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Michael James Denham White FRS [1] (London, 20 August 1910 – Canberra, 16 December 1983) [2] was an Australian zoologist and cytologist.. White grew up in Tuscany, Italy, where he was home-schooled, [3] before beginning undergraduate studies at University College London from 1927.
Some animals may experience vaginal secretions that could be bloody. The female is not yet sexually receptive; the old corpus luteum degenerates; the uterus and the vagina distend and fill with fluid, become contractile and secrete a sanguinous fluid; the vaginal epithelium proliferates and the vaginal cytology shows a large number of non ...
Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [ 1 ] [ 2 ] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [ 3 ]
Vaginal cytology is a microscopic examination of cells from the vaginal epithelium.In veterinary medicine, it helps differentiate the stages of the mammalian estrous cycle because the vaginal epithelium changes in response to sex hormone levels; practically, it is used to distinguish when a female canine is at a particular point in the estrous cycle. [1]
Sir James Gray, CBE, MC, FRS [1] (14 October 1891, London – 14 December 1975, Cambridge, England) was a British zoologist who helped establish the field of cytology. Gray was also known for his work in animal locomotion and the development of experimental zoology. He is known for Gray's Paradox concerning dolphin locomotion. [3] [4] [5] [6]
Cytology has contributed to tracking the evolutionary history of many organisms, especially primates and flowering plants. As example, karyotype comparisons have largely clarified the evolution of Arabidopsis thaliana [ 3 ] and of saffron crocus , [ 4 ] though there are many more studies that deserve highlighting.
Polyploidy in animals is much less common, but it has been significant in some groups. [43] Polyploid series in related species which consist entirely of multiples of a single basic number are known as euploid. Haplo-diploidy, where one sex is diploid, and the other haploid. It is a common arrangement in the Hymenoptera, and in some other groups.
For example, zoology is the study of animals, while botany is the study of plants. Other life sciences focus on aspects common to all or many life forms, such as anatomy and genetics. Some focus on the micro-scale (e.g. molecular biology, biochemistry) other on larger scales (e.g. cytology, immunology, ethology, pharmacy, ecology).