11 Because the life of the flesh is in the blood: and I have given it to you, that you may make atonement with it upon the altar for your souls, and the blood may be for an expiation of the soul. 12 Therefore I have said to the children of Israel: No soul of you, nor of the strangers that sojourn among you, shall eat blood. 13 Any man whosoever of the children of Israel, and of the strangers that sojourn among you, if by hunting or fowling, he take a wild beast or a bird, which is lawful to eat, let him pour out its blood, and cover it with earth. 14 For the life of all flesh is in the blood: therefore I said to the children of Israel: You shall not eat the blood of any flesh at all, because the life of the flesh is in the blood, and whosoever eateth it, shall be cut off. 15 The soul that eateth that which died of itself, or has been caught by a beast, whether he be one of your own country or a stranger, shall wash his clothes and himself with water, and shall be defiled until the evening: and in this manner he shall be made clean.
Throughout this entire passage it clearly says that the life of the FLESH is in the blood; however, simply having flesh and blood DOES NOT make something a human. That is why this passage also speaks of the SOUL and the soul is a necessary component of our humanity.
Now let's look at Jeremiah 1:5:
Before I formed thee in the bowels of thy mother, I knew thee: and before thou camest forth out of the womb, I sanctified thee, and made thee a prophet unto the nations.
Here it's very clear that God knew us BEFORE conception and this would indicate that our souls are certainly present at conception and the soul is where our humanity comes from, THIS is the Breath of Life that God breathed into Adam's face.
No, flesh and blood belong to any number of animals. But, the life of the flesh being in the blood, then a fetus at 21 days or beyond (or maybe even sooner) has life according to the link I provided above. It just hasn't been born as yet. This is the key point, IMO.