Answer
Verified
405.3k+ views
Hint: The organ system in animals that contain networking of neurons which are specialized cells and these specialized cells coordinate the actions and transmit signals between various parts of the animal’s body. It is the most important controlling and regulatory system in the body of the animal. The nervous system is classified as the Central nervous system (CNS) and the Peripheral nervous system (PNS).
Complete Answer:
- The central nervous system is made up of the brain and the spinal cord. The name ‘Central’ suggests that it combines information from the entire body and coordinates activity across the whole body of an animal.
- The brain controls all the activities of the body and it uses most of the body's energy.
- The brain and spinal cord are connected through a part of the brain called the brainstem.
- The spinal cord, a tubular structure consisting of nervous tissues runs from the head and middle of back in downward direction. The spinal cord runs through the spinal canal. The main function of the spinal cord is to transmit signals to and fro between the brain and the peripheral nervous system.
- The smallest unit of the Central nervous system is the neuron.
Therefore, option (D) is correct.
Note: Though most animals have brains, but there are few exceptions. For example, sponges don’t have any kind of nervous tissue or brain. The jellyfishes don’t have a brain, heart or even blood. Some of the animals without brains are sea star, sea cucumber and sea anemone.
Complete Answer:
- The central nervous system is made up of the brain and the spinal cord. The name ‘Central’ suggests that it combines information from the entire body and coordinates activity across the whole body of an animal.
- The brain controls all the activities of the body and it uses most of the body's energy.
- The brain and spinal cord are connected through a part of the brain called the brainstem.
- The spinal cord, a tubular structure consisting of nervous tissues runs from the head and middle of back in downward direction. The spinal cord runs through the spinal canal. The main function of the spinal cord is to transmit signals to and fro between the brain and the peripheral nervous system.
- The smallest unit of the Central nervous system is the neuron.
Therefore, option (D) is correct.
Note: Though most animals have brains, but there are few exceptions. For example, sponges don’t have any kind of nervous tissue or brain. The jellyfishes don’t have a brain, heart or even blood. Some of the animals without brains are sea star, sea cucumber and sea anemone.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Why Are Noble Gases NonReactive class 11 chemistry CBSE
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
At which age domestication of animals started A Neolithic class 11 social science CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Write a letter to the principal requesting him to grant class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE