There are certain physiological similarities between humans and reptilians. We have what is known as the "reptilian brain".
It controls vital functions such as heart rate, breathing, body temperature and balance. Our reptilian brain also includes the main structures found in a reptile's
brain, namely the brainstem and the cerebellum. The reptilian brain is reliable but tends to be somewhat rigid and compulsive.
Our eyes are also constructed like the eyes of reptiles. In both humans and reptiles, the eye acts as a box with a lens to focus the light that passes through it.
Cells within the eye process the light and turn it into useful information.
The humans and lizard heart is Indistinguishable. Photo: Bjarke Jensen
Scientists have for long been aware of that the lizard has a heart that is virtually indistinguishable from a human embryonic heart.
While the structure of the human heart has been known for a long time, the evolutionary origin of our conduction system has nevertheless remained a mystery.
Now, a century-old mystery has thereby finally been unravelled about the evolution of the human heart
Researchers have finally succeeded in showing that the spongy tissue in reptile hearts is the forerunner of the complex hearts of both birds and mammals.
The new knowledge provides a deeper understanding of the complex conductive tissue of the human heart, which is of key importance in many heart conditions.
"The heart of a bird or a mammal - for example a human - pumps frequently and rapidly.
This is only possible because it has electrically conductive tissue that controls the heart.
Until now, however, we haven't been able to find conductive tissue in
our common reptilian ancestors, which means we haven't been able to understand how this enormously important system emerged," says Bjarke Jensen, Department of
Bioscience, Aarhus University.
The reptilian heart has a thin wall surrounding a spongy inner part. In many ways, this resembles the embryonic state in birds, humans and other mammals.
The anatomy of their hearts is subsequently completely different from reptiles, but studies of the genetic building blocks now show that all
the hearts have a common molecular structure.
The reptilian heart can thus provide us with insight into how the heart works in a human. Figure: Bjarke Jensen
Along with Danish colleagues and colleagues from the University of Amsterdam, he now reveals that the genetic building blocks for highly developed
conductive tissue are actually hidden behind the thin wall in the spongy hearts of reptiles.
Since the early 1900s, scientists have been wondering how birds and mammals could have developed almost identical conduction systems independently
of each other when their common ancestor was a cold-blooded reptile with a sponge-like inner heart that has virtually no conduction bundles.
"We studied the hearts of cold-blooded animals like lizards, frogs and zebrafish, and we investigated the gene that determines which parts of the heart are
responsible for conducting the activating current," Dr Jensen.
"By comparing adult hearts from reptiles with embryonic hearts from birds and mammals, we discovered a common molecular structure that's hidden by the
anatomical differences," he added.
Did humans evolve from reptilians?
The subject of the human reptilian connection is old. Reptilian-like humanoids and "Lizard- people" are described in many ancient texts and religions.
"As long as humanity has kept records of its existence, legends of a serpent race have persisted. These myths tell of a mysterious race of superhuman
reptilian beings who descended from the heavens to participate in creating humankind and to teach the sciences, impart forbidden knowledge, impose social order,
breed with us, and watch over our development.
The serpent like beings were not alone, but were part of a retinue of super beings thought to be gods by the ancients.
Yet, in cultures as widespread and diverse as those of Sumeria, Babylonia, India, China, Japan, Mexico, and Central America, reptilian gods have been
feared and worshipped. To this day the dragon or serpent signifies divine heritage and royalty in many Asian countries,
while in the West, the serpent represents wisdom and knowledge. The symbol of two serpents coiled around a staff (originally signifying the tree of knowledge of
ancient myth), known as the caduceus, is today used by the American Medical Association as its logo," wrote Joe Lewels, Ph.D in his article
"The Reptilians: Humanity's Historical Link to the Serpent Race".
The subject of reptilians has become popular since some decades when,
David Icke, stated that some human beings on Earth are not normal like us
and they are reptilians.
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