I believe they have to do with the cheese making process. They are an ingredient in cheese.
Because the. Rennet. Curdles and it. Makes it easier for them to make cheese and junket and is also not expensive.
Enzymes such as "rennet".
Rennet is added to milk and forms curds and whey. The whey is then tapped off leaving the curds.
Rennet gets added to milk to form curds and whey. It is the curds that go on to form the cheese.
Rennet is used to separate milk into curds and whey. The curds is a solid that is processed into cheese.
Rennet is an enzyme which, when added to milk, produces cheese.
"Curds" - when milk is used for cheesemaking, it is separated into curds (the milk solids) and whey (a watery residue) by the addition of an acid, or rennet (an enzyme). The curds are then processed to become many different forms of cheese, but the cheese which most closely resembles curds in it's unprocessed form is "cottage cheese".
Basically, milk is composed of curds and whey. Adding rennet to milk will separate the milk into liquid (whey) which is waste, and a solid (curds) which goes on to be processed to produce cheese.
When rennet (a complex of enzyme) is added to whole milk, a separation takes place into solid curds, and liquid whey.
Enzymes in cheese are traditionally Rennet. Rennet is made from the stomach lining of cows. If the label says microbial enzymes, the are specifying that the enzyme did NOT come from an animal. Vegetarians look for this when buying cheese.
I think you mean Rennet . Rennet is the lipoprotein that turns milk into curds & whey to separated the milk for cheese making, if you add a small amount of rennet to formula milk it clots quickly forming a lumpy mass & is often used for children with a weak esophageal sphincter muscle that results in projectile vomiting.
You don't separate crream from curd, you separate whey from curd. Cream is skimmed from the top of milk as it sits and the cream floats to the top. Then the milk is used to make curds and whey by adding a curdling agent like rennet. The curds form and the clear liquid they float in is whey. Then you can strain the curds from the whey by pouring them through cheese cloth.