For a science project focusing on the digestive system, kids can make a model stomach and a model small intestine. They can also make a wide array of digestive components, but the stomach and small intestine are the easiest and most enjoyable for children.Know More
Children can use a plastic sandwich bag, crackers of any type and orange juice to recreate a stomach environment. To create the effect that chewing has on crackers, students can crumble them up with their hands. The crackers will then be placed into the plastic bag that is representing the stomach. Pouring orange juice into the plastic bag will be the symbol for the stomach acid. Students can note how the orange juice made the cracker pieces soft. By squeezing the bag with their hands, students can replicate the stomach contractions that are in the digestive system. This project results in the crackers and orange juice mixture becoming completely liquid, as it would in the stomach.
To create a science project for the small intestine, students will need one leg of pantyhose, 2 cups of cooked oatmeal, scissors and something to cover up the work surface. An adult should cut the pantyhose so that there is a hole in each end. The student can then pour the two cups of oatmeal into the pantyhose and observe how it flows slowly through the "intestine." By squeezing the pantyhose, the student can recreate the effect of the small intestine contractions which will cause the oatmeal to flow through the pantyhose more quickly.Learn more in Biology
Cnidarians have a digestive system with only one opening through which both digested and undigested material passes. This type of system is called a gastrovascular cavity. Cnidarians use their stinging organelles to stun and kill their prey. Once captured, the food is passed into the opening of the gastrovascular cavity.Full Answer >
Assimilation in the digestive system is the process by which nutrients from foods are taken into the cells of the body after the food has been digested and absorbed, according to IvyRose Holistic. There are four basic stages of the digestive system process.Full Answer >
Food begins its journey through the digestive system in the mouth, before being pushed by a series of involuntary muscle contractions through the esophagus, then the stomach, and then the small and large intestines. The digestive system is essentially a series of long, hollow organs lined with muscles that contract in a rhythmic pattern, known as peristalsis, to keep food moving in the correct direction.Full Answer >
A scientific model is a conceptual, mathematical or physical representation of a real-world phenomenon. A model is generally constructed for an object or process when it is at least partially understood, but difficult to observe directly. Examples include sticks and balls representing molecules, mathematical models of planetary movements or conceptual principles like the ideal gas law. Because of the infinite variations actually found in nature, all but the simplest and most vague models are imperfect representations of real-world phenomena.Full Answer >