Post on 17-Jan-2016
transcript
Lab#1Microscopy
&Epithelial Tissue
Lama AlAbdiSupervised by: Dr.
Reem AlAjmi
Genera!y, It is an instrument used to examine andmonitor objects we can’t see with the naked eye.It has many applications.
Microscope
There are different classes and types of microscopes dependingon the magnification power, their applications, and how theyare operated:Transmission electron microscope (TEM).Scanning electron microscope (SEM).Inverted microscope.Light (compound) microscope.
Types of microscopes
The compoundmicroscope is made of 3systems:The mounting andmovement System.The magnificationSystem.The i!umination System.
Compound Microscope
The mounting and movement system
The body tube:carries the ocular lenses
The arm:Supports and connects theupper part of the microscope
The coarse focusing knob:for stage movementThe fine focusing knob:for image sharpness
The nose piece:Carries the objective lenses andmove them accordingly above thestageThe stage:Horizontal platform upon whichthe slide of interest rest
The base:Supports the microscope
The ocular lenses:5X, 10X, and 15X
The objective lenses:Scanning lens: 3.5X or 4X or 5XLow power lens: 10XHigh power lens: 40XOil immersion lens: 100X
THE MAGNIFICATION SYSTEM
How to calculate the magnification power?Magnification power = ocular lens xobjective lens.(e.g.) 10X x 40X = 400X hint: Don’t forget the unit
THE ILLUMINATION SYSTEM
The illuminator:light source
The iris diaphragm:controls the amount of lightreaching the slide
The condenser:collects and concentrate the light
THE EPITHELIAL TISSUE
Prepared by : Reem Aldossari
Lab 2ZOO 103
Types of Epithelial Tissue
•Epithelial tissue can be divided into two groups depending on the number of layers of which it is composes.
simple epithelium: which consist of only
one layer
squamous epithelium
cuboidal epitheliu
m
columnar epithelium
StomachIntestineCollecting tubule
Thyroid gland
Lining of MouthTop view
Bowman’s capsuleSide view
stratified epithelium:
which consist of more than
one layer
( Squamous,cuboidal,columnar)Skin of Toad
( Frog )
Covering “surface” epithelium
.
Glandular
epithelium
Neuro_epithium
Types of Epithelial Tissue
•The Simple.•Stratified.
epithelium of cells
specialized to
produce secretion.
(Goblet cell)
•Epithelial tissue can be divided into two groups depending on their function of which it is composes.
Squamous epithelium
Simple Cuboidal Epithelium
Simple Columnar Epithelium
1
2
Glandular Epithelium
Stratified sequamous epithelium in skin keratinized and non keratinized
Stratified cuboidal epithelium in sweat gland
Thank you for your attention