Section 2: human development before birth

This increase in tension and contractions tears the placenta from the uterine wall and pushes it out of the uterus, through the cervix, and out of the birth canal. Placental expulsion, also called the afterbirth, usually occurs within the first hour after delivery.

The Placental Stage. ... This increase in tension and contractions tears the placenta from the uterine wall and pushes it out of the uterus, through the cervix, and out of the birth canal. Placental expulsion, also called the afterbirth, usually occurs within the first hour after delivery.

BTW going to tell the truth Got this off a website and if you put your question in google brings this up and she cheated to... check it if you don't believe me.

Hope This Helps!  Have A Nice Day!!

b - the respond is innate and varies over time.

good luck!

answer: glucoamylase presented optimum activity at temperature of 55â°c, and, in the glycosidic bonds from the non-reducing ends of starch, resulting in the production of glucose. source and type of fermentation can affect the enzyme's properties

credit to kalahira