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: is the vena cava a vein


 for "is the vena cava a vein":

1.
URL: https://my.clevelandclinic.org/health/body/22619-vena-cava
Title: Vena Cava: Function and Anatomy - Cleveland Clinic
Content: Your superior <b>vena</b> <b>cava</b> <b>is</b> <b>a</b> large <b>vein</b> that doesn't have a valve. Your inferior <b>vena</b> <b>cava</b> <b>is</b> <b>a</b> large and long <b>vein</b> that has one valve where it meets your right atrium. How big is the <b>vena</b> <b>cava</b>? These are your body's largest <b>veins</b>. Your superior <b>vena</b> <b>cava</b> <b>is</b> 7 centimeters long (almost 3 inches) and 2 centimeters (less than 1 inch) wide.

2.
URL: https://www.webmd.com/heart/vena-cava-what-to-know
Title: Vena Cava: Function, Location, and Health Problems - WebMD
Content: <b>The</b> <b>vena</b> <b>cava</b> <b>is</b> <b>a</b> large <b>vein</b> that collects blood from either the upper or lower half of your body and transports it to the heart. Learn about its function, location, and health problems that affect it.

3.
URL: https://www.verywellhealth.com/inferior-vena-cava-anatomy-4688365
Title: Inferior Vena Cava: Anatomy, Function, and Significance - Verywell Health
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> (IVC) is a large <b>vein</b> that returns blood from the lower body to the heart. It has no valves and can have some variations in structure, such as a left IVC or a double IVC.

4.
URL: https://en.wikipedia.org/wiki/Venae_cavae
Title: Venae cavae - Wikipedia
Content: In anatomy, the venae cavae (/ ˈ v <b>i</b>ː n i ˈ k eɪ v i /; [1] sg.: <b>vena</b> <b>cava</b> / ˈ v <b>i</b>ː n ə ˈ k eɪ v ə /; from Latin 'hollow <b>veins'</b>) [2] are two large <b>veins</b> (great vessels) that return deoxygenated blood from the body into the heart.In humans they are the superior <b>vena</b> <b>cava</b> and the inferior <b>vena</b> <b>cava</b>, and both empty into the right atrium. [3] They are located slightly off-center, toward ...

5.
URL: https://www.britannica.com/science/vena-cava
Title: Vena cava | Anatomy, Function &amp; Location | Britannica
Content: <b>Vena</b> <b>cava</b> <b>is</b> <b>a</b> major <b>vein</b> that carries oxygen-depleted blood to the right side of the heart in humans and other vertebrates. It has two branches: the superior <b>vena</b> <b>cava</b> that drains the head and upper body, and the inferior <b>vena</b> <b>cava</b> that drains the lower body.

6.
URL: https://www.healthline.com/human-body-maps/inferior-vena-cava
Title: Inferior Vena Cava Function, Anatomy &amp; Definition | Body Maps - Healthline
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> <b>is</b> <b>the</b> result of two major leg <b>veins</b> coming together. These leg <b>veins</b> are called iliac <b>veins</b>.. <b>The</b> iliac <b>veins</b> come together at the small of the back, at the fifth lumbar ...

7.
URL: https://www.verywellhealth.com/superior-vena-cava-5097375
Title: Superior Vena Cava: Anatomy and Related Conditions - Verywell Health
Content: <b>The</b> superior <b>vena</b> <b>cava</b> <b>is</b> <b>a</b> large <b>vein</b> that returns deoxygenated blood from the upper body to the heart. It is not a <b>vein</b>, but a venous <b>cava</b>, meaning a hollow tube that transports blood. Learn about its structure, location, function, and possible problems.

8.
URL: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8405820/
Title: The inferior vena cava: anatomical variants and acquired pathologies
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> (IVC) is the largest <b>vein</b> in the body, draining blood from the abdomen, pelvis and lower extremities. This pictorial review summarises normal anatomy and embryological development of the IVC. In addition, we highlight a wide range of anatomical variants, acquired pathologies and a common pitfall in imaging of the IVC. ...

9.
URL: https://www.kenhub.com/en/library/anatomy/inferior-vena-cava
Title: Inferior vena cava: Anatomy and function - Kenhub
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> (IVC) is the largest <b>vein</b> of the human body. It is located at the posterior abdominal wall on the right side of the aorta. The IVC's function is to carry the venous blood from the lower limbs and abdominopelvic region to the heart.. The inferior <b>vena</b> <b>cava</b> anatomy is essential due to the <b>vein's</b> great drainage area, which also makes it a hot topic for anatomy exams.

10.
URL: https://www.innerbody.com/image_dige07/card26.html
Title: The Inferior Vena Cava: Anatomy and 3D Illustrations - Innerbody
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> <b>is</b> <b>the</b> largest <b>vein</b> in the human body. It collects blood from <b>veins</b> serving the tissues inferior to the heart and returns this blood to the right atrium of the heart. Although the <b>vena</b> <b>cava</b> <b>is</b> very large in diameter, its walls are incredibly thin due to the low pressure exerted by venous blood.

11.
URL: https://en.wikipedia.org/wiki/Inferior_vena_cava
Title: Inferior vena cava - Wikipedia
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> <b>is</b> <b>a</b> large <b>vein</b> that carries the deoxygenated blood from the lower and middle body into the right atrium of the heart.It is formed by the joining of the right and the left common iliac <b>veins</b>, usually at the level of the fifth lumbar vertebra. [1] [2]The inferior <b>vena</b> <b>cava</b> <b>is</b> <b>the</b> lower ("inferior") of the two venae cavae, the two large <b>veins</b> that carry deoxygenated blood ...

12.
URL: https://study.com/learn/lesson/superior-inferior-vena-cava-function-location.html
Title: Superior &amp; Inferior Vena Cava | Definitions, Functions &amp; Location
Content: <b>The</b> inferior <b>vena</b> <b>cava</b> collects blood from the iliac, renal, lumbar, and <b>veins</b> of the reproductive organs which drain from the abdominal cavity and lower limbs, as well as the large hepatic <b>vein</b> ...

13.
URL: https://my.clevelandclinic.org/health/body/17057-your-heart--blood-vessels
Title: Great Vessels of the Heart: Anatomy &amp; Function - Cleveland Clinic
Content: Inferior <b>vena</b> <b>cava</b>: This large <b>vein</b> delivers oxygen-poor blood from your lower body into your heart's right atrium. Your great vessels are similar to other blood vessels in your body. The arteries carry blood away from your heart, and the <b>veins</b> carry blood toward your heart. However, there's a crucial difference.

14.
URL: https://www.webmd.com/heart/difference-between-arteries-and-veins
Title: Arteries vs. Veins: What&#x27;s the Difference? - WebMD
Content: Your superior <b>vena</b> <b>cava</b> carries blood from your upper body to the heart. Your inferior <b>vena</b> <b>cava</b> carries blood from everywhere below your heart. Like arteries, these two <b>veins</b> branch off into many ...

15.
URL: https://my.clevelandclinic.org/health/articles/17060-how-does-the-blood-flow-through-your-heart
Title: How Blood Flows Through the Heart &amp; Body - Cleveland Clinic
Content: Your venules are small blood vessels that link up with <b>veins</b>. Your <b>veins</b> carry blood that's now low in oxygen and full of waste back toward your heart. Blood from all your <b>veins</b> ultimately ends up in your superior <b>vena</b> <b>cava</b> and inferior <b>vena</b> <b>cava</b>. These two large <b>veins</b> empty the blood directly into your heart's right atrium.


Assistant: