The nutritive substances used in greatest quantities by mammals are carbohydrates.

Production and consumption of carbohydrates is so well regulated that there is a constant blood sugar level; any accidental increase or fall in blood sugar is rapidly compensated.

The production and consumption of glucose, and hence, the blood sugar level, are controlled by a functional endocrine equilibrium.

The constancy of the blood sugar level is maintained by a complex physiological mechanism, a homeostatic mechanism of the same order as those which maintain the body temperature, the blood pressure or the heart rate at normal levels and control many other functions.

Nay, master, said not I as much when I saw the porpoise, how he bounced and tumbled? They say they're half fish, half flesh. A plague on them! They ne'er come but I look to be washed.

My lords, we are vertebrate animals, we are mammalia! My learned friend's manner would be intolerable in Almighty God to a black beetle.