Krogan

Krogan are a battlelusting race of reptile like warriors introduced in Mass Effect. The most well known of the Krogan are Urdnot Wrex and Grunt (Urdnot Grunt if you complete his loyalty mission on Tuchanka)

Krogan Physiology
Krogans are arguably one of the toughest organic races ever encountered in Mass Effect 1 and 2. Their bodies are literally a powerhouse of organic strength, durability and adaptibility. With most krogans, their body possesses primaries, secondaries and even tertiary organs and backups, even going so far as to have a redundant nervous system. Due to this they can live for centuries, it can only be spectulated as to how long exactly, though an asari on Illium comments that "Krogans have long lives" and that "It isn't like being with a human where you can stick it out for a century for them to die... no offense."

Capable of cellular regeneration unseen in most races, Krogan are resilient warriors who love the thrill and glory of a messy up close and personal battle and go to lengths to try and find it, with most krogan off world of Tuchanka being mercenaries and bounty hunters. Due to their physiology Krogan are also popular bodyguards and shock troops, with Saren Arterius having gone to lengths to try and breed a army of Krogan for use by Sovreign (Or Nazara as it is known as by the geth) on Virmire, only for the breeding facility to be destroyed by a converted mass effect drive core that had been hastily made into a crude thermo-nuclear weapon.

Though Krogan used to have an almost ungodly birthrate, which contributed to most krogan wars, they were practically sterilized by the salarians during the closing days of the Krogan Rebellions after the salarians created the genophage and the turian armies deployed it. The genophage is often considered, and incorrectly at that, by most to be a sterility plague when in fact it is a disease that simply alters krogan hormonal balances to ensure that krogan birthrates stay at the ratio of 1:1000. The salarian scientist, Prof. Mordin Solus described this as being the perfect ratio for krogans as their birthrates before hand were absolutely horrendous, neither allowing their population to rise unchecked or fall to eventual extinction.

Despite this, krogans are still extremely adaptable, even so far as to work around the genophage for a while being a new modified version of the genophage was reintroduced to them to keep them under check. To prove this, all krogan undergo various rites and rituals, the only one seen in game was the Rite of Passage on Tuchanka. During the Rite, the aspiring krogan and his krantt must survive waves of various beasts, including varren, klixen and even a Thresher Maw.

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