your shoulders are balland-socket joints. The Bones of Your Skeletal System Are……. The skull, clavicle, sternum, ribs, humerus, spine, pelvis, femur, patella, fibula, tibia, phalanges (fingers and toes), radius, ulna. Muscular System Muscles help your body move. Without them you wouldn’t be able to do anything. The more weight you put on a muscle, the bigger and stronger it gets. THE IMPORTANCE OF MUSCLES • Muscles are one of the most important body parts. You couldn’t hand shake without them. Muscular System Created by David Contreras and Mitchell Ford Produced by Mitchell Ford and David Contreras Foresman, Scott. You and Your Health. Illinois: Scott Foresman and company, 1977. The Nervous System The nervous system consists of two parts: the central nervous system and the peripheral nervous system. The Central Nervous System The central nervous system decodes signals it accepts from nerves and decides what reply is needed. Signals sent by the brain travel through nerves and conduct all of the body’s muscles. The Peripheral Nervous System The peripheral nervous system consists of sensory organs, like the eyes and ears,and body nerves. Nerves have bundles of cells called neurons, which are specialized cells that can receive signals and convey them to other neurons. Bibliography Richmond, Julius B. & Pounds, Elenore T. You and Your Health. Glenview, Illinois.Scott Foresman & Company,1977. Frank, Marjorie S.-et al. Harcourt Science: CA Edition. San Diego, California. Harcourt School Publishers, 2000. Credits Created by Produced by Lauren Creiman Karissa Martindale Lauren Creiman Karissa Martindale The Digestive and the Excretory Systems You couldn’t live without them! The Digestive System • The digestive system is a system in your body that lets you eat. • It also produces the nutrients in your cells need to produce energy. The Excretory System • The wastes of the body are taken out of the body in the excretory system. Credits • Produced By • Jamil Sabbagh and Scott Okamura • Created By • Scott Okamura and Jamil Sabbagh Bibliography Frank, Marjorie S.-et al. Harcourt Science :CA Edition. San Diego: Harcourt School Publishers,2000.