The Digestive system The digestive system is a series of organs in a long, twisting tube going from the mouth to the arse. Digestion is when food and drink are broken down into their smallest parts so the body can use them to provide energy to the body though the blood. Stomach acid, pancreas juices and saliva help the body to break down and absorb food. The organs in the digestive system are the Mouth, esophagus, stomach, small intestine, large intestine and the rectum. On average it takes 1 to 3 hours to digest red meat. http://www.google.com.au/imgres?q=human+digestive+system&um=1&hl=en&safe=off&sa=G&rls=com.microsoft:en-au:IE-Address&rlz=1I7ADFA_enAU459&biw=1904&bih=926&tbm=isch&tbnid=4QiPnHiBXelK_M:&imgrefurl=http://www.healthcentral.com/acid-reflux/h/list-of-all-of-the-major-organs-of-the-human-digestive-system.html&docid=Fcwf-T4KnWqoVM&imgurl=http://www.healthcentral.com/common/images/8/8710_7138_5.jpg&w=400&h=320&ei=YSYaUO7pJ_DPmAWO3oFI&zoom=1&iact=hc&vpx=1421&vpy=296&dur=118&hovh=201&hovw=251&tx=87&ty=84&sig=109614037805813346413&page=1&tbnh=115&tbnw=144&start=0&ndsp=64&ved=1t:429,r:25,s:0,i:215 http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/#top www.kinginstitute.org/attachments/article/166/hnu-06-2008.pdf The respiratory system
The respiratory system is made up of organs in your body that help you to breathe. The lungs are the main organs of the respiratory system. In the lungs oxygen is taken into the body and carbon dioxide is breathed out. The red blood cells get the oxygen in the lungs and carry it into body. Then we breathe the carbon dioxide out when we exhale. Breathing starts with a muscle at the bottom of the lungs called the diaphragm. When you breathe in, the diaphragm contracts. It then gives a larger space for the lungs and the air goes into the lungs. When you breathe out, the diaphragm expands reducing the amount of space for the lungs and pushes the air out. http://www.google.com.au/imgres?q=respiratory+system&um=1&hl=en&safe=off&sa=X&rls=com.microsoft:en-au:IE-Address&rlz=1I7ADFA_enAU459&biw=1904&bih=926&tbm=isch&tbnid=T3E-aFyGo--PcM:&imgrefurl=.com http://www.medicalook.com/human_anatomy/systems/Respiratory_Systemhtml&docid=pfdGQWC0BAeGBM&imgurl=http://www.medicalook.com/systems_images/respiratory_system_large.gif&w=1000&h=757&ei=jSkaUMbcLInzmAX9t4CoAQ&zoom=1 http://hes.ucfsd.org/gclaypo/repiratorysys.html The circulatory system The circulatory system passes nutrients all-around the body to help fight diseases, body temperature and pH, The main components of the circulatory system are the heart, blood, and blood vessels It also has the pulmonary circulation, which goes through the lungs where blood is oxygenated; An average adult contains 4.7 to 5.7 litres of blood, which has plasma, red blood cells, white blood cells, and platelets. Oxygen depleted blood is pumped away from the heart, to the lungs and returned, oxygenated, to the heart. The digestive system also works with the circulatory system to provide the nutrients the system needs to keep the heart pumping.