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Name:________________ SNC2P: Organs in Animals Read pp. 54-58 to answer the following questions in complete sentences. 1. What is an organ? An organ is an organized group of tissues that performs a specific function 2. What is the largest organ in your body? List 4 important functions of this organ. Skin is the largest organ in the human body. - Barrier against disease, insulates, releases heat, excretes wastes, make vitamin D 3a. Where is epidermis tissue found and what is it made of? The epidermis is the outer protective layer & made of epithelial tissue 3b. Where is dermis tissue found and what is it made of? Inner layer of skin made up of connective tissue, nervous tissue and muscle tissue 4. What is the basic function of the lungs? How much does one lung weigh? Respiration - take oxygen (O2) in and get rid of carbon dioxide (CO2). 1 Kg - The weight of one lung 5. List the two types of tissue that are found in the human lung. Connective & epithelial tissue 6. Indicate the function of the following parts of the human respiratory system: Part Function trachea Flexible tube -> carries the air toward lungs bronchus/bronchial tubes Smaller air passageways branching from the trachea alveoli Sacs at the end of bronchioles where the transfer of oxygen into the capillaries occurs. Also, where carbon dioxide is picked up from the capillaries capillaries The vessels where gas exchange occurs 7. Label the diagram below using page 57 fig 2.5 nasal passage mouth trachea bronchus bronchioles lung alveoli with capillaries 8. What is the basic function of the human heart? How big is your heart (compare it to a another part of your body) Supplies blood to all parts of the body. A typical person's heart is the size of their fist. 9a) How many chambers does the heart have? Four (4) 9b. Where does the left side of the heart pump blood? (look at figure 2.6) The left side of your heart pumps oxygenated blood to the rest of your body 9c) Where does the right side of the heart pump blood? (look at figure 2.6) The right side of your heart pumps de-oxygenated blood to the lungs to pick up O2 and expel CO2. 10. Use p. 57 fig 2.6 to label the diagram below. Use a ruler to neatly label the following. aorta, right atrium, left atrium, right ventricle, left ventricle, path from body Aorta To Body To Lung Right Atrium Left Atrium Left Ventricle Right Ventricle 11. Describe the functions of the following terms as they relate to the human digestive system Part Function Esophagus Brings food to Stomach Peristalsis Rythmic constriction & relaxation of the smooth muscle that lines the esophagus stomach Contains all four tissues, churns food & mixes chemicals to breakdown (digest) food small and large intestine More chemical digestion and water are removed rectum Stores solid wastes until released by through the anus 12. Label the following parts of the digestive system Esophagus Stomach Intestines rectum Esophagus Stomach Intestines Rectum