  Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.I â¦ t is naturally found exclusively in metazoa, including sponges. [2] In muscle tissue it serves as a major component of endomysium. Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.
The Southern Cassowary - The Most Dangerous Bird on Earth. Sunday, 1 September 2013. Ask a ten year old what the largest bird in the world is and the chances are you will get the right answer â the ostrich. Asked about the second largest and the odds are still very good that they will be able to name the Emu.
1. Box Jellyfh. The top prize for âThe World Most Venomous Animal,â would go to the Box Jellyfh. It has caused at least 5,567 recorded deaths since 1954. Their venom among the most deadly in the world. Itâs toxins attack the heart, nervous system, and skin cells. And the worst part of it that jelly box venom so overpoweringly painful, that human victims go in shock, drown or die of heart failure before even reaching shore.