describe the human brain with all important points
Answers
Answer: The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain has the same basic structure as other mammal brains but is larger in relation to body size than any other brains.
Facts about the human brain
The human brain is the largest brain of all vertebrates relative to body size.
It weighs about 3.3 lbs. (1.5 kilograms).
The average male has a brain volume of 1,274 cubic centimeters.
The average female brain has a volume of 1,131 cm3.
The brain makes up about 2 percent of a human's body weight.
The cerebrum makes up 85 percent of the brain's weight.
It contains about 86 billion nerve cells (neurons) — the "gray matter."
It contains billions of nerve fibers (axons and dendrites) — the "white matter."
These neurons are connected by trillions of connections, or synapses.
Anatomy of the human brain
The largest part of the human brain is the cerebrum, which is divided into two hemispheres, according to the Mayfield Clinic. Underneath lies the brainstem, and behind that sits the cerebellum. The outermost layer of the cerebrum is the cerebral cortex, which consists of four lobes: the frontal, parietal, temporal and occipital. [Nervous System: Facts, Functions & Diseases]
Like all vertebrate brains, the human brain develops from three sections known as the forebrain, midbrain and hindbrain. Each of these contains fluid-filled cavities called ventricles. The forebrain develops into the cerebrum and underlying structures; the midbrain becomes part of the brainstem; and the hindbrain gives rise to regions of the brainstem and the cerebellum.
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Answer:
The brain is one of the largest and most complex organs in the human body.
It is made up of more than 100 billion nerves that communicate in trillions of connections called synapses.
The brain is made up of many specialized areas that work together:
• The cortex is the outermost layer of brain cells. Thinking and voluntary movements begin in the cortex.
• The brain stem is between the spinal cord and the rest of the brain. Basic functions like breathing and sleep are controlled here.
• The basal ganglia are a cluster of structures in the center of the brain. The basal ganglia coordinate messages between multiple other brain areas.
• The cerebellum is at the base and the back of the brain. The cerebellum is responsible for coordination and balance.
The brain is also divided into several lobes:
• The frontal lobes are responsible for problem solving and judgment and motor function.
• The parietal lobes manage sensation, handwriting, and body position.
• The temporal lobes are involved with memory and hearing.
• The occipital lobes contain the brain's visual processing system.
The brain is surrounded by a layer of tissue called the meninges. The skull (cranium) helps protect the brain from injury.