Both- larynx, lungs, heart, gastrointestinal (s) (m)
Accessory Spinal Nerve
motor-movement of neck, viscera, swallowing
4 main regions of spinal cord
Functional significance of the dorsal part of spinal cord
Posterior, Afferent, sensory-->CNS
Functional significance of the ventral part of spinal cord
Anterior, Efferent, motor-->PNS/effector organs
Define ascending tracts
transmit info from spinal cord to brain (rise)
Define descending tracts
transmit info from brain to spinal cord
Describe Dura mater
"Hard, durable mother"
Outer most layer of meninges, tough fibrous tissue touches bone
Describe Arachnoid mater
middle layer of meninges, weblike structure touches dura mater, no space between
-subarachnoid mater-space between arachnoid and pia filled w/CSF
Describe Pia mater
"tender, kind mother"
inner most layer of meninges, adjacent to nerve tissue adheres to brain/spinal cord
The Ventricular System
system of 4 ventricles
Holds CSF (proteins and glucose) providing nourishment and protection
Describe Blood Brain Barrier
made of modified capillaries made of endothelial cells that have pores between them. the capillaries that line the brain are also endothelial cells but have tight junctions to reduce space and covered by feet of astrocytes.
Helps seperate blood circulating in capillaries (which may be carrying toxins) from mixing w the extracellular fliud of the brain.
List 6 major divisions of brain
List components of midbrain and its function
part of brainstem, conduction pathway between higher and lower brain centers
tectum: (roof) responsible for auditory and visual reflexes
tegumentum:(covering) involved in many unconscious homeostatic and reflexive pathways.
List functions of pon
relay info from cerebrum to cerebellum.
co-operates with medualla oblongata (respiratory rate)