Block EpitGland1

8/10/2019 Block EpitGland1

1/28

Block EpitGland

dr. Jan Tambayong, PHK


2/28

Skin


3/28

Skin layers


4/28

Skin layers


5/28

Skin layers


6/28

Resume

Stratum corneum: dead cells

The outermost part is called stratum disjunctum

Stratum lucidum: contains eleidinlux

Stratum spinosum: when pulled apart

spine-like

Stratum basale: mitotic layer; also called thestratum germinativum


7/28

Parotid gland


8/28

Parotid gland


9/28

Intercalated duct


10/28

Intralobular duct


11/28

Sublingual gland


12/28

Sublingual gland


13/28

Sublingual gland


14/28

Submaxillary gland


15/28

Pancreas (Serous gland)


16/28

Resume duct system of salivary glands

Intercalated duct

Low cuboidal or squamous cells

Intralobular duct (striated duct)

Cuboidal cells

Interlobular duct

Can be more than one layer of cells

Surrounded by much connective tissue


17/28

Supporting Connective Tissue

Supporting connective tissue:

Cartilage

Hyaline

Elastic

Fibrocartilago

Bone

Compact bone

Cancellous bone


18/28

Supporting Tissue

Cartilage

Avascular, no lymphatics or nerves

Nourished by diffusion of nutrients from

capillaries in perichondrium or by synovial fluid

from joint cavities.

Perichondrium: dense connective tissue. Joint

cartilage is devoid of perichondrium (nutrientsfrom synovial fluid).

Growth: interstitial + appositional


19/28

Hyalin Cartilage

Chondroblasts at theperiphery

Chondrocytes in lacunae

Homogenous matrix

Territorium: matrix

surrounding chondrocytes is

metachromatic due to

glycosaminoglycans

Nest/isogenous cells

A perichondrium present

Location


20/28

Elastic Cartilage

Location: auricle,

eustachian tube, epiglottis,

walls of external auditory

canal, the cuneiformcartilage of the larynx

Matrix appear dirty

(elastic fibers)

A perichondrium present


21/28

Fibrocartilago

Always between dense connective tissue andhyaline cartilage.

The border areas is not clear-cut.

Chondrocytes usually in rows or singly

separated by coarse collagen type I fibers

Location: intervertebral disks and symphysis

pubis

No perichondrium


22/28

Photomicrograph of Fibrocartilago

Note the rows of

chondrocytes separated

by collagen fibers.

Fibrocartilago isfrequently found in the

insertion of tendons on

the epiphyseal hyaline

cartilage.


23/28

Bones

Main constituent of adult skeleton

Supports fleshy structures, protects vital organs

(thorax, cranium), harbors the bone marrow.

Reservoir of calcium, phosphate, and other ions

Bone matrix with 3 cell types: osteoblasts (synthesize

organic components), osteocytes (in lacunae), and

osteoclasts (resorption and remodeling of bone

tissues).

A periosteum present


24/28

Bone

Long bone diaphysis

Showing haversian systems,outer and innercircumferential lamellae.

The protruding haversiansystem on the left showsthe orientation of collagenfibers in each lamella. Atthe right is a haversian

system showing lamellae, acentral blood capillary andmany osteocytes with theirprocesses.


25/28

Part of a haversian system

Note the numerouscanaliculi that permitcommunicationbetween lacunae and

the haversian canal. Inadjacent lamellae, thecollagen fibers areoriented in different

directions, whichprovide the bone withgreat strength.


26/28

Remodeling


27/28

Growing at the epiphyseal plate


28/28

Bone Repair

Documents

Block EpitGland1