Estrus - estrous cycle, Biology

Estrus - Estrous cycle

This is the period of heat, and copulation is permitted only at this time. This condition lasts from 9 to 15 hours and is characterised by a high rate of running activity. Under the influence of EPH, a dozen or more ovarian follicles grow rapidly: estrus is thus a period of heightened estrogen secretion. Behavioural changes include quivering of the ears, and lordosis (arching the back in response to handling or to approaches by the male). The uteri undergo progressive enlargement and become distended owing to the accumulation of luminal fluid. Many mitosis occur in the vaginal epithelium and as new cells accumulate, the superficial layers become squamous and cornified.

The latter cells ah exfoliated into the vaginal lumen, and their presence in vaginal smears is indicative of estrus. During late estrus, there are cheesy masses of cornified cells with degenerate nuclei present in the vaginal lumen, but few if any leukocytes are found during estrus. Ovulation occurs during estrus and is preceded by histologic changes in the follicle suggestive of early luteinisation. Much of the luminal fluid in the uteri is lost before ovulation.

Posted Date: 1/16/2013 11:25:18 PM | Location : United States







Related Discussions:- Estrus - estrous cycle, Assignment Help, Ask Question on Estrus - estrous cycle, Get Answer, Expert's Help, Estrus - estrous cycle Discussions

Write discussion on Estrus - estrous cycle
Your posts are moderated
Related Questions
Another possible way to classify organisms would be to separate them into unicellular and multicellular organisms. Explain why this is not a useful classification system. Other

Which statement is true of the energy levels of electrons in shells? A) All the electrons in an atom have similar amounts of energy. B) Electrons must lose energy to move from the

Define phases of the absorption of iron? The process of absorption is divided into three phases: i) Iron uptake by enterocytes (epithelial cell of the superficial layer of t

What are seed gums? What are its characteristic properties? Seed gums are a group of polysaccharides with the following properties: light to dark cream colored amorphou

two types of amoebas waste and how they get rid of them

Define Paediatric Problems and Nutritional Management? The process of accepting and digesting food in adequate amounts to meet nutrition needs is termed as feeding. Certain gro

What is the genetic condition in which the heterozygous individual has different phenotype from the homozygous individual? This situation is called lack of dominance and it can

what are protein? What is the constituential uni. Of protein? Briefly explain the various forms of protein?

Define the effects of Deficiency of Calcium in the Body? If there is a continued inadequate intake or poor intestinal absorption of calcium, plasma calcium concentrations will

What are some examples of biological activities in which osmosis plays an important role? Hemolysis (destruction of red blood cells) by entrance of water, the hydric regulation