Exam 2 - Powerhouse Review

Elastic cartilage H&E

Transitional epithelium (urothelium)

Arrows denote microglia nuclei

Stratified columnar epithelium

Pseudostratified columnar epithelium

Reticular fibers - silver impregnation

Peripheral nerve cross section

Simple cuboideal epithelium

Sensory ganglion - pseudounipolar neurons and satellite cells

Vessel, endothelium (a form of simple squamous epithelium)

Skeletal muscle, A band, I band

Pyramidal cell, cerebral cortex

Skeletal muscle, sarcomere, A band, I band, Z line.

Astrocyte

Spleen, Malpighian corpuscle that is a lymphatic follicle perforated by a central artery or arteriole

White adipose tissue

Old myocardial infarction - scar tissue replaced the cardiac muscle on the right. Below is the normal cardiac muscle.

Conducting system in the endocardium - Purkinje fibers. Enlarged fibers, vacuolated cytoplasm, high glycogen content, few myofibrils, cross striation. Left and right we can see the myocardium.

Smooth muscle cross section (left) and longitudinal section (right).

Wharton's Jelly

Loose connective tissue

Intramembraneous ossification. Osteoblasts line the bone trabecule

Plasma cells (arrow) at the bottom there is a lymphocyte

Smooth muscle

Lymph node, cortex and paracortex

Elastic fibers with resorcin-fuchsin

Spleen, Malpighian corpuscles that represent the white pulp surrounded by red pulp

Sickle cells

Cardiac muscle cross section. Note the vessels between the cells that appear like white gaps

Simple columnar epithelium with goblet cells.

Acute myocardial infarct - most of the nuclei disappeared from the cells (compare to the previous slide) - necrosis. Compare the image with slide 29.

Brown adipose tissue

Dense irregular connective tissue - type I. collagen fibers and fibroblasts. Submucosa.

Stratified squamous nonkeratinized epithelium.

Enchondral ossification, epiphyseal plate. Zone of resting cartilage, zone of proliferation, zone of hypertrophy and zone of ossification.

Palatine tonsil, high magnification, covered by stratified squamous nonkeratinized epithelium, lymphatic follicles.

Fibrocartilage, chondrocytes and type I. collagen fibers

Monocyte

Dense irregular connective tissue - type I. collagen fibers and fibroblasts. Submucosa.

Lymph node

Dense regular connective tissue - type I. collagen fibers and fibroblasts. Tendon.

Hyaline cartilage H&E

Skeletal muscle, cross section

Elastic cartilage, resorcin-fuchsin. Epiglottis.

Sebaceous gland - holocrine secretion.

Fibrocartilage, chondrocytes and type I. collagen fibers

Bone, lamellary systems. Haversian and interstitial lamellae, osteocytes between them.

Cardiac muscle, intercalated discs.

Osteoclasts, resorption bay.

Apocrine secretion in the mammary gland

Large lymphocyte, basophils and neutrophil granulocyte

Osteocytes

Stratified squamous keratinized epithelium. Skin.

Nerve longitudinal section. Note the myelin sheath and the node of Ranvier.

Salivary gland, serous and mucous acini and serous demilunes (artifact). Merocrine secretion.

Stratified cuboideal epithelium (sweat gland duct)

Hyperparathyroidism - numerous osteoclasts. Hypercalcaemia.

Polymyositis - a muscle fiber is surrounded by lymphocytes and macrophages that break down the fiber - autoimmune disease against the muscle fibers

Thymus, lobules, cortex, medulla. Capsule on the surface, vessels.

Osteomyelitis - lymphocytic aggregation next to a bone trabecule

Mastocyte next to a vessel

Multipolar cells spinal cord ventral horn

Purkinje cells, cerebellum

Oligodendrocyte, silver impregnation.

Palatine tonsil, stratified squamous nonkeratinized epithelium, crypts, lymphatic follicles.

Microglia

Ependymal cells covering the brain ventricles.

Neutrophil and eosinophil granulocyte

Medulla of the thymus, Hassal's corpuscle (formed by type 6 reticuloepithelial cells) and a vessel