Adam - Immortal vs Mortal Body

Fall of Adam (Bible Dictionary)

The process by which mankind became mortal on this earth.  The event is recorded in Gen. 2, 3, 4; and Moses 3, 4.  The fall of Adam is one of the most important occurrences in the history of man.  Before the fall, Adam and Eve had physical bodies but no blood.  There were no sin, no death, and no children among any of the earthly creations.  With the eating of the "forbidden fruit," Adam and Eve became mortal, sin entered, blood formed in their bodies, and death became a part of life.  Adam became the "first flesh" upon the earth (Moses 3:7), meaning that he and Eve were the first to become mortal.  After Adam fell, the whole creation fell and became mortal.  Adam's fall brought both physical and spiritual death into the world upon all mankind (Hel. 14:16–17).

   The fall was no surprise to the Lord.  It was a necessary step in the progress of man, and provisions for a Savior had been made even before the fall had occurred.  Jesus Christ came to atone for the fall of Adam and also for man's individual sins.

 Latter-day revelation supports the biblical account of the fall, showing that it was a historical event that literally occurred in the history of man.  Many points in latter-day revelation are also clarified that are not discernible from the Bible.  Among other things it makes clear that the fall is a blessing, and that Adam and Eve should be honored in their station as the first parents of the earth.  Significant references are 2 Ne. 2:15–26; 9:6–21; Mosiah 3:11–16; Alma 22:12–14; 42:2–15; D&C 29:34–44; Moses 5:9–13.  See also Flesh.

The Fall of Man - Robert J. Matthews

("Man Adam" Robert L. Millet, Joseph Fielding McConkie)

There was no blood in the bodies of Adam and Eve in the garden. That there was no blood in the bodies of Adam and Eve before the Fall, and that blood came as a result of the Fall, is not categorically stated in any one passage of scripture, but leading doctrinal teachers such as President Joseph Fielding Smith and Elder Bruce R. McConkie have declared that such was the case. 7 This conclusion is scripturally based and takes into account that blood is the mortal life of the body (see Gen. 9:2-6; Lev. 17:10-15).
 

A further point supporting the conclusion that Adam and Eve had no blood in their premortal, non-death bodies is that we are assured by the Prophet Joseph Smith that resurrected beings do not have blood but possess bodies of flesh and bones "having spirit in their bodies, and not blood." The Prophet also said, "When our flesh is quickened by the Spirit, there will be no blood in this tabernacle." In speaking of the place where God dwells, the Prophet said, "Flesh and blood cannot go there; but flesh and bones, quickened by the Spirit of God, can."  (See also 1 Cor. 15:50.)

This much we know about blood: (a) it is a vital part of our mortal lives and is basic to the reproductive process of mortals; (b) it was the agent of redemption in the atonement of Jesus Christ, he shedding his blood to redeem all people from the effects of the Fall and, upon the condition of repentance, from their personal sins; and (c) blood will not exist in the bodies of resurrected beings. With these known facts it becomes evident that blood is the badge of mortality, and since it will not exist in the deathless bodies of Adam, Eve, and their posterity in the resurrection, it is therefore reasonable to conclude that blood did not exist in the deathless, premortal bodies of Adam and Eve prior to the Fall.

Doctrines of Salvation - Joseph Fielding Smith

NATURE OF A SPIRITUAL BODY. Now what is a spiritual body? It is one that is quickened by spirit and not by blood. Our Father in heaven and our Savior and all those who have passed through the resurrection have physical bodies of flesh and bones, but their bodies are quickened by spirit and not by blood, hence they are spiritual bodies and not blood bodies. The immortal body is quickened by spirit, but the mortal body is quickened by blood. The Lord said to Noah, that blood is the life of the body in this mortal sphere. In latter-day revelation we have the following:

"For notwithstanding they die, they also shall rise again, a spiritual body. They who are of a celestial spirit shall receive the same body which was a natural body [i.e, a mortal body]; even ye shall receive your bodies, and your glory shall be that glory by which your bodies are quickened." 

From this we have the Lord's endorsement of a spiritual body being the body which has ceased to be a blood body. Now when Adam was in the Garden of Eden, he was not subject to death. There was no blood in his body and he could have remained there forever. This is true of all the other creations. This statement may not be very pleasing to our evolutionists, but it is true.

ADAM: FIRST MAN AND FIRST FLESH. After the fall, which came by a transgression of the law under which Adam was living, the forbidden fruit had the power to create blood and change his nature and mortality took the place of immortality, and all things, partaking of the change, became mortal. Now I repeat, the account in Genesis one and two, is the account of the physical creation of the earth and all upon it, but the creation was not subject to mortal law until after the fall. It was, therefore, a spiritual creation and so remained until the fall when it became temporal, or mortal.

There was no living thing upon the earth until it was prepared for living life. The Pearl of Great Price does not say that man was the first living thing on the earth, but that he was the first flesh and the first man also. He became the first mortal flesh when he fell. By flesh is meant mortality, and Adam was the first mortal on the earth; but animals and other forms of life were placed on earth first, and he was not on the earth until everything was prepared for him. Since Adam was the first man on the earth, that does away with the false notion that there were pre-Adamites. 

“The Law and the Light” - Elder Boyd K. Packer
After the transformation caused by the Fall, bodies of flesh and bone and blood (unlike our spirit bodies), would not endure forever. Somehow the ingredient blood carried with it a limit to life. It was as though a clock were set and a time given. Thereafter, all living things moved inexorably toward mortal or temporal death. Temporal, I repeat, means temporary.