The Conception Process Of A Sperm Cell

At age two, most of the child's brain is not fully developed, it is seventy-five percent of adult weight. At age five the brain is ninety-five percent of adult weight. Based on solid scientific evidence, the brain is not a completed organ at birth. Post mortem studies reveal that myelination - one of the five basic processes that make up brain development begins in the brain stem and cerebellum before birth but is not completed in the frontal cortex of the brain until late adolescence period. Myelination process begins before birth, that is during the prenatal period - it is the first process to occur in brain development. Myelin, a fatty layer accumulates around nerve cells to allow nerve impulses to move more quickly - protecting the neuron and acting like an insulation for the human brain. The cerebral hemispheres are the first myelinated. By the second year, the cerebrum is completed. During the process of brain development, there is an increase in the axonal connection which contributes to the growth of the brain. According to neuroscientists, the brain is divided into two- the right hemisphere and the left hemisphere. The left side of the body is controlled by the right hemisphere, while the left side of the brain which is the dominant part controls the right side of the

The latest research into development and learning of babies and young children shows that early stimulation are vital to the healthy development of brain. Babies are born with 100 billion neuron cells and they need to connect together in order to function. Many of these connections are made as result of what a baby senses and experiences. Stimulation, sufficient sleep and healthy diet makes a difference in allowing connections to be made. Development of brain begins well before birth. Neurons (cells in the brain which transmit electrical impulses to other cells) are formed between the 10th and 20th week of pregnancy. These cells are critical as they will later join together to allow the brain to function properly. Electrical pulses pass between cells via dendrites and axons which causes the connection between the neuron cells. The dendrites and axons of the neurons develop and begin the process of joining up in the final two months of pregnancy. Those that have not made enough strong connections are killed off and this is one reason why some children are

Babies grow and change so much in the first two years of life, and many of those growth are directly related to the brain. Brain grows so rapidly than any other organ and reaches 75% by the age of 2. Communication within the central nervous system and spinal cord begins with neurons. The final part of the brain prefrontal cortex matures.

Pregnancy is a nine month process and it starts when the sperm penetrates an egg. One and a half days later the single fertilised egg begins to divide. After two to three days there are enough new cells to make the egg the size of a pin head.

The prenatal period takes place in the first two weeks of conception. Heredity and environmental influences (which are often negative) are also developed during this stage. At this stage the organism is more susceptible to these influences, than during any other period. Infancy is the next stage, various changes start to occur and attachments start to form. Coordination, sensory and motor skills start to develop, as well as the expression of

|  Neurons begin developing in the early stages, like when a child is in the womb. Language and early stimulation is also tied in how children will interact. Interactions on a daily basis can stimulate a child’s brain.

S: Page 134 is all about the embryonic period of pregnancy. The embryonic period lasts from week 3 to week 8, and it is a very important time because that is when the ectoderm, mesoderm, and endoderm are being formed. The ectoderm, mesoderm, and endoderm will later for more important oragans and body structures.

Biological development of a fetus is vary rapid and complex over the nine-month period in the womb. When both the male spermatozoon and the female ovum combine it forms what is called a zygote which holds the twenty-three pairs of chromosomes. The zygote or the embryo undergoes cell division and makes its way to the uterine wall to implant itself, this process is completed about ten days after conception. By the end of the eighth week the organ systems have formed and human characteristics can start to be noticed. From the eighth week until birth the embryo is now labeled a fetus. Quickening can occur from the sixteenth week until birth, this is where the mother can feel the fetus moving. Around the twenty-second week viability can take place, this is where the fetus can survive outside the womb. The nine-month period of being pregnant is split into different trimesters. With the different trimesters there are different abortion procedures can be used to remove the fetus.

The egg cells, or ova, develop in the ovaries. The ovaries not only produce eggs cells but also estrogen which is important for female reproduction. Estrogen is a term meaning several hormones which promote changes

Important stages of pregnancy: Pregnancy is counted from the first day of the mother 's last period. Important development immediately takes place after fertilisation of egg and sperm cells. It divides into many cells in the first week, which forms a zygote made out of 100 to 150 cells that are already differentiating. In the second week, the zygote is then changed to an embryo and it sticks to the uterine wall. This process takes up to nine months to form and develop a baby.

[1] "Development of the embryo begins at Stage 1 when a sperm fertilizes an oocyte and together they form a zygote."

Embryonic brain development begins a few weeks after conception through the processes known as gastrulation and neurulation (Gilbert, 2000). During gastrulation the embryo changes from a simple group of cells to a multi-layered organism. Three germ layers are formed during this process: the endoderm, mesoderm, and ectoderm (Gilbert, 2000). The endoderm is the most inner layer and forms the lining of internal organs. The mesoderm is the middle layer which forms the skeletal, muscle, and circulatory systems. The ectoderm is the outer most layer which forms the skin, brain and nervous system.

Although most of the nervous system is developed by the time a baby is born, the development extends beyond birth. The development of this system is complex and involves many processes and phases that form what we know as our nervous system, allowing humans to think, feel, move, and function in many different and unique ways. Through a biological scope, we know that there are three phases of the developmental process. This first phase occurs during the first week and is known as the “germinal stage, the next 7 weeks of pregnancy are the embryonic period, and the final 32 weeks (weeks 9-40) are the fetal period” (Rouse, 2016). At the embryonic stage “the inner cells rearrange themselves into a disk which the embryo forms” (Rouse, 2016). The

A newborns brain growth is rapid and their growth and development reflects their experiences and social relationships (Berger,2014). From two weeks after conception until two weeks after birth the brain grows more rapidly than any other organ in the body (Berger,2014). We will now examine what biologically takes place inside the brain of an infant to better try to understand why development at this stage is so crucial. A newborns brain has billions of neurons, that are located in the portion of the brain called the Cortex, and they regulate and control thought, feeling, and sensation (Berger, 2014). In addition, research has found that children younger than

During the first two years the brain is the most flexible and prepared to learn. At this time everything is new. Everything an infant does build brain connections. According to EDUCARER.org "Touch, talking and things an infant sees and smells all build connections if done with continuity in a loving, consistent, and