Parts of the microscope are:
1. Eyepiece or ocular. This what you look through at the top of the microscope.
2. Eyepiece tube. Holds the eyepiece in place
3. Objective lens. The primary optical lenses on a microscope ranging from 4x to 100x magnification power.
4. Nosepiece. Houses the objective.
5. Coarse and fine focus knobs. They are used to focus the microscope.
6. Stage. This is a ledge where the specimen to be observed is placed.
7. Stage clips. Clips on the stage that hold e.g. a glass slide on which the specimen has been mounted.
8.Aperture. The hole in the stage through which transmitted light from the base reaches a specimen placed on the stage for observation.
9. Illuminator. This is the light source for a microscope usually located in the base of the microscope.
10. Condensor. Is used to collect and focus the light from the illuminator on to the specimen. It is located immediately under the stage.
11. Iris diaphragm. This is a flexible structure that controls the amount of light reaching the specimen and is located above the condenser and below the stage.
12. Condensor focus knob. Moves the condenser up and down to control the light focus on the specimen.
13. Base. This is the foot of the microscope and supports the whole frame of the microscope.
<u>Answer:</u>
Blastocyst is a structure that subsequently forms the embryo during the process of fertilization.
<u>Explanation:</u>
- In the "innermost layer of the uterine wall" there is endometrium layer, this is where the uterus does the embryo implant.
- The blastocyst stage is the period of embedding the "lining of the uterus".
- But the fertilization of egg is done in the "Fallopian tube" and is later implanted in the uterus.
- Hence blastocyst is the lining structure of the uterus as the implantation of embryo occurs.
