SpermOvaryHaploidOocytesMaturationOogenesisSecondaryOvulationMenstrual cycleCytoplasmSphericalFertilizationOvariesUterusChromosomesOrgansNucleusExtrusionYolkCorticalDifferentiationCellsCleavagePronucleiCyclesPubertyDividesMembrane-boundSeparatesFormFormationPlasmaBasalCellBirthPrimaryProcessesUrsusAnteriorNorth PoleNeckBears
Sperm11
- Activation of the ovum includes the following events: Cortical reaction to block against other sperm cells Activation of egg metabolism Reactivation of meiosis DNA synthesis The sperm may trigger egg activation via the interaction between a sperm protein and an egg surface receptor. (wikipedia.org)
- 4 hours after fusion of sperm and ovum, DNA synthesis begins. (wikipedia.org)
- Additionally, quality control of spermatozoa is much worse than for the ovum, as many sperm are released whereas only one dominant follicle is released per cycle. (wikipedia.org)
- In the human reproductive process, two kinds of sex cells ( gametes), are involved: the male gamete (sperm), and the female gamete (egg or ovum). (wikibooks.org)
- Both systems have gonads that produce (sperm and egg or ovum) and sex organs. (wikibooks.org)
- Human sperm is a motile cell divided into a head, body, and a long tail. (microbenotes.com)
- The head consists of acrosomes that secrete enzymes and helps in the entry of sperm inside an ovum. (microbenotes.com)
- The ovum formed is non-motile and remains in the fallopian tube to be fertilized by the sperm. (microbenotes.com)
- The sperm and ova come in contact, zygote formation occurs later implantation and finally a new individual is formed. (saralstudy.com)
- Human development is a continuous process that begins when an oocyte (ovum) from a female is fertilized by a sperm (or spermatozoon) from a male. (americanrtl.org)
- If penetrated by a sperm, the secondary oocyte will undergo a second meiotic division after which the second polar body is extruded. (mhmedical.com)
Ovary4
- Oogenesis is the process of formation of ova or eggs in the ovary of a fem ale. (studypool.com)
- Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary. (bankofbiology.com)
- Pampiniform bodies - Rudimentary organs homologous with the male epididymis that lie in the broad ligament of the uterus next to the ovary and fallopian tube. (pathologicalbodies.com)
- The secondary oocyte then releases the ovum that moves around the ovary until fertilization. (microbenotes.com)
Haploid2
- The end product of oogenesis is the formation of a single functional egg or ovum which is haploid. (biologyease.com)
- The primary oocytes begin meiosis but are arrested at the diplotene state until OVULATION at PUBERTY to give rise to haploid secondary oocytes or ova (OVUM). (uchicago.edu)
Oocytes1
- These follicles then undergo mitotic and meiotic divisions, causing the cell to divide into two larger secondary oocytes and a smaller polar body. (microbenotes.com)
Maturation4
- Diagram showing the reduction in number of the chromosomes in the process of maturation of the ovum . (wikipedia.org)
- oocytogenesis , ootidogenesis , and finally maturation to form an ovum (oogenesis proper). (wikipedia.org)
- a minute cell which separates by karyokinesis from the ovum during its maturation . (en-academic.com)
- In the maturation of ordinary ova two polar bodies are formed, but in parthogenetic ova only one. (en-academic.com)
Oogenesis2
- Oogenesis is the process of formation of female gamete or ovum through a series of mitotic and meiotic divisions occurring in the female reproductive system. (microbenotes.com)
- (a) They produce female gametes called ova by the process of oogenesis. (saralstudy.com)
Secondary2
- This results in the production of a secondary oocyte and one polar body. (wikibooks.org)
- The primary oocyte then evolves into a secondary oocyte and the first polar body is formed and extruded. (mhmedical.com)
Ovulation2
- This chapter describes the different parts of the female reproductive system: the organs involved in the process of reproduction, hormones that regulate a woman's body, the menstrual cycle, ovulation and pregnancy, the female's role in genetic division, birth control, sexually transmitted diseases and other diseases and disorders. (wikibooks.org)
- The primary ova remain dormant until ovulation and become matured afterward. (microbenotes.com)
Menstrual cycle1
- If fertilization doesn't occur, the cell degenerates into a corpus luteum and is removed from the body during the menstrual cycle. (microbenotes.com)
Cytoplasm2
- Polar bodies have practically no CYTOPLASM. (ctsicn.org)
- Odland bodies - Small, granular, membrane-bound vacuoles found in the cytoplasm of skin keratinocytes. (pathologicalbodies.com)
Spherical2
- Polar spherical triangle} ( Spherics ), a spherical triangle whose three angular points are poles of the sides of a given triangle. (en-academic.com)
- It contains membrane-bound spherical bodies called cortical granules, which contain acid mucopolysaccharides. (microbiologynote.com)
Fertilization3
- Oocyte (or ovum/egg) activation is a series of processes that occur in the oocyte during fertilization. (wikipedia.org)
- Fertilization triggers completion of the second meiotic division and the result is one ovum and an additional polar body. (wikibooks.org)
- Their research group has described the timing of the morphological events of fertilization, including extrusion of the polar body and formation of the pronucleus, using their video recording system. (ecerm.org)
Ovaries2
- The main functions of mature ovaries are to generate a fertilizable ovum each month and to prepare the endometrium for implantation through the sequential release of estrogen and progesterone. (mhmedical.com)
- It ih inches below it the ovaries of the fiecond polar bodies of th« calcaneo-cuboid. (cherokeeiowa.com)
Uterus1
- Rel-a-tively long ( 195 − 265 days) because of delayed implan-ta-tion of the divid-ing fer-tilised ovum in the uterus. (aboutzoos.info)
Chromosomes1
- A spermatid, therefore, differs from a typical animal cell not only because it possesses the chromatic substance of only half the typical number of chromosomes, but also because it possesses an accessory body and two centrosomes. (co.ma)
Organs2
- The concept of the endocrine system, however, must be extended beyond these organs, because many other organs in the body secrete hormones. (50webs.org)
- Hormones affect the metabolism of their target organs and, by this means, help regulate total body metabolism, growth, and reproduction. (50webs.org)
Nucleus1
Extrusion1
- This results in the production and extrusion of the second polar body. (wikipedia.org)
Yolk1
- An ovum is an oval structure that contains yolk or plasma that provides nutrients to the cell. (microbenotes.com)
Cortical1
- Blood that will stay in the body exits through the cortical radiate veins, then goes into the arcuate vein, then into the interlobar vein, then the renal vein, then back to the heart via the inferior vena cava. (easynotecards.com)
Differentiation1
- [1] is the differentiation of the ovum (egg cell) into a cell competent to further develop when fertilized. (wikipedia.org)
Cells4
- The property of spreading of cancer cells from one part of the body to other parts is called metastasis. (ktbssolutions.com)
- Oval fat bodies - These are degenerating renal tubular epithelial cells or macrophages containing abundant lipid. (pathologicalbodies.com)
- Papp-Lantos bodies - Cytoplasmic inclusion bodies found in glial cells of the brain in multiple-system atrophy (MSA), a degenerative neurological disorder. (pathologicalbodies.com)
- These cells are termed primary ova. (microbenotes.com)
Cleavage1
- They are responsible for the formation of the holoblastic cleavage and the first cellar division of the fertilized ovum in embryological development. (coconutzhealth.com)
Pronuclei1
- Sec. of uteri showing ova with male and female pronuclei prepared microscope slide. (inds.co.uk)
Cycles1
Puberty1
- Such observations suggest that a critical body weight or amount of fat is necessary for puberty. (msdmanuals.com)
Divides2
- It is unknown that whether the first polar body divides further or degenerates. (bankofbiology.com)
- The first polar body formed is usually larger than the second one, and often divides into two after its separation from the ovum. (en-academic.com)
Membrane-bound1
- These bodies are membrane-bound, contain granular, electron dense material and are thought to be closely related to rough endoplasmic reticulum. (pathologicalbodies.com)
Separates1
- The Chong Mai also defines the central core of the body and energetically 'separates' it from the periphery. (coconutzhealth.com)
Form2
- Papillary mesenchymal bodies - These are aggregations of fibroblasts that represent abortive attempts to form the papillary mesenchyme responsible for hair induction. (pathologicalbodies.com)
- With the lumbo-sacral cord is to form amongst the ovum ihia is only. (cherokeeiowa.com)
Formation2
- No polar body formation. (bankofbiology.com)
- Summarize the correct sequence from the formation of a drop of urine to the elimination from the body. (easynotecards.com)
Plasma1
- The first membrane, called the vitelline membrane, is a transparent non-living membrane formed by the ovum itself and is located just outside the plasma membrane. (microbiologynote.com)
Basal1
- Parabasal bodies - Cytoplasmic bodies closely associated with the nuclei, kinetoplasts and basal bodies in certain parasitic flagellate protozoa. (pathologicalbodies.com)
Cell3
- Polar body}, {Polar cell}, or {Polar globule} (Biol. (en-academic.com)
- Numerous mitochondria are present, and an indefinite structure, called the accessory body, is also found in the cell protoplasm. (co.ma)
- This property usually means that large molecules and small polar molecules cannot cross the bilayer, and so the cell membrane, without the guidance of different structures. (ecohealth.net)
Birth1
- even at birth, this is only a partial membrane, as menstrual fluid and other secretions must be able to exit the body, regardless of penile-vaginal intercourse. (edu.vn)
Primary2
- Each primary oocyte gives one ovum. (bankofbiology.com)
- This means that the four primary vessels fulfill a special function of dividing the body in halves (energetically). (coconutzhealth.com)
Processes1
- Pacchionian bodies - Enlarged fleshy processes or villi on the outer surface of the dura mater of the brain, also called arachnoid villi or arachnoid granulations. (pathologicalbodies.com)
Ursus1
- Polar bear} (Zo["o]l.), a large bear ({Ursus maritimus} syn. (en-academic.com)
Anterior3
- The Governing and Conception Vessels each have two energy flows on the anterior and posterior vertical midline of the body. (coconutzhealth.com)
- At its anterior end, where it joins the head, there is a deeply staining anterior centrosome, and at its posterior end a similarly deepstaining posterior centrosome, from which a deep-staining axial filament extends posteriorly through the body and tail into the end-piece (Fig. 21). (co.ma)
- Four pyriform polar capsules equal in size, measuring 3.1 ± 0.4 µm long and 2.5 ± 0.3 µm wide, were situated at the same level in the anterior pole of the myxospore, each with a polar filament coiled in 7-8 turns. (bvsalud.org)
North Pole2
- Polar distance}, the angular distance of any point on a sphere from one of its poles, particularly of a heavenly body from the north pole of the heavens. (en-academic.com)
- There are no reports of polar bears in the vicin-ity of the North Pole itself. (aboutzoos.info)
Neck3
- A spermatozoon is a minute organism consisting of a head, a neck, a body, a tail, and an end-piece. (co.ma)
- The neck is an extremely short constricted region which intervenes between the head and the body. (co.ma)
- The neck of the polar bear is longer than in other species of bears, and the elon-gated head has small ears. (aboutzoos.info)
Bears8
- The most well known of all bears, the polar bear is imme-di-ately recog-nis-able from the dis-tinc-tive white colour of its thick fur. (aboutzoos.info)
- Polar bears have large strong limbs and huge forepaws which are used as pad-dles for swim-ming. (aboutzoos.info)
- Polar bears feed pri-mar-ily on ringed seals. (aboutzoos.info)
- Polar bears also eat harp seals and hooded seals, and they scav-enge on car-casses of cari-bou, musk-oxen, whale, wal-rus (usu-ally pups) and seal. (aboutzoos.info)
- The far-thest south that polar bears live on a year-round basis is in James Bay (which is at about the same lat-i-tude as Lon-don) in Canada, where bears den at about 53 °N lat-i-tude on Akimiski Island. (aboutzoos.info)
- Twins are most com-mon in polar bears and account for about 2 ⁄ 3 of the litters. (aboutzoos.info)
- Fol-low-ing the dras-tic pop-u-la-tion losses of polar bears in the 1960 s and 1970 s, an inter-na-tional agree-ment was signed between the five nations with polar bears (Canada, Nor-way, USA , the for-mer USSR and Den-mark, which gov-erned Green-land at that time). (aboutzoos.info)
- These nations signed the 'Inter-na-tional Agree-ment on the Con-ser-va-tion of Polar Bears', and agreed to pro-hibit unreg-u-lated hunt-ing and to out-law the hunt-ing of the bears from air-crafts and ice-break-ers. (aboutzoos.info)