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 .

not too sure on this one thinking tyo organize the division of africa

mexico south america

explanation:

wilsons 14 points

hope i

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.