What is the respiratory system? The bodys breathing system The bodys system of nerves The bodys food-processing system The bodys blood-transporting system Air can enter the body and travel to the lungs ... through the mouth and the nose through the oesophagus and gullet through the windpipe and the pores through the nose and the nervous system What is the purpose of the little hairs inside the nose? To fight disease. They serve no purpose. To keep dust out of the lungs. To tickle the nose and cause sneezes. What is another name for the windpipe? Lungs Larynx Trachea Oesophagus What happens to the windpipe, or trachea, before it reaches the lungs? It branches in two directions. It branches in three directions. It vibrates and creates sounds. It closes up so that no oxygen can escape. What important activity takes place in the lungs? Food is digested. Liquid waste is filtered from the blood. Oxygen is exchanged for carbon dioxide. The trachea is exchanged for the larynx. Oxygen moves from the lungs into the bloodstream through ... nerve fibres a large artery in the heart small blood vessels in the lungs a tube in the lungs called the jugular vein When we breathe in, we inhale many gases, including oxygen. What happens to the gases that the body cant use? They are exhaled. They are changed into oxygen by the lungs. They circulate through the body and are disposed of later. They are absorbed into the digestive system and used to create energy. Which organ is made up of air-carrying tubes and tiny sacs? The brain The lungs The stomach The diaphragm What body structure protects the lungs from outside harm? Cartilage Tiny sacs The rib cage The diaphragm To go on living, the bodys cells need food, water, chemicals, and ... helium oxygen vegetables carbon dioxide
Posted on: Fri, 08 Aug 2014 17:03:52 +0000
Trending Topics
Recently Viewed Topics
© 2015