organisation of the nervous system Flashcards
(structures of the nervous system)
brain
neurons enclosed in skull
(structures of the nervous system)
Spinal cord
connects to brain
enclosed in spinal cavity
(structures of the nervous system)
Nerves
bundles of neuronal axons
-cranial nerves emerges from brain
-spinal nerves emerges from spinal cords
(structures of the nervous system)
Ganglia
groups of cell bodies outside the brain/spinal cord
(structures of the nervous system)
Enteric plexuses
networks in digestive tract
(structures of the nervous system)
Sensory receptors
monitor changes in internal/external environments
(function of nerves)
Sensory receptors & afferent nerves
carry information to brain/spinal cord
(function of nerves)
Inter-neurones
integration (information processing)
-carried by short interneurons
(function of nerves)
motor activity-efferent (motor) nerve
carry signals from the brain/spinal cord to glands and muscles (effectors)
(Nervous System Organisation)
1. Central nervous system (CNS)
brain
spinal cord
(Nervous System Organisation)
2. Peripheral nervous system (PNS)
all nervous tissue outside the CNS
Name the 3 Peripheral nervous system
Somatic nervous system (SNS)
Autonomic nervous system (ANS)
Enteric nervous system (ENS)
(Peripheral nervous system)
Somatic nervous system (SNS)
sensory neurons in somatic receptors
motor neurons to skeletal muscle.
(Peripheral nervous system)
Autonomic Nervous System (ANS)
sensory neurons from autonomic receptors
motor neurons to smooth muscle, cardiac muscle and glands.
(Peripheral nervous system)
Enteric Nervous System (ENS)
sensory and motor neurons of the GI tract