Epithelial Tissue Histology

Flashcards generated from lecture notes on Epithelial Tissue Histology.

Başluk

Cavity, Jassa, lumen referring to argic gaps.

Doku

Similar cells with same structure and function come together to form…

Epitel Doku

Covers body surface, lines body cavities, and forms glands.

Bağ Doku

Supports other tissues structurally and functionally.

Kas Doku

Composed of contractile cells and supports movement.

Sinir Doku

Controls body activities with stimuli received from inside and outside.

Ektoderm, Mezoderm, Endoderm

Trilaminar germ layer consists of…

Ektoderm

Oral and nasal mucosa, cornea, epidermis of the skin.

Mezoderm

Epithelium of male and female reproductive system, endothelium of the circulatory system, mesothelium covering body cavities.

Endoderm

Epithelium covering the respiratory system, epithelium covering the gastrointestinal system.

Epithelia Tissue

Covers the body surface, lines the cavities of the organs and body cavities, and forms glands.

Polarity

Apical, basal, and lateral faces, basal membrane, specialized cell connections, avascular, and renewable.

Function of Epithelial Tissue

Protection-Barrier, absorption, secretion, contractility, filtration, receptor/sensory reception, transport.

Örtü Epiteli (Covering epithelium)

Epithelium that surrounds the body, lines the inner surface of luminal organs, and covers the inner surface of body cavities.

Bez Epiteli (Glandular epithelium)

Epithelium that makes secretions.

Lamina Propria

Connective tissue layer found underneath the epithelium lining the lumens of internal organs.

Tek Katli

Single layer of cells

Çok Katli

Two or more layers of cells

Yassi

Cell width is greater than height.

Kübik

The width, height, and depth of the cell are approximately the same.

Prizmatik-Silindirik

Cell height is greater than width.

Yalancı Çok Katlı

Arrangement where all cells rest on the basal membrane but not all reach the lumen.

Tek Katlı Yassi Epitel found

Endothelium: inner surface of cardiovascular and lymphatic vessels. Mezothelium: inner surface of body cavities like the thorax, pericardium, and abdominal cavity.

Tek Katlı Kübik Epitel found

Kidney tubules, thyroid follicles

Tek Katlı Prizmatik Epitel

Siliated, microvillus

Non-keratinize Çok Katlı Yassı Epitel

Oral cavity, pharynx, esophagus, cornea, urethra, vagina.

Keratinize Çok Katlı Yassı Epitel

Skin.

Çok Katlı Kübik Epitel

Large excretory ducts of sweat and salivary glands.

Çok Katlı Prizmatik Epitel

Anterior part of the eye up to the cornea and the inner surfaces of the eyelids.

Çok Katlı Değişici Epitel

Ureter, upper part of the urethra, and the inner surface of the bladder, also called Urotelium

Apikal Yüz

Microvilli, kinosilya, stereocilia.

Mikrovillus (found in)

Kidney, small intestine

Kinosilya (found in)

Respiratory and female genital tracts.

Sterosilya (found in)

Ductus epididymis, ear sensory cells.

Mikrovillus

Observed in cells that transport fluids and absorb metabolites, increase the surface area.

Motil Silyumlar

Most common type, actively motile thanks to motor proteins

Primer Silyumlar (monosilyum)

Present in most eukaryotic cells, 1 per cell, passively motile, lacking motor proteins.

Nodal Silyumlar

Found in the embryonic period, actively motile thanks to motor proteins and perform rotational movement.

Sterosilya

Long (120 micron) immotile microvilli. (stereovillus)

Epithelial Cell Lateral Surface Differentiation

Tight junction, intermediate junction, desmosome, gap junction, lateral extensions.

Zonula Okludens

Tight junction, occluding junction, prevent the lipids and proteins of the cell membrane.

Zonula Adherens

Adhesive junction, provides a strong and stable connection.

Makula Adherens (desmozom)

Forms strong connection points, strengthens the tissue

GAP junction (neksus- oluklu bağlantı)

Allows the movement of ions or signal molecules between cells, intercellular communication

Lateral Uzantılar (İnterdigitasyonlar)

Allows the passage of intercellular substances, abundant in cells with intense substance transport.

Hemidesmozomlar

Anchors the cell skeleton to the basal lamina

Bazal Membran

Mediates for the nutrition of the avascular epithelial tissue, stained with silvering and PAS for light microscopic examination.

Lamina lusida (lamina rara)

Contacted to the epithelial cells

Lamina densa

Contacted to the connective tissue

Retiküler Lamina

Contains fibroblasts, type I and type III (reticular) and type VII collagen fibers.