Birth And Blood Cells Are Formed ( Tb ) ( Circulation )

In the first month of pregnancy head and trunk appear and tiny arm buds begin to form, followed by leg buds. The early embryo seems to have a "tail", but this is really a protective covering for the spinal cord because the central nervous system (brain, spine and spinal cord) is so important. At this point of development the structures that eventually form the face and neck are becoming

Anything a mother consumes will affect her baby’s health, either positively or negatively. After the sperm enters into the egg, instantly, the baby begins to grow inside of the placenta, which is inside of the mothers’ uterus. “The placenta has been described as a pancake-shaped organ that attaches to the inside of the uterus and is connected to the fetus by the umbilical cord.” As the placenta produces the hormones for the baby, it also supplies the blood to the fetus from the mother. The most important element that allows the fetus to grow is the umbilical cord. The umbilical cord is composed of three blood vessels that attach to the placenta and the fetus. All of these components help the baby’s growth, but the amniotic sac, which is composed of amniotic fluid, helps protect the fetus. The amniotic fluid helps the baby maintain a regular body temperature that

The creation of a human being is a remarkable event in itself, and given the sheer magnitude of the developmental changes that take place for the fetus in such a short amount of time is nothing short of amazing. Tracking the development of a fetus is primarily broken down week by week. Although we often generalize into nine months or three trimesters, it takes places over the course of approximately 37 to 41 weeks. The gestation period is the time span between conception and birth, and while it is difficult to pinpoint the exact moment of conception we typically consider the beginning of a pregnancy to be the first day of the woman’s last period or menstrual cycle.

Supportive Structures Form- When an embryo forms, supportive structures develop that are crucial for proper growth. These structures support and protect these developmental embryos. Some of these structures are the umbilical cord, amniotic sac, the placenta, yolk sac, chorionic villi, and the allantois. During the third week of embryonic development after conception, chorionic villi connect to the uterine wall, which provide maximum contact with maternal blood. They sprout from chorion, are an essential element in pregnancy and a product of conception. Branches of the umbilical arteries carry embryonic blood to the villi. Although the mother’s blood is in contact with the embryo’s villi, the systems

Fetal circulation is the pathway of blood circulation in the fetus (Anderson, 2002). The placenta has an amniotic filled sac attached to it called the amniotic sac. The placenta starts growing in the third week that a woman is pregnant. It starts functioning at four weeks of pregnancy. The normal growth and development of the fetus is the responsibility of an organ of pregnancy called the placenta. The umbilical cord secures the fetus to the placenta. Two arteries and one vein make up the umbilical cord. The placenta links the fetus to the uterine wall of the mother so that the mother and fetus can exchange nutrition and oxygen, as well as eliminating carbon dioxide and other waste products.

At 8 cells it will start dividing up but only into tighter cells around it and this will create a wall where the baby will be grown inside of. A you know the sperm cell has settled in the next step is the creating of the placenta. The placenta starts to form around which is what is used to nourish a baby. While this is occurring the embryo is making its way down the fallopian tube where it will bury itself into the wall of the womb. This stage where the embryo connects to the wall of the womb is called implantation. By this time the embryo is letting out chemicals into the body that travel around which help show that you are pregnant in the pregnancy tests. From there the embryo will start to develope different cells and

Throughout the human experience, one of the most complex adaptations is the transition from intrauterine to

At the moment of birth the placenta (previously responsible for mediation in the respiratory, circulatory and hepatic functions between mother and a developing baby) is removed from the circulation and the neonates body must make several adjustments to undertake the respiratory and hepatic system roles as well as direct blood into its lungs to oxygenate it.

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

The mother’s body sustains the heart of its unborn child; that in itself is poetic. The cardiovascular system is the first (dual) system to form during pregnancy. The heart and a nascent circulatory system will form during the first few weeks of gestation. Between the 4th and 5th week of gestation the heart is now beating at a sturdy pace and blood flow has begun in the main vessels. By week ten of a pregnancy, the heart has fully formed, with two atria, two ventricles, and two blood vessels to carry blood from the heart, the aorta, and pulmonary artery. Circulation differs between babies and fetuses, because a fetus is incapable of using its lungs to breathe. A majority of fetal blood does not pass through the lungs but rather pushed through

During these 3 months of the first trimester the Blastocyst has undergone many changes. The umbilical cord has not been attached. After the umbilical cord has attached the ,Blastocyst is now called an Embryo.The last major change the Embryo has gone through is the development of some major organs. The brain and spine and heart are starting to significantly develop.

At this point your baby is just a little bigger than a pencil eraser. At week eight growth continues with the arms, legs, fingers and ears. My eyes are visible and my lips and nose have formed. The trunk of my body is getting stronger! Over the next two weeks my arms are developing along with other body parts, my head becomes more round and my neck is developing. Approaching the end of trimester one, my body is growing rapidly and I am officially a fetus. Isn’t that rewarding? My eyes are widely separated, red blood cells are forming in the liver and at the end of the week my extra genitalia will develop into a clitoris and labia majora. Now we are at twelve weeks, I am developing fingernails and my face has a human profile. Congratulations mom, you are one third of the way there!

During the germinal stage the organism divides, becomes more complex and is located by itself in the wall of the uterus. The union to the uterus marks the end of the germ stage and occurs approximately 2 weeks after conception. Within 36 hours after fertilization, the zygote with a single cell that will be the baby enters a period of rapid cell division mitosis seventy and two hours after fertilization, has been divided into 32 cells

First, we must look at the prenatal development. The pregnancy development is one of the processes that can determine children’s psychological and physical conditions. The first trimester of conception to four weeks the “zygote” begins to develop the spinal cord, nervous system, gastrointestinal system, hearts and lungs. By eight weeks the zygote is then referred to as the embryo. At this time within the embryo the face is forming with eyes, ears, mouth, and tooth buds; the brain is forming as well as the arms and legs and the heartbeat can be heard. Twelve weeks after the conception the embryo is now called a fetus and is about three inches long, and weighs one ounce. Normally, the fetus will have arms, legs, fingers, and toes movements. The fetus can smile, suck, and swallow and sex can be noticeable (Santrock, 2015).

The placenta is an internal organ that grows during pregnancy, in normal cases it is attached to the lining of the stomach all through-out pregnancy. It is an endocrine organ that only grows during pregnancy and provides the unborn child blood supply of its own apart from the mothers. The blood supply and nutrients are transferred via the umbilical cord to the child, it is responsible for keeping the baby healthy while inside the womb. The organ works like a regular cycle, it washes the nutrients and oxygen that travels from the mother’s body to the placenta and through the umbilical cord to the fetus. The fetus then disposes the waste products, such as carbon dioxide, back to the placenta where the mother uses bodily functions to dispose of them, it also contains hormones that help the unborn child cultivate and mature.