Histology
Histology is the microanatomy method and a branch of biology that studies the anatomy of tissues. It includes viewing tissue in a magnified view under the microscope. Microanatomy also includes the process of study of organs called organology and the study of cells called cytology. Histopathology is a branch of biology that includes microscopic identification of diseased tissue. The field of histology comprises the preparation of the tissues and collection of cells as specimens for examination under the microscope. These processes are done by technicians like histologists, histotechnicians, and biomedical scientists. Histopathology is the diagnosis and research of tissue diseases that require the examination of tissues and/or cells under a microscope. Histopathologists are in charge of determining tissue diagnosis and assisting clinicians in managing a patient's care.
Endocrine System
Human body functions due to the collective work of the organ systems. One of them is the endocrine system. It is a chemical messenger system constituting the hormones directly released by the endocrine glands into the circulatory system. The study of this system is known as endocrinology. The word 'endon' means inside, and 'crine' means secrete, making the word "endocrine."
![Instructions
Cheek cells are the major cell type of the epithelial tissue
lining the inside of your mouth. This epithelium is composed
of many layers of thin, flattened cells. Perform the following
steps to make a wet mount of these cells in order to identify
the three major components of a typical eukaryotic cell.
1. Place a drop of saline solution on a microscope slide.
2. Carefully scrape the inside of your cheek with the blunt
end of a toothpick.
3. Place the cheek scrapings in the drop of saline solution
on the slide and stir with the toothpick.
4. Add a drop of methylene blue to the drop of saline and
stir again.
5. Place a coverslip over the drop on the slide. Use the
folded edge of a piece of paper towel to absorb any
excess fluid.
6. Place the slide on the microscope and observe the
scrapings at low
power. Switch to
the high-power
objective and
examine the scrap-
ings more closely
(Figure 5-4).
7. Make a sketch of
the epithelial cells
that you observe.
On your sketch
label the plasma
membrane, the
nucleus, and the
Mat
O C
Instr
1. I
cytoplasm.
Total magnification:
3.
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