Nervous System Flashcards
Importance of Nervous System to embalmers
The vagus nerve sometimes gets mistaken for RCCA
- Provides many control functions of the body
- It controls muscular contractions, both voluntary and involuntary, rapid changing visceral events and even rates of the secretion of some endocrine glands
- This system receives millions of bits of information from the different sensory organs, interprets them and determines specific responses
The Nervous System
The Nervous System may be divided into 2 parts, the___________ and the ___________.
the central nervous system and the peripheral nervous system
The ________ and the _________ comprise the Central Nervous System (CNS)
The brain and the spinal cord
- Receives sensory information, process it and sends out motor signals in response.
- It is the seat of intelligence and is house in the skull of cranium
Brain
Brain is in the _______
Skull or cranium
- This is a very large bundle of nerve fibers
- Found within the vertebral column (for protection)
- The major trunk line carrying information to and from the brain
- It extends from the foramen magnum at the base of the skull to the upper part of the lumbar region
Spinal Cord
The _______ consists of nerves that arises from the CNS and connect to other parts of the body.
Sensory nerves send messages to the brain and motor nerves carry responses from the brain.
The Peripheral Nervous System (PNS)
Two parts of Peripheral Nervous System
Somatic System and Autonomic System
Connects the CNS with the skin and muscle.
Overseas conscious activities like standing, walking and turning.
Somatic System (voluntary)
Connects the CNS to the viscera and controls unconscious or involuntary activities such as heartbeat, breathing and response to danger.
Autonomic System (involuntary)
The _______, the main autonomic trunk, arises from the brain and passes through the neck, in close association with the common carotid artery and internal jugular vein.
The vagus nerve
Vagus nerve and the large nerves of the arms and legs are all found close beside ______ and ______.
Large arteries and veins
The three (vagus nerve, common carotid artery and internal jugular vein) are bound together in a __________
common connective tissue sheath
How to differentiate large nerves from arteries?
- Nerves are more white in color than cream.
- When pressed with fingers, a nerve feels like a bundle of small cords bound together, arteries do not feel this way