EVERY SINGLE PROTEIN IN YOUR BODY POSSESSES FAULTLESS DESIGN AND VITAL DUTIES

Myoglobin, assigned the duty of transporting oxygen to the muscles, has the capacity to carry one oxygen molecule. But hemoglobin, which transports oxygen to other tissues, has a higher oxygen-carrying capacity. In this way, each kind of tissue receives just the needed amount of oxygen.

The most effective way to show that coincidences have no powers to create is to expound on the proofs of God's existence. Take an example from your own body.

Whether standing up or raising your arms, all your movements are carried out as a result of the action of your muscles. For us to perform these actions, our muscle cells require a continuous supply of oxygen. The duty of transporting oxygen to the muscle cells has been taken up by one of our body's proteins called myoglobin. It very much resembles hemoglobin, another protein whose duty is to transport oxygen in the blood. But the difference between the two is that myoglobin has the capacity to carry only one single oxygen molecule. Due to this feature of myoglobin, flow of oxygen to muscle cells is carried out in a slow, regulated manner.

Consider that hemoglobin, the protein that transports oxygen in the blood, swaps places with the myoglobin that transports oxygen from the lungs to the muscle cells. In such a situation, myoglobin won't be able to carry sufficient oxygen to the body. On the other hand, hemoglobin will carry too much oxygen to muscle tissue and will deposit it suddenly, upsetting the balance of the entire body. But no such thing ever happens; and both proteins are always found in the right place at the right time. As a result, we breathe comfortably and we can move as freely as we please.

Of course, hemoglobin and myoglobin are only two of the proteins found in the human body.  Similarly, other proteins in the body have characteristics that fulfill the body's needs and are produced where they are needed. As these examples show, it's not possible for the human body's perfect design to have come about by chance. The Possessor of this perfect design is God, the Lord of the worlds.

Is He Who creates like him who does not create? So will you not pay heed?
(Qur'an, 16: 17)