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EMBRYOLOGY LAB NOTES A. Syngamy: 1. Of the of sperm that are ejaculated into the vagina, only a few thousand make it all the way out into the Most sperm survive for hours inside the female, and the ovulated oocyte is viable for hours. For fertilization to occur, coitus must occur no more than days prior to ovulation and no later than hours after. 2. The ovulated secondary oocyte is encapsulated by two walls, the and the deeper Hundreds of sperm must release their acrosomal enzymes before theses barriers are breached, and sperm fuses with the oocyte's membrane. 3. As this sperm loses its and its nucleus is pulled into the oocyte cytoplasm, changes occur in the oocyte membrane, thus preventing other sperm from entering (and ensuring in humans). 4. The secondary oocyte is now able to complete meiosis II, forming and ovum and a second The sperm nucleus swells to form the male pronucleus chromosomes); the ovum nucleus also swells to become the chromosomes). The true moment of .two pronuclei fuse, producing a diploid cell called a B. Cleavage: i deton bas 1. The zygote now undergoes a period of rapid 2. occurs as the divisions, called cleavage. identical About 36 hours after fertilization, the first cleavage division has produced cells; by 72 hours, it's a berry-shaped cluster of-16 cells called the : the morula develops into this hollow ball of~100 cells which enters the uterus around day 4 (post-fertilization). It is made up of an outer covering an inner cell mass (which will eventually called the and a fluid-filled blastocyst cavity. become the C. Implantation: 1. After 2 or 3 days of floating in the uterine cavity, the trophoblast cells overlying the inner cell mass adhere to the Implantation thus begins about days after ovulation (given a properly prepared endometrium). at is soon covered over and 2. After the trophoblast embeds in the endometrial lining, it quickly. the point of contact, and the implanted sealed off by proliferation of endometrial cells.

EMBRYOLOGY LAB NOTES A. Syngamy: 1. Of the of sperm that are ejaculated into the vagina, only a few thousand make it all the way out into the Most sperm survive for hours inside the female, and the ovulated oocyte is viable for hours. For fertilization to occur, coitus must occur no more than days prior to ovulation and no later than hours after. 2. The ovulated secondary oocyte is encapsulated by two walls, the and the deeper Hundreds of sperm must release their acrosomal enzymes before theses barriers are breached, and sperm fuses with the oocyte's membrane. 3. As this sperm loses its and its nucleus is pulled into the oocyte cytoplasm, changes occur in the oocyte membrane, thus preventing other sperm from entering (and ensuring in humans). 4. The secondary oocyte is now able to complete meiosis II, forming and ovum and a second The sperm nucleus swells to form the male pronucleus chromosomes); the ovum nucleus also swells to become the chromosomes). The true moment of .two pronuclei fuse, producing a diploid cell called a B. Cleavage: i deton bas 1. The zygote now undergoes a period of rapid 2. occurs as the divisions, called cleavage. identical About 36 hours after fertilization, the first cleavage division has produced cells; by 72 hours, it's a berry-shaped cluster of-16 cells called the : the morula develops into this hollow ball of~100 cells which enters the uterus around day 4 (post-fertilization). It is made up of an outer covering an inner cell mass (which will eventually called the and a fluid-filled blastocyst cavity. become the C. Implantation: 1. After 2 or 3 days of floating in the uterine cavity, the trophoblast cells overlying the inner cell mass adhere to the Implantation thus begins about days after ovulation (given a properly prepared endometrium). at is soon covered over and 2. After the trophoblast embeds in the endometrial lining, it quickly. the point of contact, and the implanted sealed off by proliferation of endometrial cells.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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EMBRYOLOGY LAB NOTES A. Syngamy: 1. Of the of sperm that are ejaculated into the vagina, only a few thousand make it all the way out into the Most sperm survive for hours inside the female, and the ovulated oocyte is viable for hours. For fertilization to occur, coitus must occur no more than days prior to ovulation and no later than hours after. 2. The ovulated secondary oocyte is encapsulated by two walls, the and the deeper Hundreds of sperm must release their acrosomal enzymes before theses barriers are breached, and sperm fuses with the oocyte's membrane. 3. As this sperm loses its and its nucleus is pulled into the oocyte cytoplasm, changes occur in the oocyte membrane, thus preventing other sperm from entering (and ensuring in humans). 4. The secondary oocyte is now able to complete meiosis II, forming and ovum and a second The sperm nucleus swells to form the male pronucleus chromosomes); the ovum nucleus also swells to become the chromosomes). The true moment of .two pronuclei fuse, producing a diploid cell called a B. Cleavage: i deton bas 1. The zygote now undergoes a period of rapid 2. occurs as the divisions, called cleavage. identical About 36 hours after fertilization, the first cleavage division has produced cells; by 72 hours, it's a berry-shaped cluster of-16 cells called the : the morula develops into this hollow ball of~100 cells which enters the uterus around day 4 (post-fertilization). It is made up of an outer covering an inner cell mass (which will eventually called the and a fluid-filled blastocyst cavity. become the C. Implantation: 1. After 2 or 3 days of floating in the uterine cavity, the trophoblast cells overlying the inner cell mass adhere to the Implantation thus begins about days after ovulation (given a properly prepared endometrium). at is soon covered over and 2. After the trophoblast embeds in the endometrial lining, it quickly. the point of contact, and the implanted sealed off by proliferation of endometrial cells.
Transcribed Image Text:EMBRYOLOGY LAB NOTES A. Syngamy: 1. Of the of sperm that are ejaculated into the vagina, only a few thousand make it all the way out into the Most sperm survive for hours inside the female, and the ovulated oocyte is viable for hours. For fertilization to occur, coitus must occur no more than days prior to ovulation and no later than hours after. 2. The ovulated secondary oocyte is encapsulated by two walls, the and the deeper Hundreds of sperm must release their acrosomal enzymes before theses barriers are breached, and sperm fuses with the oocyte's membrane. 3. As this sperm loses its and its nucleus is pulled into the oocyte cytoplasm, changes occur in the oocyte membrane, thus preventing other sperm from entering (and ensuring in humans). 4. The secondary oocyte is now able to complete meiosis II, forming and ovum and a second The sperm nucleus swells to form the male pronucleus chromosomes); the ovum nucleus also swells to become the chromosomes). The true moment of .two pronuclei fuse, producing a diploid cell called a B. Cleavage: i deton bas 1. The zygote now undergoes a period of rapid 2. occurs as the divisions, called cleavage. identical About 36 hours after fertilization, the first cleavage division has produced cells; by 72 hours, it's a berry-shaped cluster of-16 cells called the : the morula develops into this hollow ball of~100 cells which enters the uterus around day 4 (post-fertilization). It is made up of an outer covering an inner cell mass (which will eventually called the and a fluid-filled blastocyst cavity. become the C. Implantation: 1. After 2 or 3 days of floating in the uterine cavity, the trophoblast cells overlying the inner cell mass adhere to the Implantation thus begins about days after ovulation (given a properly prepared endometrium). at is soon covered over and 2. After the trophoblast embeds in the endometrial lining, it quickly. the point of contact, and the implanted sealed off by proliferation of endometrial cells.
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