Bio 150

supports the microscope

• located in the base
• light passes up through the stage and through the specimen

• the platform the slide rests on while being viewed
• always has a hole in it to permit light to pass through both it and the specimen

• spring clips or clamp style, hold the slide in position for viewing
• permits precise movement of the specimen

• Concentrates the light on the specimen
• Best Postion - is close to the inferior surface of the stage

raises and lowers the condenser to vary the delivery of light

arm attached to the condenser that regulates the amount of light passing through the condenser

used to focus the specimen

• used for more precise focusing
• after course focusing is completed

supports the objective lenses which are mounted on the movable nosepiece and the ocular lens

• vertical portion
• connects the base and head

• lens contained at the superior end of the body tube
• magnifies the specimen 10x

adjustable lens system that permits the use of

• low power lens
• high powers lens
• oil immersion lens

each have different magnifying powers

• low power 10x yellow band
• high power 40x blue band
• oil immersion 100x black & white bands

when you rotate the low power objective into position -

• Turn the course adjustment knob
• Moves fast up and down

• Turn the fine adjustment knob
• moves slow up and down

never use course adjustment knob with high power - will crack the lens

Specimen beign viewed is equal to the power of ocular lens * the power of the objective lens used

• Low Power 10*10= 100x
• High Power 10*40= 400x

oil Immersion

• when viewing in the microscope - the slide will be upside down
• when moved away from you - the image moves toward you
• when you slide to the left - image moves right

• without touching the focusing knobs
• It should be in focus in high power if properly focused in low power

• in high power - should be larger
• 1/3 to 1/4 of it should be visible in magnification

basic structual and functional unit of your body

• cuboidal
• chondrocryte
• muscle
• neuron

a group of similar looking cells with a common function

• epithelium
• connctive
• skeletal
• nervous

covers the body surface, lines its internal cavities and forms glands

• cell - cuboidal
• tissue - epithelium

• cell - chondrocyte
• tissue - connective

• cell - muscle
• tissue - skeletal

• cell - neuron
• tissue - nervous