Because the blood coagulates over the cut, and throws out a kind of lymph, which forms an incipient flesh, and excludes the air while the blood-vessels are engaged in repairing the part.
"And God said, Let us make man in our own image, after our likeness; and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing."—Gen. i.
903. Why, since all the substance of the body undergoes change, do we preserve the same features throughout our lives?
Because our substance changes in the minutest atoms; and each separate atom has a life of itself, the maintenance of which preserves the unity and permanence of the whole.
904. Why do moles upon the skin continue permanent, while bruises and wounds disappear?
Because moles are themselves organised formations, and repair themselves just as any other part of the body does. But bruises and wounds are the result of accidental disturbances, which in course of time become removed.