1. Describe the normal events of fetal development. How does malnutrition impair fetal development? Fetal development begins with the fertilization of an ovum; the female reproductive cell, capable of developing into a new organism upon fertilization, by a sperm; the male reproductive cell capable of fertilizing an ovum. Three stages follow fertilization: the zygote, the embryo, and the fetus (Whitney & Rolfes, 2016, p. 475). The initial product of the union of ovum and sperm; a fertilized ovum, is called the zygote. It begins as a single cell and rapidly divides to become a blastocyst or the development stage of the zygote when it is about 5 days old and ready for implantation; the embedding of the blastocyst in the inner uterine wall. Cell Similarly, the Academy of Nutrition and Dietetics also advocates breastfeeding for the nutritional health of infants as well as for many other benefits it provides both infant and mother. Breast milk excels as a source of nutrients for infants that promote infant health and development throughout the first year of life. The main carbohydrate in breast milk is lactose which is easily digested and enhances calcium absorption. The carbohydrate component of breastmilk also contains abundant oligosaccharides, which are present only in trace amounts in cow milk. These oligosaccharides help protect infants from infections by preventing the binding of pathogens to the intestinal cells. The amount of protein is less than in cow’s milk but is beneficial as it places less stress on the infant’s immature kidneys to excrete urea. Much of the protein in breast milk is alpha-lactalbumin; a major protein in human breast milk, as opposed of casein, a major protein in cow’s milk, which is easily digested and absorbed (Whitney & Rolfes, 2016, p. Additionally, medicines used to treat drug abuse may affect nutrition status. Drugs such as marijuana seem to enhance the pleasures of eating, especially sweets. Prolonged use of marijuana may lead to weight gain. Cocaine and methamphetamines lead to dehydration and loss of electrolytes. These drugs may also lead to a decrease in appetite, weight loss, and malnutrition. Often the craving for these dugs replaces hunger (Whitney & Rolfes, 2016, p.
Conception is the action of conceiving a child or of a child being conceived. Every human being begins life as a single cell, formed when father's sperm fertilizes mother's egg. Fertilization normally takes place in the mother's Fallopian tube, which connects the uterus (womb) with the ovary. The uterus is the size and shape of a large pear: it is made of muscle and it stretches to allow the baby's growth throughout the months of pregnancy.
Marijuana has been proven to increase appetite which results in a weight gain for the person. For an AIDS patient, gaining weight not losing it is a main focus. In 1992, the FDA approved a pill form of THC called Marinol for AIDS patients who suffer from wasting. In a study of 139 people with AIDS, half of the people were given the Marinol and half were given a placebo. The Marinol significally improved the appetite in AIDS patients(Cowley and Hager 22). Gaining weight and keeping it on for AIDS patients is key in extending their lives. M...
You begin life as a single cell, formed when the sperm fertilises the egg. Out of all the sperm it only takes one sperm and one egg to fertilise at conception. This is called fertilization; which takes place in the Fallopian tube, the fertilized egg then divides
Breastfeeding is the most protective, nutritional, and natural way to provide nourishment to infants. Human milk contains several nutrients including: vitamins, proteins, lipids, carbohydrates and minerals. These nutrients are imperative for an infant’s developmental growth. Human milk also reduces the risk of developing morbidities, especially within premature infants. Premature infants, who are more prone to infection due their immune systems, benefit from human milk. Compared to artificial formulas, human milk provides antibodies and other beneficial nutrients to help with the development of the infant.
mother’s milk. It a practice that has been passed down from generation to generation since the beginning of our existence. It has proven to be an efficient and healthy way to feed newborns. Several research have shown numerous benefits of breastfeeding. For example, when it comes to the comparison of breast milk and formula milk, studies have shown that formula milk can be harder for babies to digest. This is due to the fact that formula milk is created from cows and babies, stomachs have a hard time digesting and adjusting to it. In addition, the overall quality of formula milk lack the critical nutritions such as antibodies, which breast milk provides to help fight of infections and prevent diseases. As a result, the benefits of
Breastfeeding is a highly debated topic amongst mothers across the world. Every mother has the choice to breastfeed or bottle fed their infant. Although everyone is entitled to their own opinion and choice, it is scientifically proven that breast milk is more beneficial for the infant’s health and development and the mother. Breast milk contains extremely beneficial vitamins and nutrients and also has the ability to change according to the infant’s growth and development. Formula companies try to mock breast milk to the best they can, although it cannot be completely composed the same. “Breastfeeding offers immunological and allergy protection to the infant, is economical and convenient as it is always fresh and the right temperature, and provides a great opportunity for the mother and infant to bond” (p. 1052, Potter & Perry, 2011). Research has proven that breast milk is the most
- The egg and sperm are placed together in a suitable medium for fertilisation to occur in a culture dish. If fertilisation does not occur after 72 hours, the oocytes (incompletely developed eggs) and sperm are disposed of. The
Is there any food on earth that can provide the PERFECT nutrition to a human? Yes, and it is breast milk. Breast milk is the perfect nutrition. This superior food contains hormones, live antibacterial and antiviral cells and essential fatty acids (What Makes Human Milk Special?, Mar-Apr 2006). All of which are helpful in protecting against any harm. Sicknesses in infants are lowered by the help that breast milk gives. Breastfed children are sick less often than children who aren’t breastfed (What Makes Human Milk Special?, Mar-Apr 2006). Breast milk contains all the nutrients that an infant needs as it continues to grow. When the child is brought into the world it has no way to fight off any d...
The Female reproduction cycle includes seven key parts; FSH, LH, estrogen progesterone, ovulation, menstruation and pregnancy. When fertilization occurs, the egg will begin to divide through mitosis. After several divisions a cluster of cells surrounding the embryo, called a blastocyst implantation .Where they attach to the uterine wall by the secretion of enzymes. Within a few days of this process the uterus will continually divide , the embryo; Releasing hormones to keep the corpus luteum functioning for a few weeks to allow nourishment and protection to reach and line the uterus. Then membrane like chorionic villi are formed to help with protection. These form an essential organ called the placenta; the connection between mother and embryo. This serves as the embryo’s main source of nourishment.
The embryos are usually extras that have been created in IVF (in vitro fertilization) clinics where several eggs are fertilized in a test tube, but only one is implanted into a woman (Crosta, Paragraph 3). The blastocyst consists of an inner cell mass (embryoblast) and an outer cell mass (trophoblast). The outer cell mass becomes part of the placenta, and the inner cell mass is the group of cells that will differentiate to become all the structures of an adult organism(Crosta, Paragraph 4). In a healthy pregnancy, the blastocyst stage continues until implantation of the embryo in the uterus, at which point the embryo is referred to as a fetus. This usually occurs by the end of the 10th week of gestation after all the primary organs of the body have been created (Crosta, Paragraph 5). Human embryonic stem cells are the cells from which all 200+ kinds of tissue in the human body originate. When stem cells are obtained from living human embryos, the harvesting of such cells necessitates the destruction of the
There are two different ways to break down the prenatal time period: by trimester or by periods. The first period is called the germinal period. This time frame consists of the first fourteen days of the baby’s development starting with conception. During these two weeks, the fertilized egg makes it’s way into the uterus for implantation in the lining of the uterus. The next period, the embryonic period starts here. The embryonic period lasts the third through the eighth week of pregnancy. During this time period, according to Kathleen Stassen Burger, Author of The Developing Person: Through Childhood and Adolescence, “…the formless mass of cells becomes a distinct being-not yet recognizably human, but worthy of a new name, embryo” (Burg...
The first period, the germinal period, is classified as the first two weeks after conception, that is identified by how fast cells divide and differentiate. During this phase a zygote duplicates. After that differentiation begins, this is where early cells take on their own characteristics and move to their predetermined locations. Once that is complete a cell mass will then become either a placenta or a nucleus, together they will become the embryo. The second period is called the embryonic period. This. Is this stage of development that occurs during the third to the eighth week after conception. During this phase, the basic structural forms of the baby's body appear. At the beginning of this period a line (the primitive streak) appears turning into the neural tube, and eventually turning into the central nervous system. in the fourth week eyes, ears, nose, mouth, and minuscule blood vessels (becoming the heart) begin to appear. Between the fifth week and the end of the embryonic period arms, legs, hands, feet, fingers, and toes appear. The final stage, the
Meiosis is a special type of cell division that occurs during formation of sperm and egg cells and gives them the correct number of chromosomes. Since a sperm and egg unite during fertilization, each must have only half the number of chromosomes other body cells have. Otherwise, the fertilized cell would have too many.
"Embryonic stem cells are derived from a four- or five-day-old human embryo that is in the blastocyst phase of development."(source). Before the embryonic stem is produced, the fertilized egg, a zygote, starts to multiply it's cells. Once the group of cells is set in the uterus, it becomes a blastocyst. The blastocyst consists of an inner and outer mass. The outer mass, the
Once the sperm fuses with the ovum both chromosomes will pair up and begin the first stages of cell division.