Answer Key of Revision (Topic 3)
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1 s Science Department Grade 5- Term 2 Name: Date: Section: Answer Key of Revision (Topic 3) Nb Lesson Assessed Skills Test Items 3A 3-1 Identify The Circulatory system with its structures and function. Q2 (a,e), Q4 (1,6,7), Q6, Q8 3B 3-2 Identify Respiratory System with its structures and function. Q2 (b), Q3,Q4 (2,3), Q5 3C 3-3 Identify the Digestive and the Urinary system with their structures and function. Q2(c, d), Q4 (4,5), Q7. 3D 3-1,3-2,3-3 Explain how human body s systems are interrelated Q4 (f) 3E 3-1,3-2,3-3 Define vocabulary words (Veins, arteries, capillary, valves, bronchioles, trachea, alveoli, esophagus) Q1. Page 1
2 Q1. Match the vocabulary words on the left with the appropriate definition on the right. Veins Are where oxygen enters the blood and CO2 leaves the blood. Esophagus Are blood vessels that take blood from the cells to the heart Bronchioles Smallest kind of blood vessel Trachea Are blood vessels that carry blood away from your heart to other parts of the body Valves A tube that carries food from the mouth to the stomach Arteries Two branches called bronchi branch into smaller tubes called Capillary Is a tube that carries air from the larynx to the lungs Alveoli Flaps that act like doors to keep blood flowing in one direction Page 2
3 Q2.Answer the following questions: a. List the components of the blood. WBC, RBC, Platelets and plasma b. What is the role of the mucus and of the trachea? The mucus traps dust and germs. The trachea carries air from the larynx to the lungs. c. What is the main role of bacteria in the digestive system? They are helpful bacteria which help keep out other bacteria that cause disease. They also make vitamins that your body uses. d. What structure above the esophagus prevents food from entering the wrong tube? Epiglottis e. What are the three types of blood vessels? Veins, Arteries, Capillaries f. Explain how the respiratory system and the circulatory system are related. The respiratory system gets the oxygen as far as the tiny air sacs inside your lungs. Then in the Circulatory system, blood picks up the oxygen there and carries it to all your cells-all the way down to your toes. Q3. Put in order of 1 to 5 the steps of the air pathway: 1 Air enters through the nose or mouth 3 Nose traps dust and germs by the help of hair and mucus. 5 To the larynx 4 Air passes from the sinus to the throat 2 Sinus warm and moisture the air Page 3
4 Q4.Read each question and choose the best answer. 1. Which type of blood vessel takes blood from cells back to the heart? a. Vein b. Artery c. Capillary d. Arteriole 2. When you hold your breath, your brain sends a message to the diaphragm and rib muscles telling them to breath. Why is this message sent from the brain? a. Oxygen builds up in the lungs. b. Oxygen builds up in the blood. c. Carbon dioxide builds up in the lungs. d. Carbon dioxide builds up in the blood. 3. Round the wall of each air sac in the lungs is a web of a. Veins b. Valves c. Arteries d. Capillaries e. When food is exposed to stomach fluids 4. Which organs send chemicals to the small intestine to help digest food a. Kidney and liver b. Liver and stomach c. Pancreas and liver d. Pancreas and kidneys 5. The transportation system of the body is the a. Urinary system b. Digestive system c. Respiratory system d. Circulatory system Page 4
5 6. Which of the following will the body make in greater numbers in response to an infection? a. Plasma b. Platelets c. Red blood cells d. White blood cells 7. The difference of blood color (bright red and dark red) is because: a. Bright red blood color carries waste and carbon dioxide while dark red color blood carries oxygen b. Bright red color blood carries oxygen while dark red color blood carries carbon dioxide. Q5. Write beside each picture what happens to the diaphragm as we inhale and as we exhale. When we inhale, Diaphragm moves down When we exhale, Diaphragm moves up Page 5
6 Q6. Fill in the following chart: Heart Right Left Right Atrium Right Ventricle Left Atrium Left Ventricle Page 6
7 Q7.In the below flow diagram, write the pathway of food as it goes into the digestive system Mouth esophagus Stomach Small Intestine Large intestine Page 7
8 Q8.Draw arrows showing the blood flow from the body to the heart then back to body parts. Blood coming from the body Lungs Science Teacher: Mrs. Lama EL Ghali Page 8
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