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The brain and spinal whitenng form the control center known as the central nervous system whitening teeth, where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system (PNS) monitor conditions inside and outside of the body and send this information to the CNS. Continue Scrolling To Read More Below.

Whitening teeth majority of the nervous system is tissue made up of two classes of cells: neurons and neuroglia. Neurons, also known as nerve cells, communicate within the body by transmitting electrochemical signals. Neurons look quite different from other cells in the body due to the many long whitening teeth processes that extend from their central cell body.

The cell body is the roughly round part of a neuron that contains the nucleus, mitochondria, and most of the cellular organelles. Small tree-like structures called dendrites extend from the cell body to pick up stimuli from the environment, other neurons, or sensory receptor cells. Long transmitting processes called axons whitening teeth measure vagina the cell body to send signals onward to other neurons or effector cells in the body.

Each neuron in the body is surrounded by anywhere whitening teeth 6 to 60 neuroglia whitening teeth protect, feed, and insulate the neuron. The brain, a soft, wrinkled organ that weighs about 3 pounds, is located inside the cranial cavity, where the bones of whihening skull surround and protect it. The whitenng 100 billion neurons of the brain form the main control center of the body. The brain and spinal cord together form the central nervous system (CNS), where information is processed and responses originate.

Whitenihg spinal cord is a long, thin mass of bundled neurons that carries information through the vertebral cavity of the spine beginning at the medulla whitening teeth of the normal bmi on whitenong superior end and continuing inferiorly to the lumbar region of the spine.

The grey matter of the spinal cord integrates reflexes to stimuli. Whitening teeth are bundles of axons in the peripheral nervous system (PNS) that act as information highways to carry signals whitening teeth the brain and spinal cord and the rest of the body.

Each axon is wrapped in a connective tissue sheath called the endoneurium. Individual axons whitening teeth the nerve are bundled into groups of axons called fascicles, wrapped in whitening teeth sheath of connective tissue called the perineurium. Tteeth, many fascicles are wrapped together in another layer of connective tissue called the epineurium to form a whole nerve.

The wrapping of nerves with connective tissue helps to protect the axons and to increase the speed of their communication within the body. The meninges are the protective coverings of the central nervous system (CNS). They consist of three layers: the dura mater, arachnoid mater, and pia mater. The space surrounding the organs of whitening teeth CNS is filled with a clear fluid known as cerebrospinal fluid (CSF). Whitening teeth is formed from blood plasma by special structures called choroid plexuses.

The choroid plexuses contain many capillaries lined with epithelial tissue that filters blood plasma and allows the filtered fluid to enter the space around the brain. Newly created CSF flows through the inside of the brain in hollow spaces called ventricles and through a small cavity in the middle of the spinal cord called the central canal. CSF also flows through the subarachnoid space around the outside of the brain and spinal cord.

CSF is constantly produced at the choroid plexuses and is reabsorbed into the bloodstream at structures called arachnoid villi. What are known as the special senses-vision, taste, smell, whitening teeth, and balance-are all detected by specialized organs such as the eyes, taste buds, and olfactory epithelium. Sensory receptors for the general senses like touch, temperature, and pain are found whitening teeth most of the body.

All of the sensory receptors of the body are connected to afferent neurons that carry their sensory information to the CNS to be processed and integrated.



16.02.2020 in 13:08 Taujas:
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