Stages of Prenantal Development Essay Example

Stages of Prenantal Development Paper The intricate details of life begin with a single cell that develops into a full term fetus within approximately 38-40 weeks. The prenatal development stages outline the growth of the child and give a clearer picture of the development of the child in the womb. The course of this prenatal development is divided into three main periods:  germinal, embryonic, and fetal. The germinal/conception stage begins with conception, occurs within the first 2 weeks. This journey begins when the sperm and egg cell unite in one of the two fallopian tubes. The fertilized egg, known as a zygote, then moves toward the uterus, a journey that can take up to a week to complete. Cell division begins  and continues rapidly forming a blastocyst. Finally, the blastocyst arrives at the uterus and attached to the uterine wall, a process known as implantation. The conception stage is basically the preparatory and preliminary process of prenatal development that readies and prepares the body for the impending pregnancy. Once implantation has occur the the blastocyst is develops into an embryo. This second stage, the  embryonic period  occurs 2-8 weeks after conception. This is referred as the most important stage of prenatal devllopment as the foundational development of the embryo begins here. During this period, the rate of cell division increases, support systems for the cells form, and organs appear. The mass of cells attached to the uterine wall forms two layers and is now called the embryo. The  inner layer of cells of the embryo is the endoderm  which develops into digestive and respiratory systems. We will write a custom essay sample on Stages of Prenantal Development specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Stages of Prenantal Development specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Stages of Prenantal Development specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The  ectoderm which is the outer layer of cells will become the nervous system and sensory receptors such as ears, nose, and eyes, and skin. The middle layer known as the  mesoderm will develop into the circulatory system, bones, muscle, excretory system, and reproductive system. By the 8th week teeth and intestines start the form as well. From the 11th week onwards, the child is called a fetus, and this stage is the last of the prenatal development timeline. This stage culminates in the birth of the child. Development of the fetus continues rapidly throughout most of this period. The fetus develops hair, nails, vocal cords, genitals, hardened bones, and a functioning liver and kidneys. By about the 20th week fat starts accumulating under the skin, the heart starts pumping more amounts of blood each day, and the baby also starts experiencing hiccups. The rate of development continues slowly as other body systems such as ligaments, brain and eyes continue developing. Up to the 40th week, the main task is the formation of the lungs, as most other body parts and organs are ready. The child starts developing necessary immunities, and also starts fattening up to face the outer environment. By about the 39th week, the child will be ready to be born into this world. During pregnancy there are 3 trimesters. A trimester is referred to as a three months period. Most commonly, the first trimester is defined as from conception through week 14. The second trimester is from week 14 through week 28. And the third trimester is from week 28 through labor and deliver, which varies considerably but averages at week 40.

Word Choice All vs. All Of

Word Choice All vs. All Of Word Choice: All vs. All Of For such a short word, â€Å"all† can be complicated. It certainly has many uses! Here, though, we’re looking at one thing in particular: when to use â€Å"all of† rather than â€Å"all† by itself. Make sure you can avoid errors when using these terms by checking out our guide below. When to Use â€Å"All Of† The sense of â€Å"all† that applies here is its use as a determiner (or a predeterminer when it comes before another determiner). This means using â€Å"all† to indicate how much of something we’re discussing. For example, â€Å"all students† means â€Å"every single student,† not just some of them. As a rule of thumb, we use â€Å"all of† when â€Å"all† is a determiner and the next word in the sentence is a pronoun. When this is a personal pronoun (e.g., me, you, us, them) or a relative pronoun (e.g., whom, which), we need to â€Å"of† to make the sentence grammatical. For example: All of you were late to class. âÅ"“ All you were late to class. âÅ"â€" These are my students, all of whom were late. âÅ"“ These are my students, all whom were late. âÅ"â€" With demonstrative pronouns (e.g., this, these, those), the â€Å"of† is optional: All of these students were late. âÅ"“ All these students were late. âÅ"“ We can also include â€Å"of† before a noun phrase that begins with a determiner, such as the definite article (i.e., the) or a possessive pronoun (e.g., my, his, her, your, our, their). For instance: All of the students overslept. âÅ"“ All the students overslept. âÅ"“ Some style guides recommend leaving out â€Å"of† when it is optional. This will make a sentence more concise, but it is ultimately up to you. When to Use â€Å"All† By Itself So when do we need to use â€Å"all† by itself? As mentioned, you can do this when the next word is a pronoun or determiner. But there are situations when adding the â€Å"of† is not an option. These are: When â€Å"all† comes before a noun referring to an entire class of things. When â€Å"all† is used before an uncountable noun without a determiner (i.e., a noun with no plural form without a word like â€Å"the† or â€Å"my† in front). In the case of an plural noun that refers to an entire class, we would write: All cats are lazy. âÅ"“ All of cats are lazy. âÅ"â€" Here, we use â€Å"all† without â€Å"of† because â€Å"cats† refers to every possible feline, not a specific group of cats. And we would do the same if â€Å"all† came before an uncountable noun: All water is wet. âÅ"“ All of water is wet. âÅ"â€" In both cases, the â€Å"of† is not just unnecessary; it is grammatically incorrect. â€Å"All† as a Pronoun We mentioned above that â€Å"all† is always followed by â€Å"of† when the next word is a personal or relative pronoun. This only applies when â€Å"all† is a determiner. You will also see â€Å"all† used as a pronoun meaning â€Å"everyone,† â€Å"everything,† or â€Å"the only thing.† And when â€Å"all† is a pronoun, it can be combined with other pronouns without using â€Å"of†: This letter is for all whom it may concern. âÅ"“ All you need is love. âÅ"“ These sentences are both fine as â€Å"all† is used as a pronoun, not a determiner. Summary: All or All Of? When deciding whether to write â€Å"all† or â€Å"all of,† keep the following in mind: Use all of when the next word is a personal or relative pronoun. You can use either all or all of when the next word in the sentence is either a demonstrative pronoun or a noun phrase that begins with a determiner. Use all by itself when the next word in the sentence is a plural noun that refers to an entire class of things or an uncountable noun. And don’t forget to have your writing proofread! We will check your writing for errors, and we can even offer feedback on grammar and other issues.