What Happens When You Eat

Activity 1 How farsighted is the Digestive System submit students cut a piece of yarn according to the following measurements. bequeath students to use distinguishable color yarn to represent different organs. After the yarn has been cut tie-up the pieces together.Esophagus 25 cm Stomach 20 cm Sm all in all gut 700 cm oversized gut 150 cm TOTAL 895 cm Have students domesticate out the percentages or ratios of the spaces of the different organs in the body in order to ease up a numerical idea of the differences a tenacious with the visual data provided by the string. Find out information (from books provided) about how much time sustenance spends in each of these parts of the digestive system as well as which types of diets atomic number 18 confounded down in each part.Activity 2 Digestion Place a sugar cube in a cup of peeing. Place about a spoonful of granulated sugar in the some other cup of water. Observe what happens. Have students disc the time it takes for ea ch type of sugar to dissolve and work out the ratios of theseActivity 3 Carbohydrate Digestion Have the students chew two unsalted soda bats for two minutes without swallowing. Students will be allowed to take check the solution every fifteen seconds and record the solvency of their saliva by counting the number of lumps present in a given amount at these 15-second intervals. Children will be instructed to plot the progression on a graph. Have them write a split explaining the slope of the graphActivity 4 Hands on Digestion Place the hamburger, 3 eyedroppers full of 1M HCl, whizz tablespoon of Digestive Juice A and two tablespoons of Digestive Juice B into a fictile bag. Knead the bad with your hands (simulates the stomach) for about 10-15 minutes, it will have been reduced to mainly liquid and have a definite odor. have students write a summary of the exercise, explaining the action of the hcl on the hamburger and noting any(prenominal) difference between the digested meat an d the digested breadActivity 5 How do Villi aid the Small intestine in Absorption? Compare how 1, 2, 3, and 4 folded paper towels absorb. Dip each paper towel into a cup of water (use the same amount of water in each cup). Record the volume of water left in the cup (using a graduated cylinder). Explain the comparison between the paper towels and the villi. How are these similar and how do they differ? What is the signifi placece, if any, of the similarities and differences? Consider especially the mixture of water and stool and (thinking back to activity 1) describe what might happen if the food passed too fast or too slow through the large intestine.Activity 6 A Digestive System Simulation Procedure Things to make fore of time 1. FOOD TUBE Lay out two check lines of tape on the floor, 3apart and long enough for half the class to stand shoulder to shoulder on one side of the parallel lines. 2. FOOD PARTICLE The food particle consists of M&Ms lay in small zip-lock bags. These ar e placed in wadded newspapers in small paper sacks. Place the small sacks in larger sacks with added newspaper. Place all sacks and add newspaper until the large plastic bag is full. This bag is then taped or fix closed to complete the food particle.Action 1. Peristaltic Movement Put the food particle to be eaten at one end of the food tube and a large trash can at the other. Have students line up on both sides, facing each other, squeeze the food particle the length of the food tube.2. Digestion Label and/or instruct the players. As the food comes to a student they should narrate what they are doing and why.Teeth tear food apart (break plastic bag) Saliva use spray bottles to moisten food particle Stomach tear small bags apart Pancreatic juices spray food Small Intestine absorbs food, find bags of candy and pass to blood (the teacher can play the role of the blood) Large Intestine reabsorbs water, sponge up water on the floor Rectum/Anus puts the waste papers in the trash c anDraw a diagram of the digestive system, labeling its parts and correlating them to the props used in the experiment.