The Komodo Dragon - yes dragons are real!
With rotting flesh from it's last meal and over 50 deadly types of bacteria, this dragon takes a mean bite. Within 24 hours of one bite it's victims die from blood poisoning. The komodo dragon will find your dead carcass miles away with it's keen sense of smell. It has survived for millions of years but was only discovered by humans 100 years ago and it's already on the Endangered Species list. Way to go humans, just because it's a dragon doesn't mean you have kill them all! I guess we're afraid because they can run up to 11 miles per hour in short bursts.
Golden Poison Dart Frog
This little guy is no bigger than a paper clip, but wow does it pack a lethal dose of death. One golden frog has enough venom to kill ten humans, yes TEN! The indigenous humans from the pacific coast of the Columbian Rain forest, use their venom for their blowgun darts in hunting prey. The golden frog is 1 of a 100 different species of dart frogs. They are also on the Endangered Species list as well, this time due to deforestation of the rainforest. They on live in a tiny section so to lose their habitat is to lose them. Medical science is still trying to determine use for their poison and may have a new pain killer derived from them! Their only preditor is a snake that has developed an immunity to their poison.
Xenopus Frog (aka African Clawed Frog)
The Zenopus frog is very strange looking and has unique horns on it's eye lids. This frog doesn't have webbed front limbs, or a tongue or visible ears. It also cannot jump but it can swim, so how in the world does this thing survive? Well it uses it's front limbs to shove food into it's mouth. This frog is also not a picker eater. They will eat just about anything living or dead including, worms and fish. Residing in Africa this species has been imported everywhere and was one of the first cloned vertabrete in a labratory. They can adapt their color to their surroundings similar to a chameleon but not quite to that extent. They have also been considered to carry a deadly fungus to amphibians that has been wiping them out, by thickening their skin and constricting their breathing.
The Nervous System
The nervous system includes the Brain, the Spinal Cord, Sensory Organs and all the nerves that connect everything together. This system is broken down into 3 functions: Sensory, Integration, and Motor. It all starts with nerves, from there they run signals to other nerves and then eventually to the spinal cord. From there they are sent up the spinal cord to the brain and interepreted with directions sent back down. In the time it took you to read this millions of signals have taken this route and came back. What's really interesting is that there are two types of synapse, chemical and electrical, which are determined by the junction. If it's a nueron to effector cell it's a chemical synapse, if it's neuron to neuron it's an electric synapse. A synapse is the junction where communication is made. The nervous system is incredibly complex and large. When you look at it looks like a tree root system and when you think of the comparison the tree's roots are where the life blood is absorbed. Without the nervous system we would be missing our lifeblood of safety in determining something is wrong or right, hot or cold, or the ability to just move. A paragraph is not long enough to explain this system