The brain is the center of the nerv

The brain is the center of the nervous system in all vertebrate and most invertebrate animals. Some primitive animals such as jellyfish and starfish have a decentralized nervous system without a brain, while sponges lack any nervous system at all. In vertebrates the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, balance, taste, and smell.
Brains can be extremely complex. The cerebral cortex of the human brain contains roughly 15–33 billion neurons, perhaps more, depending on gender and age, linked with up to 10,000 synaptic connections each. Each cubic millimeter of cerebral cortex contains roughly one billion synapses. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body and target them to specific recipient cells.
The brain controls the other organ systems of the body, either by activating muscles or by causing secretion of chemicals such as hormones and neurotransmitters. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness are possible without a brain: even single-celled organisms may be capable of extracting information from the environment and acting in response to it. Sponges, which lack a central nervous system, are capable of coordinated body contractions and even locomotion. In vertebrates, the spinal cord by itself contains neural circuitry capable of generating reflex responses as well as simple motor patterns such as swimming or walking. However, sophisticated control of behavior on the basis of complex sensory input requires the information-integrating capabilities of a centralized brain.
Despite rapid scientific progress, much about how brains work remains a mystery. The operations of individual neurons and synapses are now understood in considerable detail, but the way they cooperate in ensembles of thousands or millions has been very difficult to decipher. Methods of observation such as EEG recording and functional brain imaging tell us that brain operations are highly organized, while single unit recording can resolve the activity of single neurons, but how individual cells give rise to complex operations is unknown.

Kết quả (Anh) 2:

The brain is the center of the nervous system in all vertebrate and most invertebrate animals. Some primitive animals such as jellyfish and starfish have a decentralized nervous system without a brain, while sponges lack any nervous system at all. In vertebrates the brain is located in the head, protected by the Skull and Close to the Primary sensory Apparatus of Vision, Hearing, Balance, Taste, and smell.
Brains CAN be Extremely complex. The cerebral Cortex of the Human brain contains neurons Roughly 15-33 Billion, Perhaps More, depending on gender and age, linked with up to 10,000 synaptic connections each. Each cubic millimeter of cerebral cortex contains roughly one billion synapses. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to Distant Parts of the brain or body and target Them to specific recipient cells.
The brain Controls the other Organ Systems of the body, either by activating muscles or by Causing Chemicals SUCH as secretion of hormones and Neurotransmitters. This Rapid and Centralized Control android.permission . coordinated responses to changes in the environment Some basic types of responsiveness are possible without a brain:. even single-celled organisms may be capable of extracting information from the environment and acting in response to it Sponges, which lack a central nervous system, are capable of coordinated body contractions and even locomotion. In vertebrates, the spinal cord by itself contains neural circuitry capable of generating reflex responses as well as simple motor patterns such as swimming or walking. However, sophisticated control of behavior on the basis of complex sensory input requires the information-Integrating Capabilities of a Centralized brain.
Despite Rapid Scientific Progress, much about How Brains Work Remains a Mystery. The Operations of Individual Synapses neurons and are now in considerable Detail Understood, BUT the Way They Cooperate in ensembles of Thousands or Millions has been very difficult to decipher. Methods of observation such as EEG recording and functional brain imaging tell us that brain operations are highly organized, while single unit recording can resolve the activity of single neurons, but how individual cells give rise to complex operations is unknown ʱ??

Kết quả (Anh) 3:

Brain is the center of the nervous system in all vertebrate and most invertebrate animals. Some primitive animals such as jellyfish and starfish have a decentralized nervous a without brain system sponges while any lack system nervous all. at vertebrates In brain the is located in the head protected the skull and close to the primary sensory of apparatus vision hearing The,, taste, balance, by,Smell.
Brains can be extremely complex. The cerebral cortex of brain human the contains roughly 15 - 33 neurons perhaps, more billion, depending, on gender and age linked, with up to synaptic 10000 connections each. Each cubic millimeter of cerebral cortex contains one roughly synapses. billion neurons These with communicate another one means of long protoplasmic fibers called and axons by,Carry trains of signal pulses called action potentials to distant parts of the brain or and body them target specific to cells.
The recipient controls brain other organ systems the the of body either, by activating muscles or by causing secretion of chemicals such as hormones and neurotransmitters. whichCentralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness are possible without a brain: even single-celled organisms from be may of capable information extracting the environment and acting in response it. Sponges to which, lack a central nervous system are, capable of coordinated body contractions and even locomotion. ThisVertebrates the, spinal cord by itself contains neural circuitry capable of generating reflex responses as well as simple motor patterns such as swimming walking. However or sophisticated behavior, control of the on of basis complex sensory input requires the information-integrating capabilities of a centralized brain.
Despite rapid scientific progress In,About how brains work remains a mystery. The operations of individual neurons and synapses are now considerable in detail understood but they, the way in cooperate of ensembles or thousands has millions been very difficult to decipher. Methods of observation such as EEG recording tell functional and imaging brain us that brain operations are highly organized much,While single unit recording can resolve the activity of single neurons, but how individual cells give rise to complex operations is unknown.