Complete the following statements about the functions of the digestive system. The starts an involuntary swallowing action when it senses food. The squeezes food down the digestive tract by an involuntary synchronized muscle movement called . Food that has been digested in the is processed into a thick liquid called .

The pharynx starts an involuntary swallowing action when it senses food.

The esophagus squeezes food down the

digestive tract by an involuntary synchronized muscle movement called peristalsis

Food that has been digested in the stomach

is processed into a thick liquid called chyme

Explanation:

I Did It On Edge :)

As given below.

Explanation:

Yes, the scientist should be concerned about the acid rain precipitation and thus its a concern of the new environmentalists as acidic rain is caused by the compounds of sulfur and nitrogen and gases released in the air. This is due to the dangerous composition of gases that develops due to industrial clustering and regarded as highly hazardous for plant and animal life. The reproduction rate of birds and forest ecosystem is affected by the presence of the acid precipitation as this rain has a lower pH and can cause sens of burning and a feeling of irritation. Even the soils can be damaged by this rain, as microbes are unable to tolerate the hazardous acids and high concentration leads the ground vulnerable to erosion agents like wind and water.