2. Respiratory and Excretory Systems

3. Vocabulary Alveoli – Air Sacs that make up the lungs, where gas exchange occurs Capillary – tiny blood vessels that carry materials and exchange them with the cells throughout the body Waste – materials not needed by the body and can be toxic if not gotten rid of

4. Respiratory System: Function: gas exchange, bring _______to the blood and remove ________________ from the blood Organs: 1. Nose: _______, ______, and moistens air 2. Trachea: protected by ________, contains the vocal cords Epiglottis: covers trachea when swallowing food 3. Bronchi: two branches that lead to the _______ Oxygen Carbon Dioxide FiltersWarms Cartilage Lungs

5. Respiratory System: 4. Lungs: made up of ______ where gas exchange occurs ( oxygen _______ and carbon dioxide _________ the blood) 5. Diaphragm: muscle that controls _______________ Alveoli EntersLeaves Breathing

6. Diagrams: Respiratory and Circulatory systems work together by the blood bringing carbon dioxide to the lungs to be exhaled, and the lungs taking in oxygen and giving it to the blood to be transported throughout the body.

7. Emphysema: a disease that reduces the number and elasticity of ___________ Alveoli

9. Nonsmoker Smoker

10. Excretory System: Function: remove ____________ Organs: 1. Lungs: removes ____________ 2. Large Intestine: removes _______waste from the digestive system 3. Skin: removes ________ and heat 4. Liver: removes excess _________ acids and worn out _____ 5. Kidneys: produce urine to remove ________, salts and nitrogen wastes Waste Carbon Dioxide Solid Water Amino RBC (Red Blood Cells) Water

11. Lungs are a respiratory organ because they take in oxygen and an excretory organ because they get rid of carbon dioxide Human Kidney

12. Diagrams: Lungs Large Intestine Skin Liver Kidney Gets rid of CO 2 (Gas)Gets rid of Solid Waste Gets rid of Water and Heat Gets rid of Amino Acids and RBCs Gets rid of Urine (Liquid Waste) Brings blood to the kidneys Filters/Cleans Blood Muscular Sac that stores Urine Brings filtered blood back to the heart Transports Urine (Liquid Waste) produced by the kidneys to the bladder Urethra Eliminates Urine from the body

13. Describe the exchange that occurs with the circulatory system and the body cells. What would happen if your excretory system didn’t work and why? The circulatory system delivers and gives the body cells oxygen and nutrients as it takes away carbon dioxide and other wastes and delivers them to the excretory organs Your cells would start to die because waste is toxic

14. Review - Electricity Electricity is due to moving charges Like charges repel (two positives or two negatives) Opposite charges attract (Positive and negative) Electricity can travel through conductors (metals) Electricity can not travel through insulators (plastic, rubber, glass)