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BODY WORKS
Act 14,15,17,18
Question | Answer |
---|---|
The total amount of area that is exposed on the outside of an object | Surface Area |
To physically break down food into smaller particles (mainly by chewing) | Mechanical Breakdown |
Chemicals in saliva and in the stomach/intestines break down food particles into their parts. | Chemical Breakdown |
Gradually taking in of a substance, for example the villi in the small intestine pull in the nutrients so that they can be transported by the blood | Absorption |
a chemical that helps us identify the presence of something (i.e. BTB changes color when exposed to CO2.) | Indicator |
Breaks down food into the nutrients to be absorbed into the blood. | Digestive System |
a group of organs working together for a specific function/job | Organ System |
The tiny parts of food that the body uses to survive and grow. | Nutrients |
Body system responsible for breathing--Oxygen in and Carbon Dioxide out | Respiratory System |
also called the cardiovascular system, moves the blood around the body | Circulatory system |
The small intestine is designed with tiny structures that increase the surface area to increase nutrient absorption. Name these structures. | Villi |
Which body system is the transport system in our bodies that delivers oxygen and nutrients to our cells? | Circulatory system |
How can we increase the amount of surface area exposed of a substance? | Break it into smaller and smaller pieces. |
When you added vinegar to the crushed tablet, what was different about the reaction compared to the whole tablet | It was quicker |
What is the structure in the lungs that increases the surface area so that the 0xygen exchange for Carbon Dioxide happens quicker? | Aveoli |
BTB was an indicator. Why did it turn yellow ( or green) when mixed with the blue? | Extra Carbon Dioxide in the water. |
Why is chewing your food important? | Creates more surface area so that the stomach acid can break down food faster. |
What other organs secrets chemicals to help break down the food in the small intestine? | Pancreas |
Why are the lungs made of many tiny air sacs, instead of being just one big balloon type structure.? | to increase surface area so that the gas exchange, Oxygen into the blood, and carbon dioxide out of the blood can happen faster. |