Orcs

Orcish males're 6-7ft (1.82-2.13m) and 4-600lbs (181.43-272.15kg) and females are only slightly smaller. Remember that this is an average height and weight and can vary by several hundred pounds.

We can determine, then, that their musculature is freakishly dense and efficient with both energy and oxygen. Dark blood generally means low oxygen, and orcish blood is black. While it is possible that it is actually oxygen rich and simply has other compounds that darken it, this is unlikely. Hellscream deadlifted an Iron Star and he was famed for his iron will and cunning, not his demented strength. Therefore it can be postulated that, while strong, he is not considered unusual in this aspect.

Their skin is thicker than humans, though not so much so that we cannot see their veins. Their unnatural toughness and pain tolerance are likely a combination of the facts that they have thick, tough skin, their muscles are as densely packed as a tight bag of rocks, and their warrior culture bringing them up to be mentally robust from birth. In addition, orcs appear to benefit from an increased fight or flight response in the form of ‘battle lust’. This has been known to carry crazed orcs through battle and offer physical benefits such as increased strength and agility. There are significant mental drawbacks, however - they may fail to recognize allies while in the throes of such a reaction, refuse to retreat when it is the wise choice, or advance too far into the fray. As an evolutionary gift it is singular: It offers great benefit in single combat but little in massed.

The raising of orcs as well as their naturally tough physiology contribute to their notable resilience. An orc can suffer extreme injury without complaint and have been known to resist torture for extended periods of time. The lack of oxygen reliance means that suffocating an orc would be a time consuming event and that what would be a fatal bleed in humans would simply make the ground an orc is fighting on somewhat muddier. While they can bleed to death, it would be neither a swift nor simple event, during which they would continue to struggle with quite some force and for quite some time. Loss of limbs will still slow an orc down, but until their ‘battle lust’ fades it is unlikely to wholly stop them. The orcish bone structure is quite thick and thus resistant to concussive force and blunt object trauma.

Based upon history, visible layouts of orcish food, and the structure of their teeth, orcs likely consume primarily meat. They also would need to take in a massive amount of calories just to sustain size. Likely they can digest meat and plant life that would otherwise be considered unusable by humans given their race’s history, where they have chosen and successfully settled, and what their reaction was to the swamplands they entered on their first jaunt into Azeroth.

Orcs age at similar rates to humans, suggesting that there is a similarity in how cell DNA deteriorates over time.