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Last edited by
Iwaqarhashmi (
talk |
contribs) 3 seconds ago. (
Update) |
Anucleate cells are cells that lack a nucleus. This feature is relatively rare in the animal kingdom but can be found in some specialized cells and pathological conditions.
Examples in Human Biology
Red Blood Cells (Erythrocytes)
The most well-known example of anucleate cells in humans are the mature red blood cells (erythrocytes). During their development in the bone marrow, these cells undergo a process called enucleation, where they expel their nucleus. This adaptation allows for more space to be occupied by hemoglobin, thus enhancing the cell's ability to carry oxygen throughout the body. The absence of a nucleus also contributes to the biconcave shape of red blood cells, which is essential for their flexibility and efficiency in gas exchange
Platelets (Thrombocytes)
Platelets are another type of anucleate cell in the human body. They are small cell fragments derived from the cytoplasm of megakaryocytes in the bone marrow. Platelets play a crucial role in blood clotting and wound healing processes.
Anucleate Cells in Pathology
Ghost Cells
Ghost cells are found in certain pathological conditions, such as pilomatricomas and calcifying odontogenic cysts. These cells have lost their nuclei and cytoplasmic contents, leaving behind only the cell membrane and sometimes remnants of the cell's structure. The presence of ghost cells can be an important diagnostic feature in histopathology.
Other Conditions
Anucleate cells can also be found in other specific tumors and cysts, including craniopharyngiomas, cemento-ossifying fibromas, and odontomas. The loss of the nucleus in these cells often indicates a form of degeneration or abnormal differentiation.
Advantages and Disadvantages
The absence of a nucleus in anucleate cells comes with both advantages and disadvantages. For example, the lack of a nucleus in red blood cells allows for more hemoglobin content and flexibility, but it also means these cells cannot repair themselves or synthesize new proteins, leading to a limited lifespan of about 120 days.
Related Concepts
References
External Links
| Cell biology |
|---|
Anatomy and
morphology | ||
|---|---|---|
| Fields |  | |
| Bacteria and fungi | ||
| Protists | ||
| Plants | ||
| Invertebrates | ||
| Mammals | ||
| Other vertebrates | ||
| Glossaries | ||
| Related topics | ||
| Draft article not currently submitted for review.
This is a draft Articles for creation (AfC) submission. It is not currently pending review. While there are no deadlines, abandoned drafts may be deleted after six months. To edit the draft click on the "Edit" tab at the top of the window. To be accepted, a draft should:
It is strongly discouraged to write about yourself, your business or employer. If you do so, you must declare it. Where to get help
How to improve a draft
You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Editor resources
Last edited by
Iwaqarhashmi (
talk |
contribs) 3 seconds ago. (
Update) |
Anucleate cells are cells that lack a nucleus. This feature is relatively rare in the animal kingdom but can be found in some specialized cells and pathological conditions.
Examples in Human Biology
Red Blood Cells (Erythrocytes)
The most well-known example of anucleate cells in humans are the mature red blood cells (erythrocytes). During their development in the bone marrow, these cells undergo a process called enucleation, where they expel their nucleus. This adaptation allows for more space to be occupied by hemoglobin, thus enhancing the cell's ability to carry oxygen throughout the body. The absence of a nucleus also contributes to the biconcave shape of red blood cells, which is essential for their flexibility and efficiency in gas exchange
Platelets (Thrombocytes)
Platelets are another type of anucleate cell in the human body. They are small cell fragments derived from the cytoplasm of megakaryocytes in the bone marrow. Platelets play a crucial role in blood clotting and wound healing processes.
Anucleate Cells in Pathology
Ghost Cells
Ghost cells are found in certain pathological conditions, such as pilomatricomas and calcifying odontogenic cysts. These cells have lost their nuclei and cytoplasmic contents, leaving behind only the cell membrane and sometimes remnants of the cell's structure. The presence of ghost cells can be an important diagnostic feature in histopathology.
Other Conditions
Anucleate cells can also be found in other specific tumors and cysts, including craniopharyngiomas, cemento-ossifying fibromas, and odontomas. The loss of the nucleus in these cells often indicates a form of degeneration or abnormal differentiation.
Advantages and Disadvantages
The absence of a nucleus in anucleate cells comes with both advantages and disadvantages. For example, the lack of a nucleus in red blood cells allows for more hemoglobin content and flexibility, but it also means these cells cannot repair themselves or synthesize new proteins, leading to a limited lifespan of about 120 days.
Related Concepts
References
External Links
| Cell biology |
|---|
Anatomy and
morphology | ||
|---|---|---|
| Fields | | |
| Bacteria and fungi | ||
| Protists | ||
| Plants | ||
| Invertebrates | ||
| Mammals | ||
| Other vertebrates | ||
| Glossaries | ||
| Related topics | ||