3.01 Remember the structures of the nervous system Essential Question
¢ What are the structures of the nervous system?
3.01 Remember the structures of the 2 nervous system Introduction: Structures of the nervous system
3.01 Remember the structures of the 3 nervous system Cellular structures of the nervous system Neuron- a nerve cell ¢ Extensions of the neuron
© Dendrites - many
© Axon - one
3.01 Remember the structures of the 4 nervous system Cellular structures of the nervous system Neuron- a nerve cell © Myelin sheath - a special covering of the axon
© Synapse – the space between neurons
3.01 Remember the structures of the 5 nervous system Structures of the nervous system
© Brain
3.01 Remember the structures of the 6 nervous system Structures of the nervous system
¢ Peripheral nervous system
© Nerves
´ Spinal nerves
© Sensory receptors
3.01 Remember the structures of the 7 nervous system Structures of the central nervous system: BRAIN
3.01 Remember the structures of the 8 nervous system 3.01 Remember the structures of the 9 nervous system Structures of the central nervous system: BRAIN
¢ Cerebrum © Divided into two hemispheres (right and left)
© Frontal lobe © Occipital lobe © Parietal lobe © Temporal lobe
3.01 Remember the structures of the 10 nervous system Structures of the central nervous system: BRAIN ¢ Diencephalon ©Located between the cerebrum and the midbrain ©Structures ´ Thalamus ´ Hypothalamus ´ Pineal body ´ Pituitary gland
3.01 Remember the structures of the 11 nervous system Structures of the central nervous system: BRAIN ¢ Diencephalon © Thalamus – spherical mass of gray matter; deep in the cerebral hemispheres © Hypothalamus – lies below the thalamus; part of the limbic system © Pineal body – endocrine system gland © Pituitary gland – endocrine system gland
3.01 Remember the structures of the 12 nervous system Structures of the central nervous system: BRAIN ¢ Limbic system © Located in the center of the brain © Encircles the top of the brain stem.
© Composed of the amygdala, hippocampus, cingulated gyrus, and other intricate structures. (Informational only for reference.)
3.01 Remember the structures of the 13 nervous system Structures of the central nervous system: BRAIN
3.01 Remember the structures of the 14 nervous system Structures of the central nervous system: BRAIN
Brain stem © Midbrain © Pons © Medulla oblongata
3.01 Remember the structures of the 15 nervous system Structures of the central nervous system: BRAIN
¢ Meninges © Dura mater ´ Outermost layer © Arachnoid ´ Middle layer © Pia mater ´ Innermost layer
3.01 Remember the structures of the 16 nervous system Structures of the central nervous system: BRAIN
¢ Ventricles - lined cavities deep within the brain © filled with cerebrospinal fluid © Choroid plexus – rich network of blood vessels
3.01 Remember the structures of the 17 nervous system Structures of the Central NS: Spinal Cord © Surrounded by the vertebrae, meninges, and cerebrospinal fluid © Nerve = bundles of nerve fibers enclosed by connective tissue. © Sensory (afferent)-carry impulse from sensory organ to the brain/spinal cord © Motor (efferent)-carry impulse from brain/spinal cord to muscles or glands © Mixed nerve contains both fibers.
3.01 Remember the structures of the 18 nervous system Structures of the central nervous system: Spinal Cord ¢ Peripheral nervous system © 12 cranial nerves © 31 pairs of spinal nerves
3.01 Remember the structures of the 19 nervous system Structures of the central nervous system
© I. Olfactory--Smell © II. Optic --Vision © III. Oculomotor—Movement of eye muscle © IV. Trochlear—Movement of eye muscle © V. Trigeminal—Chewing (face/teeth muscle) © VI. Abducens—Movement of eye muscle © VII. Facial—Facial Expressions, taste © VIII. Vestibulocochlear--Hearing and Balance © IX. Glossopharyngeal—Movement of throat, taste © X. Vagus—Movement of throat affects heart, digestive © XI. Accessory—Movement of neck © XII. Hypoglossal—Movement of tongue
3.01 Remember the structures of the 20 nervous system Structures of the central nervous system
¢ Peripheral nervous system © 31 pairs of spinal nerves
3.01 Remember the structures of the 21 nervous system Structures of the central nervous system
¢ Peripheral nervous system © 12 cranial nerves © 31 pairs of nervous
3.01 Remember the structures of the 22 nervous system Structures of the central nervous system
¢ Motor system © Autonomic nervous system ´ Sympathetic nervous system-may accelerate heart rate in response to fear ´ Parasympathetic nervous system-may slow heart rate ´ Both are strongly influenced by emotion and work together to balance responses . © Somatic nervous system
3.01 Remember the structures of the 23 nervous system 3.01 Remember the structures of the 24 nervous system Structures of the central nervous system Autonomic nervous system ¢ Sympathetic ¢ Parasympathetic nervous system nervous system © Extends from the base © The vagus nerve of the brain, along both connects the medulla sides of the spinal with organs of the column upper body © These nerves connect © The pelvic nerve to all internal organs emerges from the spinal cord and connects with the organs of the lower body
3.01 Remember the structures of the 25 nervous system Structures of the central nervous system Somatic nervous system
© These nerves are located along the spinal cord.
© Connect skeleton, muscles and joints to the brain.
3.01 Remember the structures of the 26 nervous system Structures of the central nervous system
3.01 Remember the structures of the 27 nervous system Structures of the nervous system
3.01 Remember the structures of the 28 nervous system Essential question
¢ What are the structures of the nervous system?
3.01 Remember the structures of the 29 nervous system