D. do all of these...........
Answer and Explanation:
- Ingestion of foods and liquids
- Mechanical processing of food materials and liquids
- Warming the body with heat released from the digestive organs as they process food.
Digestion is the breakdown of food substances by enzymes to simpler compounds that can be absorbed. Digestion begins in the mouth. Once food is ingested in the mouth, it is chewed and broken into small particles suitable for swallowing. Mechanical procesing of food is through the wave-like contractions of the muscular walls of the alimentary canal called peristalsis. Churn and pound food mixing it with digestive enzymes.
After digestion, absorption and assimilation, the final product is oxidized to provide energy to the body.
Yes. It is common for a normal, healthy individual to carry potentially pathogenic organisms in their upper respiratory tract.
The human upper respiratory tract serves as a reservoir for a diverse community of commensals and potential pathogens, such as Haemophilus influenzae, Moraxella catarrhalis,etc. which can occasionally develop into pathogens and cause infectious diseases. Viruses are responsible for the majority of upper respiratory tract infections.
Nasal hairs are used to catch debris. Particles are propelled upward and out of the respiratory tract by cilia on the epithelium of the trachea and bronchi. The respiratory system has a feature that guards against infections.
Therefore, It is common for a normal, healthy individual to carry potentially pathogenic organisms in their upper respiratory tract.
Learn more about upper respiratory tract here;
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Answer:
Resolution.
Explanation:
This is the ability to distinguish between two separate points. if two separate points can not be seen separately, but as a single point, they can not be resolved. Consequently Resolution is the amount of details of an object that that can be seen. Thus the more the higher the resolution of an object the more the detail of the object that can be seen.
For example the maxiimum reso;ution of light microsope is 20nm<u>. Therefore if two objects are placed together more than 20nm apart , they can not be seen(resolved); that is distinguished from one another by light microscope,This is the limImitation of light microcope.</u>
Electron microscope makes use of beam of electrons for focusing, therefore has resolution than light microscope
