Skin and Nervous tissue Histology

epidermis layer

stratum basale

layers of the epidermis

(deep to proximal)

basale, spinosum, granulosum, (lucidum), corneum

stratum granulosum

(notice the lack of nuclei and other organelles)

stratum corneum

layers of the dermis

papillary and reticular

(layer)

papillary later- notice the adhesions

(structure)

dermal palillae

(structure)

papillary capillaries

(layer)

dermis

dense irregular CT

(structure)

eccrine sweat gland

(layer)

hypodermis

(layer)

stratum lucidum

only in thick skin

(structure)

hair follicle (longitudinal)

(structures 1, 2, and 3)

hair follicle (transverse)

(structure)

erector pili

associated with a hair follicle

melanocyte

stratum spinosum

Sebaceous gland

notice how it is near a hair follicle

subendocardial/Purkinje fibers

notice how they are much longer than the surrounding cardiac cells

notice how they are lighter in color

(layer)

epineurium

dense irregular connective tissue

(layer)

perineurium

notice how it surrounds nerve fascicles

(layer)

endoneurium

surrounds individual nerves

(structure)

nerve fascicle

(gray/dark blue structure)

nerve fiber

fibroblasts

elongated nuclei located in the endoneurium

(structure)

node of ranvier

(fiber type)

nerve fiber

notice how it is wavy

lamellar corpuscle

nerve ending responsible for sensitivity to vibration and pressure

in skin, mesentery, joints, and some abdominal organs

has a non-myelinated axon of a sensory neuron in the center

(type of cell)

(in the pancreas)

ganglion cells

(type of cell/tissue)

sympathetic ganglia

ganglion cells

(type of cell)

sympathetic ganglia

dorsal root ganglia

ganglion cells of dorsal root ganglion

nerve cells of dorsal root ganglion

(structure)

dorsal horn of the spinal cord

sensory input

(structure)

ventral horns of spinal cord

motor output

(structure)

central canal of spinal cord

(tissue type in circled area)

gray matter

synapses only

(tissue type in indicated area)

white matter

(darker structures)

cell body of motor neurons

ventral horn

node of ranvier

schwann cells

oligodendrocyte

cell body of a neuron