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What are the brainless animals?
A jellyfish & a starfish A Jellyfish has no brain & no heart A starfish has no brain & no blood
What is an IQ for a starfish?
A starfish has no brain, so IQ=0
Does a seastar have a brain?
Sea Star is the nickname. The official name is Starfish. Yes, the starfish has a brain. A distributed brain. Starfish have a complex network of interlacing nerves in each arm ehich all connect to the brain.
Do starfish have a brain?
Starfish do not have true brains. They have a cluster of nerves called ganglia that form a ring in the centre of the starfish which is called the circumoral nerve ring. A radial nerve extends at right angles from the circumoral nerve ring into each arm. With the exception of eye spots in the tip of each arm there are no specialised sense organs (such as eyes or ears). These eyespots sense light and send back messages to the main nerve centre. The starfish is a primitive organism and as such does not make conscious decisions to eat or sleep. Changes in light intensity will cause different firing rates of nerves, which may equate to sleep. Minute traces of odours from clams and mussels or from dead fish will also excite the nervous system and will initiate the feeding cycle. A lot of these "sleep/wake" cycles or feeding cycles will be dictated by changes in light intensity or tidal rise and fall. All the best Starfish do not have true brains. They have a cluster of nerves called ganglia that form a ring in the centre of the starfish which is called the circumoral nerve ring. A radial nerve extends at right angles from the circumoral nerve ring into each arm. With the exception of eye spots in the tip of each arm there are no specialised sense organs (such as eyes or ears). These eyespots sense light and send back messages to the main nerve centre. The starfish is a primitive organism and as such does not make conscious decisions to eat or sleep. Changes in light intensity will cause different firing rates of nerves, which may equate to sleep. Minute traces of odours from clams and mussels or from dead fish will also excite the nervous system and will initiate the feeding cycle. A lot of these "sleep/wake" cycles or feeding cycles will be dictated by changes in light intensity or tidal rise and fall. All the best
What animal have no brain?
starfish
Does a starfish have a brain?
the starfish does not have a brain it is made up of nerve cells that control it's functions A starfish doesn't have a brain in its head like we do. Instead their entire nervous system acts like a distributed brain. So, it has a brain, just not like ours.
How are starfish and penguins alike?
PLease TELL ME I DONT KNOW AND STARFISH ARE WELL I DONT KNOW
How does a starfish migrate?
starfish dont migrate they stay in interl zone
What animal has 5 arms and no brain?
Starfish have five arms and no brain.
What system does a sea star NOT have?
Starfish do not have a brain.
Do starfish have hearts?
They have no heart, brain, or eyes.
What organs are not present in starfish?
The brain is one.
