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  Encyclopedia of Keywords > Nature > Life > Reproduction > Oocyte > Ovum   Michael Charnine

Keywords and Sections
UTERINE WALL
POLAR BODY
MATURE OVUM
FEMALE REPRODUCTIVE CELL
FUNCTION
UNION
THREE
SPACE
FORM
CLEAVAGE
OFFSPRING
ORGANISMS
FEMALE
DEVELOPMENT
MESODERM
FLAGELLUM
ENDODERM
POLLEN TUBE
FERTILIZING
ACROSOME
FEMALE GAMETE
SPERM CELL
EGG CELL
OOTID
OOGENESIS
FALLOPIAN TUBE
HUMANS
EMBRYOLOGY
HAPLOID
CELLS
FOLLICLE
PROCESS
SINGLE CELL
MEIOSIS
CHROMOSOMES
SPERMATOZOA
MATURATION
GAMETES
OVULATION
OVARY
OVARIES
EMBRYO
UTERUS
EGG
FERTILIZATION
FERTILIZED OVUM
Review of Short Phrases and Links

    This Review contains major "Ovum"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. Ovum was discovered by von Baer. Kerckring's centre for ossification is associated with occipital bones.
  2. An ovum (plural ova) is a haploid female reproductive cell or gamete.
  3. If the ovum is fertilized by the sperm (male reproductive cell), pregnancy ensues (see reproductive system).
  4. The ovum is the largest cell in the human body, typically visible to the naked eye without the aid of a microscope or other magnification device.

Uterine Wall

  1. BLIGHTED OVUM (EGG) - Rarely-used term for an embryo that attaches itself to the uterine wall but the embryo does not develop.

Polar Body

  1. Polar body is a cell structure found inside an ovum.

Mature Ovum

  1. LUETINIZING HORMONE: or LH is responsible for ovulation or the release of a mature ovum from the ovarian follicle.

Female Reproductive Cell

  1. Egg A female reproductive cell, also called an oocyte or ovum.

Function

  1. Function: responsible for the transport of mature ovum from ovary to uterus.

Union

  1. The union of the sperm and the ovum.

Three

  1. If all three successfully coincide, human consciousness arises in the fertilized ovum and rebirth occurs.

Space

  1. The space wherein an ovum or immature ovum is located is the cell-nest[3].

Form

  1. Week 2 (day 1-7 of fertilization) Fertilization of the ovum to form a zygote.
  2. In modern biology, it refers to a form of reproduction in which an ovum develops into a new individual without having been fertilized.

Cleavage

  1. Segmentation cavity (Biol.), the cavity formed by the arrangement of the cells in segmentation or cleavage of the ovum; the cavity of the blastosphere.

Offspring

  1. Identical alleles may have different effects on offspring, depending on whether they arrive in the zygote via the ovum or via the sperm.

Organisms

  1. Diploblastic organisms are organisms which evolve from such an ovum.
  2. In higher and intermediate animals, all organisms arise from a triploblastic ovum.

Female

  1. The biological function of a flower is to mediate the union of male sperm with female ovum in order to produce seeds.
  2. A male seahorse takes and fertilises the ovum of the female, then bears the offspring.

Development

  1. One of three so-called germ layers of tissue formed in the early development of a fertilized ovum (egg).
  2. The formation, development, and maturation of an ovum.
  3. It involves the development of the various stages of the immature ovum.

Mesoderm

  1. The extension of the mesoderm takes place throughout the whole of the embryonic and extra-embryonic areas of the ovum, except in certain regions.

Flagellum

  1. In higher animals the ovum differs from the sperm in that it is larger and is nonmotile, a smooth sphere or oval lacking the flagellum of the sperm.

Endoderm

  1. Triploblastic is a condition of the ovum in which there are three primary germinal layers: the ectoderm, mesoderm, and endoderm.

Pollen Tube

  1. A male sex cell travels down the pollen tube and fertilizes the ovum (female sex cell) to produce an embryo plant.

Fertilizing

  1. In these cases chances of fertilizing an ovum can increase with the size of the sperm cell.

Acrosome

  1. Acrosome: this is a cap of the sperm holding enzymes that will allow the sperm to penetrate the outer layers of the ovum.

Female Gamete

  1. A haploid cell that results from the meiotic division of an oocyte and becomes a female gamete or an ovum.

Sperm Cell

  1. A sperm cell is motile and swims via chemotaxis, using its flagellum to propel itself towards the ovum.
  2. That is, two haploid cells—usually an ovum from a female and a sperm cell from a male —merge into a single diploid cell called the zygote (or zygocyte).
  3. A parallel is charted between the sperm cell and the ovum where the genetic code lies coiled and the kundalini.

Egg Cell

  1. In other words, it is an immature ovum, or egg cell.

Ootid

  1. Each ootid, in turn, differentiate s into an ovum The formation of an oocyte is called oocytogenesis.
  2. Polar bodies degenerate and the ootid differentiates to form an ovum.
  3. An ootid is a mature ovum, that has been penetrated by a sperm but has not yet formed a zygote.

Oogenesis

  1. In the final stage of oogenesis, the ootid develops into the ovum, the mature egg cell.
  2. Oogenesis consists of several sub-processes: oocytogenesis, ootidogenesis, and finally maturation to form an ovum.

Fallopian Tube

  1. ZYGOTE INTRAFALLOPIAN TRANSFER (ZIFT) - The ovum is fertilized in vitro and transferred to the fallopian tube before it divides.

Humans

  1. All higher and intermediate animals from flat worms to humans, arise from a triploblastic ovum.

Embryology

  1. The study of the ovum is included in the science of embryology.
  2. He made important researches and observations in anatomy and physiology, particularly in embryology, discovering the germinal vesicle of the human ovum.

Haploid

  1. The oocyte now undergoes its second meiotic division producing the haploid ovum and releasing a polar body.
  2. The development of a diploid cell into a haploid ovum or egg cell.

Cells

  1. The cells that produced sperm cells, and the cells that produced ovum, (called gametocytes,) are also part of the germline.
  2. It is not yet determined whether the zona striata is a product of the cytoplasm of the ovum or of the cells of the corona radiata, or both.
  3. In this ovum all the yolk from the original cell is collected; the three other, yolkless, cells are called polar bodies and never develop further.

Follicle

  1. The follicle is stimulated to release the ovum by a hormone called FSH (Follicle Stimulating Hormone), which is made by the pituitary gland.

Process

  1. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization.

Single Cell

  1. Once the sperm and the ovum merge with each other, a single cell is formed.

Meiosis

  1. Both polar bodies at the end of Meiosis II disintegrate leaving only the ootid which undergoes maturation and eventually matures into an ovum.
  2. In meiosis, the oocyte divides in four, of which only one becomes an ovum, the others becoming polar bodies.
  3. Both polar bodies disintegrate at the end of Meiosis II, leaving only the ootid, which then eventually undergoes maturation into a mature ovum.

Chromosomes

  1. Gamete Mature male or female reproductive cell (sperm or ovum) with a haploid set of chromosomes (23 for humans).

Spermatozoa

  1. Allogamy is a term used in the field of biological reproduction describing the fertilization of an ovum from one individual with the spermatozoa of another.

Maturation

  1. Scheme showing analogies in the process of maturation of the ovum and the development of the spermatids (young spermatozoa).
  2. The cells that surround the ovum during development and maturation of the ovarian follicle.
  3. Although the oocyte and the ovum are at different stages of maturation, the two terms are used interchangeably.

Gametes

  1. Meiosis occurs only in the process of gametogenesis, i.e., when the gametes, or sex cells (ovum and sperm), are being formed.
  2. Except in some lower organisms, the gametes are of two distinct types called the egg (ovum) and the sperm.
  3. Heterogamy is the fusion of two clearly differing kinds of gametes, distinguished as the ovum and the sperm.

Ovulation

  1. The rise in estrogen triggers the secretion of LH, which causes the follicle to burst and release the mature ovum, a process known as ovulation.
  2. Normally, just one follicle fully matures, rupturing and releasing an ovum through the ovary wall in a process called ovulation.
  3. For ovulation to be successful, the ovum must be supported by both the corona radiata and cumulus oophorous granulosa cells.

Ovary

  1. Oogenesis is the creation of an ovum (egg cell) in the ovarian follicle of the ovary.
  2. After its release from the ovary, the ovum passes into the oviduct (uterine or fallopian tube) and into the uterus.
  3. In females, luteinizing hormone (LH) causes release of the ovum from the ovary and supports the corpus luteum after ovulation.

Ovaries

  1. Oocyte (Egg) Also referred to as an ovum, or the reproductive cell produced in the ovaries each month.
  2. The ovaries are also the sites of ovum (egg) maturation.
  3. From Latin ovum comes Italian uovo (egg) and ovaie (ovaries).

Embryo

  1. In animals, the process involves the fusion of an ovum with a sperm, which eventually leads to the development of an embryo.
  2. The union of spermatozoon and ovum produces a zygote, which develops into an embryo, which, in turn, continues to develop inside the parent organism.
  3. It surrounds the embryo and is produced by an unusual process that parallels the fertilization of the ovum by a male gamete.

Uterus

  1. During copulation the cloaca or vagina gets inseminated, and then the spermatozoa move through chemotaxis to the ovum inside a Fallopian tube or the uterus.
  2. The sperm then travels through the vagina and cervix into the uterus or fallopian tubes for fertilization of the ovum.
  3. At certain intervals, typically approximately every 28 days, the ovaries release an ovum, which passes through the fallopian tube into the uterus.

Egg

  1. When ovulation occurs, the ovum (egg) moves into the fallopian tube and then is available for fertilization.
  2. Millions of sperm are present in each ejaculation, to increase the chances of one fertilizing an egg or ovum.
  3. When an egg (ovum) is fertilized and begins to develop inside the fallopian tubes.

Fertilization

  1. Over a regular interval, a process of oogenesis matures one ovum to be sent down the Fallopian tube attached to its ovary in anticipation of fertilization.
  2. The primary direct function of the male reproductive system is to provide the male gamete or spermatozoa for fertilization of the ovum.
  3. Fertilization of the ovum (egg cell) usually takes place in the Fallopian tube.

Fertilized Ovum

  1. When a fertilized ovum reaches the uterus, it becomes implanted in the lining of the uterus, known as endometrium and a pregnancy begins.
  2. The formation of an embryo from a fertilized ovum, or zygote.
  3. The cell formed by the union of two gametes, especially a fertilized ovum before cleavage.

Categories

  1. Nature > Life > Reproduction > Oocyte
  2. Nature > Life > Animals > Zygote
  3. Sperm
  4. Fertilized
  5. Fertilization

Related Keywords

    * Fertilized * Oocyte * Oocyte Ovum * Sperm * Zygote
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  Short phrases about "Ovum"
  Originally created: August 01, 2010.
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