Table of Contents
Cytology is the branch of biology and medicine concerned with the structure and function of animal and plant cells. But here we discuss human haploid cells (spermatozoon and ovum/egg), zygotes, blastomeres, bacterial cells, unicellular parasitic cells, yeasts, etc.
The human egg cell, also called ovum (plural ova) is a haploid cell having 23 chromosomes. It is the female reproductive cell, or gamete having a size of approximately 120 μm.
It is also called spermatozoon ( pleural spermatozoa) a motile sperm cell or moving form of the haploid cell (having 23 chromosomes) that is the male gamete. A spermatozoon unites an ovum to form a zygote.
Bacteria are single-celled microorganisms. The cell structure is simpler than that of other microbes as there is the absence of a well-defined nucleus or membrane-bound organelles and chromosomes composed of a single closed DNA circle.
Yeasts are eukaryotic, single-celled microorganisms that come under the fungus kingdom. Yeast cells of Candida are rounded to oval, 3–8 μm in diameter while Cryptococcus is 5 to 10 µm.
Introduction Colon cancer is a highly prevalent gastrointestinal malignancy originating from the inner lining (mucosal…
Introduction The Mycobacteria Growth Indicator Tube (MGIT) system is a high-throughput, automated method optimized for…
Introduction Leukemia (also spelled leukaemia) is a group of malignant hematological cancers originating in the…
Introduction Endometrial cancer is a malignancy that originates in the endometrium, the inner epithelial lining…
Introduction Melanoma is the most aggressive and invasive type of skin cancer. It originates from…
Introduction GI cancers originate within the human digestive system, spanning from the upper esophagus down…
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