Contains the sympathetic and parasympathetic nervous systems, which work together to control involuntary body functions.
Autonomic nervous system
the largest and highest section of the brain. The outer part is arranged in folds, called convolutions, and separated into lobes.
Cerebrum
the section located below the cerebrum at the top of the brainstem. It is responsíble for conducting impulses between brain parts and for certain eye and auditory reflexes.
Midbrain
consists of the nerves and has two divisions: the somatic nervous system and the autonomic nervous system
peripheral nervous system
acts as a relay center and directs sensory impulses to the cerebrum. It also allows conscious recognition of pain and temperature.
Thalamus
is a mass of nerve tissue well protected by membranes and the cranium, or skull
Brain
the section located between the cerebrum and midbrain. It contains two structures: the thalamus and hypothalamus.
Diencephalon
are a combination of many nerve fibers located outside the brain and spinal cord.
Nerves
the section located below the midbrain and in the brainstem. It is responsible for conducting messages to other parts of the brain; for certain reflex actions including chewing, tasting, and saliva production; and for assisting with respiration.
Pons
hollow spaces that connect with each other and with the space under the arachnoid membrane (the subarachnoid space).
Ventricles
consists of the brain and spinal cord
central nervous system
regulates and controls the autonomic nervous system, temperature, appetite, water balance, sleep, and blood vessel
Hypothalamus
is a complex, highly organized system that coordinates all the activities of the body. This system enables the body to respond and adapt to changes that occur both inside and outside the body
nervous system
carries messages between the CNS and the body.
somatic nervous system
the section below the back of the cerebrum. It is responsible for muscle coordination, balance, posture, and muscle tone.
Cerebellum
the lowest part of the brainstem. It connects with the spinal cord and is responsible for regulating heartbeat, respiration, swallowing, coughing, and blood pressure
medulla oblongata
The basic structural unit of the nervous system is the
Neuron
continues down from the medulla oblongata and ends at the first or second lumbar vertebrae. It is surrounded and protected by the vertebrae
spinal cord
The ventricles are filled with a clear, colorless fluid called
cerebrospinal fluid
are three membranes that cover and protect the brain and spinal cord.
Meninges
These two systems usually work together to maintain a balanced state, or homeostasis, in the body and to control inyoluntary body functions at proper rates
parasympathetic
the sympathetic nervous system prepares the body to act by increasing heart rate, respiration,a and blood pressure, and by slowing activity in the digestive tract
Sympathetic