tag:blogger.com,1999:blog-48694677352131755442012-02-16T12:13:46.104-08:00suararakyathttp://www.blogger.com/profile/02892550010962704533noreply@blogger.comBlogger31100tag:blogger.com,1999:blog-4869467735213175544.post-87164222498388643022009-03-04T07:04:00.000-08:002009-03-04T07:51:26.271-08:00<ol><li> <strong>Fertilisation</strong> is the process whereby the <strong>sperm</strong> fuses with the <strong>ovum</strong> to form the <strong>zygote.</strong> It occur in the upper part of Fallopian tube.</li><br /><br /><br /><li>Only one sperm is needed to fertilise the ovum.</li><br /><br /><li><a href="http://1.bp.blogspot.com/_hRBLfRV9pJU/Sa6bV-aBumI/AAAAAAAAAAU/2jNIcSGKTYk/s1600-h/tube_fertilisation_tcm38-555.jpg"><img id="BLOGGER_PHOTO_ID_5309351812548115042" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 283px; CURSOR: hand; HEIGHT: 305px" alt="" src="http://1.bp.blogspot.com/_hRBLfRV9pJU/Sa6bV-aBumI/AAAAAAAAAAU/2jNIcSGKTYk/s400/tube_fertilisation_tcm38-555.jpg" border="0" /></a></li><br /><br /><br /><p></p><br /><br /><p></p><br /><br /><p></p><br /><br /><p></p><br /><br /><p></p><br /><br /><p></p><br /><br /><p></p><br /><p><em></em></p><br /><p><em>the journey of the sperms to the Fallopian tube</em><br /></p></ol><br /><br /><ol><br /><li>The rapid growth and development of a baby between the zygote stage and birth is called <strong>pregnancy</strong>.</li><br /><br /><br /><li>The zygote undergoes cell division as it travels down the Fallopian tube towards the uterus.</li><br /><br /><br /><li>The zygote forms a ball of cells and is referred to as <strong>embryo</strong>.</li><br /><br /><br /><li>About seven days after fertilisation, the embryo embeds in the tissues of the uterus lining. This process is called <strong>implantation</strong>.</li><br /><br /><a href="http://4.bp.blogspot.com/_hRBLfRV9pJU/Sa6dXk6BzoI/AAAAAAAAAAc/MP-46Ll2hck/s1600-h/hs4.gif"><img id="BLOGGER_PHOTO_ID_5309354039086009986" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 338px; CURSOR: hand; HEIGHT: 201px" alt="" src="http://4.bp.blogspot.com/_hRBLfRV9pJU/Sa6dXk6BzoI/AAAAAAAAAAc/MP-46Ll2hck/s400/hs4.gif" border="0" /></a><br /><li><em></em></li><br /><br /><li></li><br /><li></li><br /><li></li><br /></ol><p> </p><p><em> stages leading to implantation.</em></p><br /><br /><ol><br /><li>during this early stage of pregnancy, the embryo obtains ots nourishment from nutrients in the ovum and the uterus lining.</li><br /><br /><li>the sufaces of embryo and the uterus lining bind firmly to form a large disc called a <strong>placenta</strong>.</li><br /><br /><li>the job nutrishing the embryo is taken over by the placenta</li><br /><li>by eight weeks after fertilisation, the developing embryo become clearly human and is called a <strong>foetus</strong>.</li><br /><li><a href="http://3.bp.blogspot.com/_hRBLfRV9pJU/Sa6e8r6IMpI/AAAAAAAAAAk/C40XiGLSHdA/s1600-h/normal_pregnancy.gif"><img id="BLOGGER_PHOTO_ID_5309355776132264594" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 400px; CURSOR: hand; HEIGHT: 344px" alt="" src="http://3.bp.blogspot.com/_hRBLfRV9pJU/Sa6e8r6IMpI/AAAAAAAAAAk/C40XiGLSHdA/s400/normal_pregnancy.gif" border="0" /></a><br /></li></ol><br /><br /><p> </p><p> </p><p> </p><p> </p><p> </p><p> </p><p> </p><p> </p><p> <em>growth and development of the foetus in the uterus</em></p><ol><li>at the placenta, the foetal and maternal blood vessel flow very close to each other but do not mix</li><li>the foetus is attached to the placenta by the <strong>umbilical cord</strong></li><li>the umbilical cord has 2 blood vessels</li><li>an <strong>umbilical artery</strong> which carries carbon dioxide and other waste product from the foetus to the placenta</li><li>an <strong>umbilical vein</strong> carries blood containing oxygen and food from the placenta to the foetus.</li><li>oxygen, food, water and salts pass from the mother's blood into the foetal blood.</li><li>carbon dioxide and nitrogenous wates pass from the foetal blood into the mother's blood.</li><li>the foetus completely surrounded by a membrane called an amnion. the amnion is filled with the amniotic fluid</li><li>the amniotic fluid protects the embryo and later the foetus by cushioning it from physical damage</li><li>the time for the full development of a foetus forty weeks. this often called as <strong>gestation period.</strong></li><li>in human beings, <strong>birth</strong> occurs in 3 main stages:</li></ol><p> a) the expansion of the servix so that the baby's head can pass into the vagina</p><p> b) the strong contractions of the uterus which push the baby out of mother's body</p><p> c) further contractions of the uterus to expel the umbilical cord and placenta from mother's body.</p><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/4869467735213175544-8716422249838864302?l=3t1sc09.blogspot.com' alt='' /></div>suararakyathttp://www.blogger.com/profile/02892550010962704533noreply@blogger.com0tag:blogger.com,1999:blog-4869467735213175544.post-54750003661711490652009-02-25T19:51:00.000-08:002009-02-25T19:58:43.386-08:00Reproduction in the process in which individuals oroffspring are produce by existing ones.<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/4869467735213175544-5475000366171149065?l=3t1sc09.blogspot.com' alt='' /></div>suararakyathttp://www.blogger.com/profile/02892550010962704533noreply@blogger.com0tag:blogger.com,1999:blog-4869467735213175544.post-78670698262910752712009-02-25T19:30:00.000-08:002009-02-25T19:33:57.762-08:00+SELAMAT DATANG+<br /><br />MOGA MENDAPAT ILMU DI ESTREK RAKYAT JINGGA BLOGS<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/4869467735213175544-7867069826291075271?l=3t1sc09.blogspot.com' alt='' /></div>suararakyathttp://www.blogger.com/profile/02892550010962704533noreply@blogger.com0