Human ovum, Biology

Assignment Help:
  • A pair of ovaries are the reproductive organs in woman.
  • They are present just below the kidneys in the abdominal cavity.
  • Each ovary has several sac like structures called ovarian follicles or Graffian follicles.
  • Each follicle has a centrally placed large cell called ovum.
  • The ovum is formed from a cell called primary oocyte.
  • When the ovum matures, the follicle ruptures and releases the ovum (haploid) into the body cavity.
  • Ovum is non-motile and is larger in size compared to spermatozoa.
  • Every time one follicle ruptures and one ovum is released.
  • The ruptured follicle is called corpus luteum and it secretes female sex hormone - oestrogen & progesterone.
  • Follicle stimulating hormone secreted by pituitary gland stimulates the growth of follicle and leutinizing hormone secreted by pituitary gland stimulates the rupture
  • of follicle and conversion of follicle in to corpus luteum.

Related Discussions:- Human ovum

What is the water cycle, What is the water cycle? The water cycle repre...

What is the water cycle? The water cycle represents the circulation and recycling of water in nature. Liquid water on the planet surface is heated by the sun and turns into

Define obligatory and facultative water excretion, Define Obligatory and Fa...

Define Obligatory and Facultative water excretion? i) Obligatory water excretion: The kidney is 'obligated' to excrete some water to rid the body of its daily load of urinary s

Define the term - acoelomate, Define the term - Acoelomate Triploblasti...

Define the term - Acoelomate Triploblastic animals which do not have an internal body cavity. This includes flatworms and ribbon worms. However the term could be applied to oth

Explain restriction endonucleases are enzymes, Restriction endonucleases ar...

Restriction endonucleases are enzymes which: 1. make cuts at specific positions within the DNA molecule 2. recognize a specific nucleotide sequence for binding of DNA ligase

Conservation of animal genetic resources, The term farm animal genetic reso...

The term farm animal genetic resources (AnGR) is used to include all animal species, breeds and strains (and their wild relatives) that are of economic, scientific and cultural int

Two homologous human chromosomes, Two homologous human chromosomes have the...

Two homologous human chromosomes have the following structure: --A--B-.-C--D--E--F--G--H--I--J-- --A--D--C-.-B--E--F--G--J--I--H-- where the letters represent genetic markers and t

Basal metabolism and energy expenditure at high altitude, Define Basal Meta...

Define Basal Metabolism and Energy Expenditure at High Altitude? The energy and nutrient requirements depend upon total energy expenditure and metabolic rate of the individual.

Effect of environmental factors-sexual reproduction, Effect of Environmenta...

Effect of Environmental Factors some lower organisms, though the genetic determiners of the sexes are present, the ambient environment plays a decisive role in the development

Symbolising and language skills, Language, a powerful tool for communicatio...

Language, a powerful tool for communication should have played a very important part in the evolutionary history of human species. Two relevant questions that could be asked of hum

What is the general cognitive ability, What is the General Cognitive Abilit...

What is the General Cognitive Ability General cognitive ability is usually assessed using standardised intelligence tests, such as Wechsler Intelligence Scale for Children Thir

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd