The microscope Care and use of the microscope-- Be familiar
with parts of the microscope. For example--Identify following
parts: Rotating nosepiece, Condenser, and Iris diaphragm (See next
slide) 3
Slide 4
4
Slide 5
ID the component of a microscope 1.______ used for precise
focusing once initial focusing has been done 2.______ delivers a
concentrated beam of light to the specimen 3.______ carries the
objective lenses; rotates so that the different objective lenses
can be brought into position over the specimen 4.______ Used to
increase the amount of light passing through the specimen 5.______
platform on which the slide rests for viewing 5 Choose from:
A--condenser; B--fine adjustment knob; C--iris diaphragm;
D--mechanical stage; E-- nosepiece Practice01
Slide 6
Viewing objects through microscope 1.Move the slide to the
left. In what direction does the image move? 2.Away from you move
toward you 3.Draw e on a slide What would the image look like in
the low-power field? 4.Draw k on a slide Image? 5.Total
magnificationpower of the ocular lens multiplied by the power of
the objective lens used. 6
Slide 7
Practice questions on microscopy 1.The distance from the bottom
of the objective lens in use to the specimen is called the ___.
2.The area of the specimen seen when looking through the microscope
is the ____. 3.Assume there is an object on the left side of the
field that you want to bring to the center. In what direction would
you move your slide? 4.If, after focusing in low power, only the
fine adjustment need be used to focus the specimen at the higher
powers, the microscope is said to be _______. 5.If a microscope has
a 10X ocular and the total magnification at a aprticular time is
450X, the objective lens in use at that time is _____X. 7
Practice02
Slide 8
Exercise 4 (Epithelial Tissue) 8
Slide 9
Review 9
Slide 10
10
Slide 11
11
Slide 12
Simple Epithelia 12
Slide 13
1. Simple squamous epithelium Locations-- air sacs of lung,
inner lining of blood vessels, lining of peritoneum, serous
membrane of stomach and small intestine 13
32 5A. Keratinized Stratified Squamous Layers of epithelium
covered with compact, dead squamous cells (no nuclei) packed with
protein keratin Retards water loss, prevents entrance of organisms
Forms epidermal layer of skin (esp. soles and palms) Fig. 5.8 Skin
fromthe sole of the foot
Slide 33
33
Slide 34
34 5B.Nonkeratinized Stratified Squamous Multilayered
epithelium that lacks surface layer of dead cells forming moist,
slippery layer Locations: tongue, oral mucosa, esophagus &
vagina Epithelial layer Fig. 5.9 Mucosa of the vagina
Slide 35
35
Slide 36
6. Stratified cuboidal epithelium Locations Sweat gland ducts,
ducts of the esophageal gland, follicles of ovaries, seminiferous
tubules of testis 36
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37
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40
Slide 41
41 6. Stratified Cuboidal Epithelium (Structure) Two or more
layers of cells; surface cells square or round (Functions)
Secretion and production (Locations; ducts of) Sweat gland, ovarian
follicles Fig. Ovarianfollicles
Slide 42
7. Stratified columnar epithelium Locations Male urethra and in
ducts of some large glands 42
Figure 6.1 ID#16 Name the major function of this structure
(circled). 88
Slide 89
ID#17 ID this specific type of receptor (circled) and name its
function in the skin. 89
Slide 90
Figure 6.1 ID#18 ID this connective tissue layer braced in
black ink below. 90
Slide 91
ID#19 -- ID this layer (pale appearance) that is indicated by
the red arrow and the red brace. ID#20 -- ID this layer (dark brown
color) that is indicated by the black arrow and the black brace.
The epidermis 91