The germinal stage is the first to occur and begins when the mother’s egg is fertilized by the sperm of the father. This naturally happens in one of the two fallopian tubes. After the egg is fertilized it is called a zygote. The zygote will begin to move from the fallopian tube into the uterus. About 24 to 36 hours after fertilization, cell division will begin.
Development throughout life stages Kieran O’Connor Kieran O’Connor Unit 4 Conception, pregnancy and birth Conception A Human life begins with conception this is when a fertile women will usually produce one egg cell each month then roughly two weeks, after the last menstrual period, the egg cell will travels from the ovary, and it will go along the fallopian tube going towards the women’s uterus. If the woman has sexual intercourse when the egg is in the fallopian tube there is a possibility of there being conception when having sexual intercourse. The man during orgasm will ejaculate millions of sperm, but it is just one sperm that will fertilise the egg. Fertilisation means that the genetic material from the male that is contained within the sperm what has 23 chromosomes joins the genetic material from the female’s egg what has 23 chromosomes, and so that when they join to form a zygote when fertilization occurs, the zygote will have a total of 46 chromosomes. What make up the DNA of the human body.
Conception to Birth About one month before conception almost all adult produce thousands of sperm each second. The number of chromosomes in each sperm produced is half the normal number 23 instead of 46. They take a month or so to travel from a testicle through a long tube. Each sperm counts human DNA but only one complete a set of chromosomes. One day before conception the woman ovulates and produces one mature ovum.
Fish becomes sexually mature when two to three years old with about 30 cm length. Eggs may be obtained many times from the same flounder female during its spawning cycle, at intervals of two to eight days. A female spawner with about 2.5 to 4 kg can lay a total of about 3 million eggs in the spawning season, through successive batches of 40 000 to 450 000 eggs each. The hatching of fertilized eggs occurs after about 63 hours at 14 to 16°C producing fragile yolk sac larvae from 2.1 to 2.3 mm long with no functioning eye or mouth. It may be of interest to know that during larval development, when the water temperature is of 20°C, larvae become females and in order to increase the proportion of males, water temperature should be maintained between 15 and
)Chlamydia, HPV, Herpes Answer=A UNDERSTANDING HUMAN SEXUALITY CHAPTER 6 QUESTIONS 1. During intercourse after ejaculation the sperm travels through what part of the females body before uniting with the female egg? A. Uterus 2. When sperm unties with egg it is called what once fertilized? A. Zygote 3.
The lining itself consists of glandular epithelium, connective tissue, and blood vessels. The endometrium has two layers, the basal and inner functional layers. The functional layer, according to the uterine cycle, varies in thickness. It helps form the placenta, supplying the nutrients needed for the development of the embryo. The myometrium is a very thick, muscular, middle layer composed of smooth muscle.
Identical, or monozygotic, twins develop from a single egg/sperm combination that splits a few days after conception. Their DNA originates from a single source, thus their genetic makeup is the same and the characteristics that are determined by genetics will be similar. Monozygotic twins are always of the same gender, except in extremely rare cases of chromosomal defect. On the other hand, fraternal, or dizygotic, multiples form when two separate eggs are fertilized by separate sperm in a single ovulation cycle. They are no more alike than any sibling set, sharing about 50% of their genetic markers in a unique combination of genes from both parents.
During this period, the organism grows vastly in size. But right before the fetus is formed, the eyes, ears, nose, jaw and neck form along with the arms, legs, fingers, and toes. The internal organs are more distinct as intestines grow, the heart develops spate chambers, and the liver and spleen take over red blood cell production. The video went on to say that after two months, an embryo becomes a fetus. It also said that the fetus’s heart beats twice as fast as an adult.
Infancy and Early Childhood Development Theresa Clemons Psychology 375 March 11, 2013 Professor Lindsey Respress Infancy and Early Childhood Development Development of a child begins in the womb. The human fetus is defined as the unborn human during the stage of development. In this stage the fetus develops organs and grows many times its size during this time (E how Family, 2011). Once the child is born it is even more important that the environment is conducive for normal infant physical and mental growth. Infants experience the majority of its growth during the first year.