His Lab 6 - Nervous System

Node of ranvier

In longitudinal sections (l.s.), nerves have a pale
wavy appearance with oval Schwann cell nuclei
orientated in the same direction. The axons appear
as pale acidophilic lines while the clear area around
the axon represents the leached-out myelin.

Schwann cell nuclei

Node of ranvier

epineurium (around several bundles)

cross sections of myelinated axons are outlined || notes:In cross section (x.s.), axons appear as a pink dot
surrounded by a clear halo (myelin sheath). The
myelin, primarily lipid, is dissolved away during
tissue processing, leaving a clear space.

cross section

longitudinal

stratified squamous, keratinized

skeletal muscle (in cross section.)

skeletal muscle (in longitudinal section)

smooth muscle (in longitudinal section)

peripheral nerve

– plasma cell

gland duct

The dorsal root ganglion with closely packed cell bodies of different sizes at the edge of the ganglion by the CT

Glial cells - satellite cells

Nissl substance

Schwann cell - PNS

cell body

sympathetic ganglion

dorsal root ganglion

– parasympathetic ganglion

smooth muscle (in cross section)

cardiac muscle (in cross section)

Meissner’s touch corpuscle

Peripheral nerves with thick perineurium

Meissner’s touch corpuscle

Pacinian corpuscle

spongy bone

chondrocyte

motor end plate - the special junction that the lower motor neuron forms on skeletal muscle

neuron - cell body with nucleus and clumps of cytoplasm

Nissl substance

red - dorsal roots blue - ventral roots

cerebrum, specifically cerebral cortex

Pyramidal cells

Purkinje cells