A&P I Nervous system 4th practical (Revised)

Dendrite

Neuroglia

Neuron

synaptic knob/terminal bulb

Nucleus

cell body/soma/perikaryon

axon hillock

Nissl bodies

rough ER of neuron

Smooth Endoplasmic Reticulum

Axon hillock

neurolemma

myelin sheath

Endoneurium

Nodes of Ranvier

spinal nerve

dorsal ganglion

gray commissure with central canal

dorsal horn

ventral horn

denticulate ligaments

ventral root

dura mater

pia mater

white matter

gray matter

dorsal root

dorsal median sulcus

Reflex Arc

A relatively direct connection between a sensory neuron and a motor neuron that allows an extremely rapid response to a stimulus, often without conscious brain involvement.

Order of Reflex Arch

1) Receptor-site of stimulus action

2) Sensory neuron transmits afferent impulses to CNS

3) Integration center consists of 1 or more neurons in CNS

4) Motor neurons conduct efferent impulses to effector organ

5) Effector (muscle fibers or glands) respond to efferent impulse

ventral median sulcus

arachnoid mater

ventral column

dorsal column

frontal lobe

temporal lobe

parietal lobe

occipital lobe

pre-central gyrus

central sulcus

postcentral gyrus

Cerebellum

Pons

medulla oblongata

spinal cord

Sulcus

longitudinal fissure

Diencephalon

Thalamus

hypothalamus

Midbrain

Schwann cells

Type of neuroglia that produce myelin in PNS (forming myelin sheaths)

Microglia

Type of neuroglia that act as macrophages and remove damaged or invading cells

Ependymal cells

A type of neuroglia that line the ventricles in the brain. They manufacture CSF and circulate it through the empty ventricles into the rest of the CNS.

Oligodendrocytes

Type of neuroglia that produces myelin in CNS.

Astrocytes

A type of neuroglia that regulates the transmission of electrical impulses within the brain and provide neurons with nutrients. Also, it forms scar tissue the brain and provide neurons with nutrients.

pyramids of the medulla

corpus callosum

pituitary gland

Neuroplasm

cytoplasm of the neuron.

Neurofibrils

the cytoskeleton of the neuron.

pineal gland

lateral ventricle

third ventricle

cerebral aqueduct

fourth ventricle

junction of medulla and spinal cord (9)

central canal of spinal cord

Pinna (auricle)

external auditory canal

ceruminous glands

tympanic membrane

middle ear

tympanic antrum

Eustachian tube

auditory ossicles

malleus

incus

oval window

round window

inner ear

utricle

saccule

semicircular canal

ampulla

cochlea

scala vestibuli

scala tympani

cochlear duct

spiral organ ( organ of corti)

tectorial membrane

vestibular membrane

sclera

Cornea

choroid

ciliary processes

ciliary muscles

iris

pupil

retina

central fovea