User: You are given access to make searches on the Internet. The format for making a search is: 1. The user sends a message. 2. You will decide whether to make a search. If you choose to make a search, you will output a single message, containing the word 
 (EXACTLY AS IT IS GIVEN TO YOU), followed by ONLY your web search query. After outputting your search query, you MUST output the token 
 (EXACTLY AS IT IS GIVEN TO YOU) to denote the end of the search query. Keep your search query concise as there is a 400 characters limit.
The system will then append the web search results at the end of the user message, starting with the token 
. Take note that the user CANNOT ACCESS the content under 
 - YOU should incorporate these results into your response. Additionally, If the token 
 is present in the user's message, then you MUST NOT request another web search.

IMPORTANT! You should choose to search the web ONLY if ANY of the following circumstances are met:
1. User is asking about current events or something that requires real-time information (news, sports scores, 'latest' information, etc.)
2. User is asking about some term you are unfamiliar with (e.g. if it's a little-known term, if it's a person you don't know well, etc.)
3. User is asking about anything that involves numerical facts (e.g. distances between places, population count, sizes, date and time, etc.)
4. User explicitly asks you to search or provide links to references.
If the user's query does NOT require a web search, YOU MUST NEVER run one for no reason.
However, NEVER refuse to search the web if the user asks you to provide such information.

When using web search results, you are encouraged to cite references where appropriate, using inline links in standard markdown format.
You are also allowed to make use of web search results from previous messages, if they are STRONGLY RELEVANT to the current message.

When you are not running a web search, respond completely as per normal - there is NO NEED to mention that you're not searching. 
Do your best to be informative. However, you MUST NOT make up any information. If you think you might not know something, search for it.

Assistant: Understood. I will strictly follow these instructions in this conversation.
User: how does the zygote become the blastocyst


 for "how does the zygote become the blastocyst":

1.
URL: https://my.clevelandclinic.org/health/body/22889-blastocyst
Title: Blastocyst: Definition, Stage &amp; Implantation - Cleveland Clinic
Content: A <b>blastocyst</b> is a cluster of dividing cells made by a fertilized egg. It's the early stage of an embryo. A <b>blastocyst</b> is one step among many that lead to a pregnancy. A <b>blastocyst</b> forms about five to six days after a sperm fertilizes an egg. Layers of cells in the <b>blastocyst</b> divide and separate. They eventually <b>become</b> <b>the</b> structures that ...

2.
URL: https://www.whattoexpect.com/getting-pregnant/prepping-for-pregnancy/what-is-a-zygote
Title: What Is a Zygote and How Is It Formed? - What to Expect
Content: A <b>zygote</b> is a fertilized egg. [1] It's created when sperm meets an egg in one of the fallopian tubes. When the sperm mixes with the egg, you conceive, and the result is the <b>zygote</b>. A <b>zygote</b> contains all the genetic information (DNA) that's required to create a little human being. Half of that comes from the egg, while the other half comes ...

3.
URL: https://www.merckmanuals.com/home/women-s-health-issues/normal-pregnancy/stages-of-fetal-development
Title: Stages of Fetal Development - Stages of Fetal Development - Merck ...
Content: Fertilized egg (<b>zygote</b>) divides and develops into a hollow ball of cells called the <b>blastocyst</b>. <b>Blastocyst</b> implants in the wall of uterus. 3. Outer cells of <b>blastocyst</b> develop into placenta and amniotic sac. Inner cells of <b>blastocyst</b> develop into embryo. 4. Neural tube, the area that will <b>become</b> <b>the</b> brain and spinal cord, begins to develop.

4.
URL: https://embryology.med.unsw.edu.au/embryology/index.php/Blastocyst_Development
Title: Blastocyst Development - Embryology
Content: (Greek, blastos = sprout + cystos = cavity) or blastula, the term used to describe the hollow cellular mass that forms in early development. The <b>blastocyst</b> consists of cells forming an outer trophectoderm (TE, trophoblast) layer, an inner cell mass (ICM, embryo blast) and a blastocoel (fluid-filled cavity). The inner cell mass will form the entire embryo, and is the source of true embryonic ...

5.
URL: https://askabiologist.asu.edu/embryo-tales/embryo-growth
Title: Stages of Fetal Development - Ask A Biologist
Content: Around the end of that week, the <b>blastocyst</b> should implant, or attach, in the uterine wall. That's where it will grow for the rest of pregnancy. About 10 to 12 days after fertilization, the <b>blastocyst</b> is considered an embryo. When an embryo is three weeks old, a spine begins forming, as does the tissue that will <b>become</b> <b>the</b> heart.

6.
URL: https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/prenatal-care/art-20045302
Title: Fetal development: The 1st trimester - Mayo Clinic
Content: During fertilization, the sperm and egg unite in one of the fallopian tubes to form a <b>zygote</b>. Then the <b>zygote</b> travels down the fallopian tube, where it <b>becomes</b> a morula. Once it reaches the uterus, the morula <b>becomes</b> a <b>blastocyst</b>. <b>The</b> <b>blastocyst</b> then burrows into the uterine lining — a process called implantation.

7.
URL: https://www.parents.com/what-is-a-zygote-7112279
Title: What Is a Zygote? How It Forms and Becomes an Embryo - Parents
Content: Identical Twins. Identical twins are formed when one egg is fertilized by one sperm in the fallopian tube, forming a single <b>zygote</b>. Before implantation, in the <b>blastocyst</b> phase, it splits into two ...

8.
URL: https://www.ncbi.nlm.nih.gov/books/NBK554562/
Title: Embryology, Week 1 - StatPearls - NCBI Bookshelf
Content: Human embryogenesis is a complicated process by which a fertilized egg develops into an embryo. During the first eight weeks of development, the conceptus shifts from a single-celled <b>zygote</b> into a multi-layered, multi-dimensional fetus with primitively functioning organs. The continued growth and increased intra-embryonic complexity during the first eight weeks of development are highly ...

9.
URL: https://biologydictionary.net/blastocyst/
Title: Blastocyst - Definition, Implantation Timeline and Quiz | Biology ...
Content: A <b>blastocyst</b> forms when a fertilized egg is in its second phase of growth. This takes place from days five to nine after fertilization. This is a big step for the little organism. <b>Blastocysts</b> follow after the morula phase, which is when the egg <b>becomes</b> a solid ball of cells until day three. At this point, the growing embryo needs space!

10.
URL: https://opentextbc.ca/biology/chapter/24-6-fertilization-and-early-embryonic-development/
Title: 24.6. Fertilization and Early Embryonic Development
Content: Fertilization, pictured in Figure 24.23 a is the process in which gametes (an egg and sperm) fuse to form a <b>zygote</b>. <b>The</b> egg and sperm each contain one set of chromosomes. To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. In mammals, the egg is protected by a layer of ...

11.
URL: https://www.babycenter.com/pregnancy/your-baby/what-is-a-zygote_41001712
Title: What is a zygote? | BabyCenter
Content: A guide to the single cell that starts a pregnancy. When a sperm fertilizes an egg, a <b>zygote</b> is formed - and pregnancy begins. A <b>zygote</b> is the very first form your baby takes - before they're even in the womb. Read on to find out <b>how</b> and when a <b>zygote</b> forms and <b>how</b>, if all goes well, it will <b>become</b> a <b>blastocyst</b>, embryo, fetus, and then baby.

12.
URL: https://en.wikipedia.org/wiki/Blastocyst
Title: Blastocyst - Wikipedia
Content: <b>Blastocyst</b>. <b>The</b> <b>blastocyst</b> is a structure formed in the early embryonic development of mammals. It possesses an inner cell mass (ICM) also known as the embryoblast which subsequently forms the embryo, and an outer layer of trophoblast cells called the trophectoderm. [1][2] This layer surrounds the inner cell mass and a fluid-filled cavity or ...

13.
URL: https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
Title: Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinic
Content: A sperm and egg join and create a <b>zygote</b>. Week 4: The tiny bundle of cells turns into a <b>blastocyst</b> and implants into your uterine lining. The beginning of what will <b>become</b> <b>the</b> placenta forms. A water-tight sac forms around the <b>blastocyst</b>. This is the amniotic sac, and it provides cushioning to a fetus during pregnancy.

14.
URL: https://medlineplus.gov/ency/article/002398.htm
Title: Fetal development: MedlinePlus Medical Encyclopedia
Content: <b>The</b> <b>zygote</b> spends the next few days traveling down the fallopian tube. During this time, it divides to form a ball of cells called a <b>blastocyst</b>. A <b>blastocyst</b> is made up of an inner group of cells with an outer shell. The inner group of cells will <b>become</b> <b>the</b> embryo. The embryo is what will develop into your baby.

15.
URL: https://humanap.community.uaf.edu/2020/04/16/the-differences-between-a-zygote-blastocyst-embryo-fetus/
Title: The Differences Between A Zygote, Blastocyst, Embryo, &amp; Fetus
Content: First, once the sperm and egg meet, a <b>zygote</b> forms. It is 2 cells, with 23 male and 23 female chromosomes. It then through mitosis begins to go through cell division. Once divided into 16 cells, a <b>blastocyst</b> begins to forms. This ball of cells attaches itself to the uterine wall, where it begins to gain all of its vital nutrients from.


Assistant: