2ND YEAR MBBSHISTOLOGY SLIDES WITH IDENTIFICATION POINTS

CREATED BY:

UMER SALMAN (N-61)NISHTAR MEDICAL COLLEGE, MULTAN.

SPECIAL THANKS TO MOHAMMAD NASIM ALAM (N-61)

APPENDIX

• Constant mucosal folds

• Ring of lymph nodules

• No taenia coli

• Fewer crypts

• Indistinct muscularis mucosa

COLON

• No villi

• Taenia coli

• Much more goblet cells

CORNEA

• Five layers can be identified

• Stratified squamous epithelium

• Homogenous Structureless Bownman’s membrane

• Substantia propria

• Desment’s Membrane

• Simple low cuboidal endothelium

No Blood Vessels present.

DUCTUS DEFERENS

• Irregular Convoluted single lumen

• Low columnar pseudostratified epithelium with stereocilia

• Very thick (3 layered) muscularis

DUODENUM

• Leaf-shaped villi with microvilli

• Brunner (submucous) glands

• Less number of goblet cells

EPIDIDYMUS

• Regular lumen

• Pseudostratified epithelium with stereocilia

• No fibromuscular stroma

• No fibrosa

ESOPHAGUS

Stratified squamous non keratinized epithelium

Thickest muscularis mucosa

Longitudinal Mucosal fold

Submucosal glands

Mixed skeletal and smooth muscles

GALL BLADDER

• Mucosal folds

• No muscularis mucosa

• Fibromuscular layer

• Perimuscular layer

• Absence of goblet cells and crypts of Liberkuhn

ILEUM

• Presence of Peyer’s patches

• Maximum goblet cells seen

• Presence Club shaped villi

JEJUNUM

• Club shaped or round villi with microvilli

• Tallest vulvulae

• More goblet cells

• No Brunner glands

KIDNEY

• Cortex contains glomeruli, convoluted tubules and medullary rays

• Medulla contains renal pyramid, loop of Henle and collecting tubule

LIP

• Dermal Papillae along the foldings

• Stratum Lucidium forming the Red Area of the lips (containing Blood vessels)

• Core of skeletal muscles

• Labial Salivary glands

LIVER

• Hepatic lobule with central vein

• Radiating plates of hepatocytes

• Hepatic sinusoids

LUNG

• Serosa

• Alveoli (lined by simple squamous epithelium)

• Bronchioles and bronchi

MAMMARY GLAND

• Developed Lactiferous ducts

• Alveoli of various shapes and sizes

• Alveoli full of (milk) secretions

OVARY

• Mesovarium

• Ovarian Follicles

• Cortex and Medulla

PANCREAS

• Pancreatic serious acini with obliterated lumen

• Islets of Langerham

PAROTID GLAND

• Serious Acini

• Interlobular ducts

• No serious demilunes

• Striated ducts

PENIS

• Corpus Cavernous

• Corpus spongiosus

• Deep artery of Penis

PINNA

• Elastic cartilage with perichondrium

• Stratified squamous keratinized epithelium

• Hair follicles

• Sweat glands, sebaceous glands

PITUITARY GLAND

• Anterior lobe – Cords of glandular cells separated by capillary sinusoids. Acidophils and basophils present.

• Posterior lobe – Nerve fibers with capillaries

• Pars intermedia – Colloids filled vesicles

PROSTATE GLAND

• Fibromuscular true capsule

• Prostatic acini (lined with simple columnar epithelium) with corpora amylacea

• Fibromuscular Stroma

• Prostatic urethra

RETINA

• 10 layers can be recognized

• Rods and cones

• Pigment epithelium

SEMINAL VESICLE

• Highly convoluted lumen with crypts and cavities

• Pseudostratified epithelium

• Thin Muscularis

STOMACH

• Gastric pit is prominent along the epithelium

• Long tubular glands in mucosa

• Dispersed smooth muscles in muscularis externa

SUBLINGUAL GLAND

• No capsule

• Mucous acini with few serious one

• Few serious demilunes

• No Intercalated ducts

SUBMANDIBULAR GLAND

• Mixed albeoli

• Many serious demilunes

• Shorter and narrower intercalated ducts

• Numerous intralobular ducts

SUPRARENAL GLAND

• Cortex and Medulla

• Pyramidal cells arranged in Rounded clusters – Called Glomerulus

• Three zones visible in cortex

• Glomerulosa

• Fasciculata

• Reticularis

TESTIS

• Tunica albuginea and tunica vasculosa

• Seminigerous tubules with spermatozoa

• Groups of Leydig cells

THYROID GLAND

• Characteristic follicles with pink colloid

• Very thin interfollicular stroma with parafollicular cells

• Numerous Capilaries

TONGUE

• Conical Shaped

• Lingual Papilla

• Muscularis-fasciculi of skeletal muscles

• Anterior lingual glands

• Lingual tonsil

TRACHEA

• Pseudostratified ciliated columnar epithelium

• C-shaped hyaline cartilage

• Trachealis muscle

• Tracheal glands

URETER

• Star Shaped small lumen

• Translational Epithelium

• No muscularis mucosa

• Inner longitudinal and outer circular smooth muscles

URINARY BLADDER

• Transitional epithelium

• Thick lamina propria

• Slide consists of a part of baldder wall so lumen is not evident

• Very thick (3 layered) Muscularis

• No glands, no submucosa

UTERINE TUBE

• Fimbria

• Mucosal folds lined by simple columnar ciliated epithelium

• Layered muscularis in isthmus

UTERUS

• Simple columnar epithelium (partially ciliated)

• Very Broad lamina propria

• Uterine glands in lamina propria

• No submucosa

• Very thick muscularis

• Only one stage of menstrual cycle is evident

VAGINA

• Stratified squamous non-keratinized epithelium

• Very broad richly muscular lamina propria

• No Mucosal folds

• No submucosa

• No glands

• Thick muscular layer with very vascular interstitial connective tissue

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