1. Human Body Systems

2. Your Body Systems (Part 1) 3. Body Systems (Part 2) 4. Digestive System 5. Parts of the Digestive System 6. The Digestive JourneyDigestion begins in your mouth with action of your teethand tongue (mechanical digestion) and your salivaryglands (chemical digestion).The salivary glands produce enzymes that are mixed withthe food, breaking down the starches. Peristalsis is themuscular action that moves the food through theesophagus and into your stomach after you swallow. 7. Respiratory System 8. The Functions of Your Respiratory SystemYour respiratory system moves oxygen from the outsideenvironment into your body. It also removes carbon dioxide andwater from your body (this image shows all the tiny bronchiolesthat carry air into your alveoli for gas exchange). 9. Parts of the Respiratory System 10. How You Breathe 1: The Diaphragm 11. The Respiratory and CirculatorySystems: Working Together.Workingtogether therespiratory andcirculatorysystems formthe cario-pulmonarysystem, which isan integralconnectionbetween theheart and lungs. 12. Skin 13. Your skin covers your body andprevents the loss of water. Itprotects the body from injuryand infection. The skin alsohelps to regulate bodytemperature, eliminate wastes,gather information about theenvironment, and producevitamin D. The skin isorganized into two main layers,the epidermis and the dermis. 14. Immune SystemYour Immune systemprotects you fromforeign invaders.Special cells react toeach kind of pathogenwith a defensetargeted specifically atthat pathogen.http://www.nobel.se/medicine/laureates/1996/illpres/introduction.html 15. Lymphatic System 16. Muscular System 17. Some Muscles 18. Some Major Voluntary Muscles 19. Circulatory System 20. Your Circulatory System is Responsible for Deliveringand Removing Materials from Every Cell in Your Body 21. Skeletal System 22. Our bones 23. Nervous SystemYour nervous system receives informationabout what is happening both inside andoutside your body. It also directs the way inwhich your body responds to thisinformation. 24. Your Central Nervous System-The Brain and Spinal Cord 25. Your Brain Has VeryComplicated Anatomy All Its Own! 26. Your Senses Are Your Nervous Systems Bridge to the Outside WorldSight, Taste, Touch, Hearing, SmellWeb Sources and Resources: Usborne Science Encyclopedia pgs. 370-375 and Quicklink Images 27. Excretory System 28. Reproductive SystemFemaleMale