Developmental Stages Of The Foetus

[LeeAndro]

Published 8/2022MP4 | Video: h264, 1280x720 | Audio: AAC, 44.1 KHzLanguage: English | Size: 316.18 MB | Duration: 0h 30m

From gametes formation to childbirth

What you'll learn
The reproductive system
Fertilization of the ovum by the sperm
Developmental stages of the fetus
Birth of the neonate
Requirements
A primary knowledge in reproduction will aid easy understanding
Description
A zygote, also known as a fertilized ovum or fertilized egg, is the union of a sperm cell and an egg cell.​

The zygote bs as a single cell but divides rapidly in the days following fertilization. The zygote's single cell contains all of the 46 necessary chromosomes, getting 23 from the sperm and 23 from the egg. The zygote phase is brief, lasting only about four days. Around the fifth day, the mass of cells becomes known as a blastocyst. The embryo develops from the blastocyst. In order for reproduction to take place, a single sperm cell must penetrate the outer surface of an egg in a process known as fertilization. During a healthy reproductive cycle, a single egg cell is released from the follicle into the fallopian tube at ovulation.If sperm are present, thousands will attempt to penetrate this single egg cell. Once a single sperm has broken through the outer surface, a zygote is formed. Chal changes in the surface of the egg prevent other sperm from entering. Zygotes divide through a process known as mitosis, in which each cell doubles (one cell becomes two, two becomes four, and so on). This two-week stage is known as the geal period of development and covers the of fertilization (also called conception) to the implantation of the blastocyst in the uterus.The sperm cell contains paternal genetic information while the egg cell contains maternal genetic information. Because each cell contains half of the genetic material, each cell is known as a haploid cell. When these two haploid cells join, they form a single diploid cell that contains all necessary chromosomes.The zygote then travels down the fallopian tube to the uterus. As it travels, its cells rapidly divide and it becomes a blastocyst. Once in the uterus, the blastocyst must implant in the lining in order to obtain the nourishment it needs to grow and survive.The embryonic period of development lasts from two weeks after conception through the eighth week, during which the organism is known as an embryo

Overview

Section 1: Introduction

Lecture 1 Introduction to the course

Section 2: Reproductive system

Lecture 2 Section introduction

Lecture 3 Introduction to reproductive system

Lecture 4 Gametogenesis

Section 3: Male reproductive system

Lecture 5 Section introduction

Lecture 6 The male reproductive system

Lecture 7 Spermatogenesis

Section 4: Female reproductive system

Lecture 8 Section introduction

Lecture 9 The female reproductive system

Lecture 10 Oogenesis

Lecture 11 Menstrual cycle

Section 5: Fertilization

Lecture 12 Section introduction

Lecture 13 Process of fertilization

Lecture 14 Capacitation

Lecture 15 Acrosome reaction

Section 6: Development of the fetus

Lecture 16 Section introduction

Lecture 17 Post fertilization

Lecture 18 Second week

Lecture 19 Third week

Lecture 20 Fourth week

Lecture 21 Fifth to fortieth week

Lecture 22 Child birth

Lecture 23 Closing part

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