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Members of the Phylum Nematoda (worms) are the first animals to have a thing called brain.However, their "brain" or "Central Nervous System" are just comprised of a few ganglion on the cephalic (head) side of the worm, with a few nerves branching out of it.
Wiki User
∙ 11y ago
Wiki User
∙ 10y agoThe first animals to have a well-defined central nervous system are lost in time, way back in the Cambrian - 540 million years ago, but will have looked something like flatworms. Their "brain" consists of two fused anterior ganglia, with a simple "spinal chord" attached, to which connects the peripheral nervous system - in this case simply laterally projecting from the central stem.
Interestingly, more than 95% of the genes involved in the development of this primitive nervous system is also present in humans.
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What animal were the first to develop four limbs?
Birds
Which is develop first heart or brain?
Both at the same time but the brain works before the heart pumps
When does the brain develop?
When your barley being formed it is the first thing formed.
Does the heart or brain develop first in the fetus?
Both the same time but the brain functions before the heart pumps
How does the brain develop?
The human brain is first developed when you're just an embryo. It's the first organ to be developed when you're in the stomach. By the time you're born you have at least one billion brain cells. (I hope this is better)
How do you have brain development?
By being positive you can develop your brain,
The last part of the brain to develop?
The frontal lobe is the last part of the brain to develop fully.
How could you compare and contrast a cat brain and an animal brain?
A cat is an animal.
How does the brains of a child develop in the womb?
In the first three weeks, the embryo has formed the forebrain, the midbrain and the hindbrain. In your second trimester, the major structures of the brain are in place and functioning. From this point the brain and organs continue to develop.
Where do astrocytomas develop?
Astrocytomas can develop on any part of the brain or spinal cord
How old are when your brain is full gron?
At the age of 25 is when the brain is fully developed. You brain takes time to develop.
What brain disease can develop in those with mental retardation?
People with Down syndrome will develop the brain changes that characterize Alzheimer's disease in later life and may develop the clinical symptoms of this disease as well.
