'Zona pellucida' diaporamas de présentation

Fertilization and Sexual Differentiation

Fertilization and Sexual Differentiation. April 8 th 2010. So far have discussed ultimate causation Ontogeny (development) is an important component of proximate causation. On tap for today. Fertilization Ovulation Sperm maturation Capacitation Acrosomal Reaction Fusion of nuclei

634 views • 48 slides

Implantation of the blastocyst in mustelid carnivores Allen C Enders

Implantation of the blastocyst in mustelid carnivores Allen C Enders Department of Cell Biology and Human Anatomy University of California, Davis. Blastocyst stage of mustelid carnivores.

628 views • 48 slides

Development and Aging

643 views • 48 slides

Lecture 18: Embryo Development

Lecture 18: Embryo Development. Animal Science 434 John Parrish. Timing of Insemination. Species Time of Ovulation Optimal Insemination Time Cow 29 hr after start End of estrus (12 hr after of estrus first seen in estrus) Ewe End of estrus End of 1st day or start of 2nd day of estrus

1.34k views • 46 slides

First week of development

First week of development. Fertilization. FERTILIZATION. fusion of two mature germ cells an ovum and a spermatozoon, to form a mono nucleated single cell- zygote . The fusion occurs in the ampulla of the uterine tube.

1.95k views • 44 slides

PREGNANCY

PREGNANCY. Prof. Aziza Tosson. Outline. Fertilization Development before Birth Fetal Circulation Embryonic Development Fetal Development Birth. Conception. A secondary oocyte can be fertilized for about 24 hours after ovulation

668 views • 42 slides

The Reproductive System

The Reproductive System. Male Reproductive System. Male Reproductive System. The male gonads (testes) produce sperm and lie within the scrotum Sperm are delivered to the exterior through a system of ducts: epididymis ? ductus deferens ? ejaculatory duct ? urethra Accessory sex glands:

488 views • 40 slides

Animal Development

Animal Development. Preformation. How does an egg become an animal? Until the end of the 18 th century, the prevailing theory was that the embryo was a miniature infant. This idea of preformation also included the thought that each embryo contained all of the descendents as smaller embryos.

779 views • 39 slides

Class 5, Part II: Sperm-Zona Interactions & Acrosomal Exocytosis (AE; Formerly Known as AR)

Class 5, Part II: Sperm-Zona Interactions & Acrosomal Exocytosis (AE; Formerly Known as AR). Fertilization is a complex series of reactions that, if once completed, excludes all possibilities of repetition

491 views • 38 slides

Getting to the right site:

Getting to the right site:. Helping the sperm: At ovulation, the cervical mucus increases in amount and becomes less thick, allowing easier sperm transport.

400 views • 32 slides

Pregnancy & Human Development

374 views • 31 slides

FERTILIZATION

FERTILIZATION. By: Dr. Mujahid Khan. Fertilization. Is a complex sequence of coordinated molecular events Begins with a contact between sperm and ovum Ends up with intermingling of maternal and paternal chromosomes. Site. Usual site is the ampulla of uterine tubes

988 views • 30 slides

Gametogenesis

751 views • 28 slides

Fertilization - Part 1

Fertilization - Part 1. Gilbert - Chapter 7 pp. 181-186. Fertilization.

606 views • 27 slides

The Egg

The Egg. Egg Microvilli. Zona Pellucida. Zp. Zona Pellucida Glycoproteins. The Sperm. Axonemes and Sliding Microtubules. Sperm Surface Asymmetry. Sea Urchins. Sea Urchin Acrosome Reaction. Sea Urchin Fertilization Direct Binding of Sperm to Egg.

619 views • 25 slides

First week of development

427 views • 22 slides

By Prof. Saeed Abuel Makarem

Implantation. By Prof. Saeed Abuel Makarem. Implantation By. Prof. Saeed Abuel Makarem. Cleavage of Zygote. Begins about 30 hrs after fertilization Zygote divides first into 2 then 4 then 8 & 16 cells Zygote is within the thick zona pellucida during cleavage

345 views • 20 slides

FERTILISASI

FERTILISASI. PROBLEMS. How does the sperm head enter the egg? How does the fertility events? How does the egg PREVENT entry of MORE THAN ONE sperm? (Polyspermy). Fusi. Sperma. Telur. Fusi. Sperma. Sperma. Polysperma. Fusi. Fusi. Telur. Fusi. Embrio. Sperma. Fertilization.

543 views • 18 slides

FIRST WEEK OF PREGNANCY

FIRST WEEK OF PREGNANCY. Segmentation. Dr. Sherif Fahmy. START OF CLEAVAGE. Fertilization leads to formation of a zygote which is a fertilized ovum surrounded with zona pellucida.

263 views • 14 slides

Fertilisation

Fertilisation. By Zoe Rees. FLAGELLUM. MID-PIECE. NUCLEUS. HEAD. PROTECTIVE COATING. CORONA RADIATA. PERIVETELLINE SPACE. ZONA PELLUCIDA. CELL MEMBRANE. NUCLEUS. Capacitation.

200 views • 9 slides