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: whats epithelium and endothelium again


 for "whats epithelium and endothelium again":

1.
URL: https://pediaa.com/difference-between-epithelial-and-endothelial-cells/
Title: Difference Between Epithelial and Endothelial Cells
Content: Epithelial cells line the external surfaces of the body as well. Endothelial cells mainly line the cavities of the circulatory system. Epithelial cells can be either simple or stratified and squamous, cuboidal or columnar. Endothelial cells are simple squamous epithelial cells. The main difference between epithelial and endothelial cells is ...

2.
URL: https://biologywise.com/difference-between-endothelial-cells-epithelial-cells
Title: The Vital Difference Between Endothelial Cells and Epithelial Cells
Content: However, both the cells that form the tissue act like an interface between the underlying layer and the outside environment. Endothelial cells lie 'inside' the body as they are located in the blood vessels. On the other hand, epithelial cells are often described as lying 'outside' the body as they also coat the outer layer (epidermis ...

3.
URL: https://my.clevelandclinic.org/health/articles/22062-epithelium
Title: Epithelium: What It Is, Function &amp; Types - Cleveland Clinic
Content: The <b>epithelium</b> is a type of body tissue that forms the covering on all internal and external surfaces of your body, lines body cavities and hollow organs and is the major tissue in glands. Epithelial tissue has a variety of functions depending on where it's located in your body, including protection, secretion and absorption.

4.
URL: https://thisvsthat.io/endothelial-cells-vs-epithelial-cells
Title: Endothelial Cells vs. Epithelial Cells - What&#x27;s the Difference? | This ...
Content: Endothelial cells line blood vessels and control the exchange of substances between the blood and tissues, while epithelial cells line various organs and have diverse functions depending on their location. Understanding the attributes of endothelial cells and epithelial cells is crucial for comprehending their roles in health and disease, and ...

5.
URL: https://my.clevelandclinic.org/health/body/23471-endothelium
Title: What is the Endothelium? - Cleveland Clinic
Content: Your endothelial cells make up the lining of your blood vessels. They're the cells that come into direct contact with your blood. They're attached to a structure called your basal lamina. Together, your <b>endothelium</b> <b>and</b> your basal lamina form the innermost layer of your blood vessel wall (the tunica intima).

6.
URL: https://www.kosheeka.com/epithelial-and-endothelial-cells-how-do-they-differ/
Title: Epithelial and Endothelial Cells- How Do They Differ?
Content: Other Differences. Endothelial cells are supported by vimentin filaments while epithelial cell structures are supported by keratin filaments. If your lab is working on epithelial and endothelial cells, procure these tissue-specific primary cells without any hassle at Kosheeka by contacting us at info@kosheeka.com.

7.
URL: https://www.varsitytutors.com/ap_biology-help/understanding-epithelial-and-endothelial-cells
Title: AP Biology : Understanding Epithelial and Endothelial Cells
Content: One additional function of endothelial cells is involvement in blood clotting. <b>Endothelium</b> generally lines fully internal pathways (such as the vascular system), while <b>epithelium</b> generally lines pathways that are open to the external environment (such as the respiratory and digestive systems). Nerve cells are specialized for signaling, and red ...

8.
URL: https://open.oregonstate.education/aandp/chapter/4-2-epithelial-tissue/
Title: 4.2 Epithelial Tissue - Anatomy &amp; Physiology - Open Educational Resources
Content: Epithelial Tissue Function: Epithelial tissues provide the body's first line of protection from physical, chemical, and biological damage. The cells of an <b>epithelium</b> act as gatekeepers of the body, controlling permeability by allowing selective transfer of materials across its surface. All substances that enter the body must cross an <b>epithelium</b>.

9.
URL: https://biologydictionary.net/endothelium/
Title: Endothelium - Definition, Function, Examples &amp; Quiz - Biology Dictionary
Content: <b>Endothelium</b> Definition. The <b>endothelium</b> is a layer of cells that lines the blood vessels and lymph vessels of the body. Although you probably don't know it exists, your <b>epithelium</b> is vital to keeping you alive! It includes all blood-<b>and</b>-lymph carrying vessels, including the chambers of the heart and the glomeruli, or "filters," of the ...

10.
URL: https://www.kenhub.com/en/library/anatomy/overview-and-types-of-epithelial-tissue
Title: Epithelial tissue: definition, functions &amp; examples | Kenhub
Content: <b>Epithelium</b> is one of only 4 types of human body tissues.Like all types, it is formed by cells within an extracellular matrix (ECM). The cells in this tissue are tightly packed within a thin ECM. Forming sheets that cover the internal and external body surfaces (surface <b>epithelium</b>) <b>and</b> secreting organs (glandular <b>epithelium</b>). Functions of epithelial tissue are secretion, protection, absorption ...

11.
URL: https://bio.libretexts.org/Courses/Lumen_Learning/Anatomy_and_Physiology_I_(Lumen)/07%3A_Module_5-_The_Tissue_Level_of_Organization/7.03%3A_Epithelial_Tissue
Title: 7.3: Epithelial Tissue - Biology LibreTexts
Content: The <b>endothelium</b> is the epithelial tissue that lines vessels of the lymphatic and cardiovascular system, and it is made up of a single layer of squamous cells. Simple squamous <b>epithelium</b>, because of the thinness of the cell, is present where rapid passage of chemical compounds is observed. The alveoli of lungs where gases diffuse, segments of ...

12.
URL: https://med.libretexts.org/Bookshelves/Anatomy_and_Physiology/Human_Anatomy_(OERI)/03%3A_Tissue_Level_of_Organization/3.03%3A_Epithelial_Tissue
Title: 3.3: Epithelial Tissue - Medicine LibreTexts
Content: The <b>endothelium</b> is the epithelial tissue that lines vessels of the lymphatic and cardiovascular system, and it is made up of a single layer of squamous cells. Simple squamous <b>epithelium</b>, because of the thinness of the cell, is present where rapid passage of chemical compounds is observed. The alveoli of lungs where gases diffuse, segments of ...

13.
URL: https://www.askdifference.com/endothelium-vs-epithelium/
Title: Endothelium vs. Epithelium — What&#x27;s the Difference?
Content: While <b>endothelium</b> is a singular layer of cells, <b>epithelium</b> can vary in shape and layers, being simple or stratified. The <b>endothelium</b> serves primarily in the exchange of substances between the bloodstream and surrounding tissues. <b>Epithelium</b> protects surfaces, absorbs nutrients, and secretes substances. <b>Endothelium</b> is involved in the creation of ...

14.
URL: https://www.osmosis.org/answers/epithelial-tissue
Title: Epithelial Tissue: What Is It, Where It&#x27;s Found, and More - Osmosis
Content: Surface epithelial tissue is found throughout the body covering all surfaces both inside and outside of the body. Each cell type is prominent in specific locations. Single-layered epithelial tissue is often found along the linings of organs. Simple cuboidal <b>epithelium</b> is typically found in the lining of kidney tubules and glandular ducts.

15.
URL: https://microbenotes.com/endothelial-cells/
Title: Endothelial Cells: Definition, Types, Structure, Functions - Microbe Notes
Content: Endothelial cells can be categorized into two types based on their location and function: vascular endothelial cells and lymphatic endothelial cells. 1. Vascular Endothelial Cells. Vascular endothelial cells (VECs) are a type of endothelial cells that cover the inside walls of blood vessels, such as capillaries, veins, and arteries, and act as ...


Assistant: