Why does food need to be digested?
Food needs to be digested so that it can be broken down into smaller molecules, such as nutrients and sugars, which the body's cells can then absorb and use for energy, growth, and repair.
Sample Response: Food needs to be digested so it can be broken down into sugar molecules and nutrients that can be used by the cell to stay alive. What did you include in your response? Check all that apply.Food needs to be digested into a simpler form.Nutrients and sugar molecules are used by the cell to stay alive.
Identify the functions of the labeled parts.
What change needs to be done to correct the diagram showing food moving through the digestive system?
What is peristalsis and where does it occur?
Peristalsis is a series of wave-like muscle contractions that move food through the digestive system. It occurs when muscles above the food contract and push it toward an area of relaxation. This process primarily occurs in the esophagus and the intestines.
Which statements correctly describe the digestive system? Select four options.Food is cut into pieces in the mouth.Food becomes dry in the mouth.Proteins are broken down in the stomach.Carbohydrates are first broken down in the stomach.Food becomes mostly solid in the large intestine.Fat is broken down into smaller droplets in the small intestine.
What do the digestive and excretory systems have in common?
In the excretory system, where does the waste material in the body come from and why does the body need to get rid of these waste materials?
Waste material is produced by the cells of the body during chemical processes. The body needs to remove these materials because they can be toxic or harmful; if they are not eliminated, they can build up and cause illness or damage to organs.
Which processes happen in the kidney? Select three options.production of urinestorage of urineproduction of enzymes that break down foodfiltration of waste material from bloodreabsorption of sugar and water
Sample Response: Peristalsis moves food through the digestive system. When muscles contract, food is pushed to an area of relaxation. The muscles above the food contract further, pushing the food along. It occurs in the esophagus and intestines. What did you include in your response? Check all that apply.Peristalsis moves food through the digestive system. Muscles contract to push food along in the esophagus and intestines.
Sample Response: The cells of the body produce waste materials. The body needs to get rid of these waste materials because they can make us sick. Getting rid of this waste keeps us healthy. What did you include in your response? Check all that apply.Cells produce waste materials.Waste materials can affect the health of the body.
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