6658867
Description
Mind Map by Nadine Egan, updated more than 1 year ago
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Created by Nadine Egan
over 7 years ago
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Cell structure and The
Microscope.
- The Microscope.
- The Parts Of The Microscope.
- Eyepiece or Ocular lens: An
eyepiece is a magnifying lens
attached to the microscope
which helps in magnifying the
sample object. It is called an
eyepiece as we need to place
our eye near it in order to see
the magnifying image of the
sample.
- Arm: The arm is the part of
microscope that connects to the
base and helps carry the
microscope easily. One can hold
the arm with on hand and put
another hand under the base of
the microscope so that it can be
carried easily.
- Stage: A stage is an indispensable
part of the microscope. It is a flat
surface where the slide with the
specimen is placed. A mechanical
stage is a stage used when working
with higher magnifications. It is
moved by using knobs as even the
slightest moment can affect the
results.
- Objective lens: Objective lens is
the part of microscope
responsible for magnifying the
image of specimen. Usually
there are three objective lenses
in a standard microscope of
10X, 40X and 100X. Depending
upon the aim of study and
nature of the specimen, the
most suitable objective lens can
be brought to use.
- Coarse adjustment knob: A coarse
adjustment knob is a knob present on the
arm of a microscope. The main function of
this knob is to move the specimen back or
forth to adjust the slide containing
specimen in order to bring it to focus and
show the best image possible. The coarse
adjustment should be carefully moved
and adjusted to attain desired results.
- Fine Adjustment Knob: This
knob is a sub part of the
Coarse adjustment knob. It is
used to bring the specimen
into sharp focus.
- Eyepiece or Ocular lens: An
eyepiece is a magnifying lens
attached to the microscope
which helps in magnifying the
sample object. It is called an
eyepiece as we need to place
our eye near it in order to see
the magnifying image of the
sample.
- Plant cell
- Its main function is storage. Vacuoles are
found in the cytoplasm of most plant cells.
They are membrane bound organelles,
they perform functions of secretion,
excretion and storage. Tonoplast: A
vacuole that is surrounded by a membrane
is called tonoplast.
- Animal cell
- Some cells have more than
one nucleolus. nucleus -
spherical body containing
many organelles, including
the nucleolus. The nucleus
controls many of the
functions of the cell (by
controlling protein synthesis)
and contains DNA (in
chromosomes). The nucleus is
surrounded by the nuclear
membrane.
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