Blue - Nerve cell body

Red - Nerve cell fibers

Green - Glial cell nuclei

[image][image][image]

Green and blue arrows?

Portion of a nerve in cross section.

Green: Nerve fiber

Blue:  myelin sheath

[image]

Yellow, white and red arrows?

Cross section of a nerve fiber

Yellow: Schwann cell nucleus

White: perineurium

Red: epineurium  

Portion of nerve in longitudnal section

Green: Myelinated fiber

Blue: myelin sheath

Yellow: node of Ranvier 

[image]

Dorsal root ganglion with sensory (afferent) neuron cell bodies.

The neuron cell bodies (green arrows) are characteristically round and many have prominent nuclei. Small satellite glial cells surround each neuron cell bodies.

Blue: dura mate

Yellow: arachnoid matter

Green: subarachnoid space with arachnoid trabechulae

Red: pia mater

Red arrow: White matter; peripheral, consists of myelinated nerbe fibers associated with glial cells

Blue arrow: Grey matter; central, contains nerve cell bodies, glial cells and neuropil

Pink arrows: Perkunje cells

Yellow: molecular layer

Green: granular layer

Transverse section through wall of aorta - elastic artery

Black: tunica intima

Blue: tunica media

Green: tunica adventitia

Muscular arterie

Black: nucleus of endothilial cell

Blue: tunica intima

Green: tunica adventitia

Arteriole

White: endothelial cell

Black: smooth muscle cell of tunica media

Transverse section of capilary

White --> RBC

Yellow: endothelial cel

Lymphatic vessicle

Note the extremely thin wall, irregular shape, and absence of red blood cell

E: epimysium

P: perimysium

F: fascicle

Green arrow: single muscle cell, cut in cross-section.

Skeletal muscle cells with striations

note location of periphrial nuclei

Cardiac muscle cells

Most nuclei (green arrow) are surrounded by cytoplasm. The cytoplasm adjacent to the nucleus is less eosinophilic because there are few myofibrils there. Cells are mechanically and electrically coupled at intercalated disks (yellow arrow).

Smooth muscle cells of the small intestine

Nuclei of cross sectioned (green arrow) and longitudinally sectioned (yellow) smooth muscle cells

Primary ossification center in diaphysis

(Secondary ossification centers will form in the epiphyses)

Yellow: Endosteum which  lines internal bone surfaces. In this example its cells are osteoblasts

Green arrow: Osteocytes reside in lacunae in this bone trabecula

Elastic cartilage

Yellow: Chondrocytes in lacunae

Green: elastic fibers

Dense regular connective tissue

Arrows indicate colalgen fibers

Plasma cells

Oval cells with spherical nuclei and very basophilic nuclei with pale golgi zone

Marcophage

Large cell with irregular surface usually has evidence of phagocytosis (debris) in cytoplasm

[image] 

What type of epithilium is this?

[image]

Elastic Artery

Arrow = Vasa Vasorum

[image]

1. Endocardium (inner)

2. Myocardium (makes up mass of heart)

3. Epicardium (outer)

Similar to the tunica intima; lined by endothelium.

Deep to that is some fibroelastic tissue, a little smooth muscle, then connective tissue (subendocardium) that binds it to the myocardium

Middle layer of heart

Bundles of cardiac muscle fibers

Separated by connective tissue and a blood vascular supply

Outer layer is mesothelium

Deep to mesothelium is fibroelastic connective tissue, adipose tissue, blood vessels, and nerves

[image]

What is this?

What protein is it made of?

How does it connect to cytoskeleton

Microvilli

Actin

Terminal web

[image]

What does red arrow point to?

What is it made of?

How does it attatch to cytoskeleton?

Cilia

Microtubules

Basal body

Microtubules 9+2

Motile cilia

Left: lamina lucida

Middle: hemidesmosome - anchors cell to BM

Right Lamina densa

[image]

What is top junction?

Tight junction

[image]

What is middle junction?

What protein is it made of?

Zona adherens

Actin filaments

[image]

What is bottom junction?

What protein makes it up?

What morphological characteristic helps you tell it apart from other junctions?

Desmosome - cell-cell attachment

Intermediate filaments

Line down middle - zona adherens (above) do not have a line

Hemidesmosome

cell-basement membrane attatchment

[image]

What is this?

What protein is it made up of?

Desmosome

Cadherin and intermediate filaments

Cell-cell attatchment

[image]

cross section of  myelinated axon 

Black outer = schwann cell wrapped around axon

3 - microtubules

2 - neurofilaments

Red - cell body

blue - satellite cells

Auerbach's plexus

Fibers from ganglia in spinal cord to ganglia in the wall of GI tracts where they synapse with neurons localized in ganglia between muscle layers