Google Analytics is a powerful tool that tracks and analyzes website traffic for informed marketing decisions.
Service URL: policies.google.com (opens in a new window)
_gid
ID used to identify users for 24 hours after last activity
24 hours
_gat
Used to monitor number of Google Analytics server requests when using Google Tag Manager
1 minute
__utmb
Used to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.
30 minutes after last activity
__utmc
Used only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.
End of session (browser)
__utmz
Contains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server
6 months after last activity
__utmv
Contains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.
2 years after last activity
__utmx
Used to determine whether a user is included in an A / B or Multivariate test.
18 months
_ga
ID used to identify users
2 years
_gali
Used by Google Analytics to determine which links on a page are being clicked
30 seconds
_ga_
ID used to identify users
2 years
_gac_
Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
__utma
ID used to identify users and sessions
2 years after last activity
__utmt
Used to monitor number of Google Analytics server requests
10 minutes
The Circulatory System enables the heart to pump oxygen and nutrients in the blood throughout the body. Blood that has been deoxygenated is returned to the lungs to be reoxygenated. It also pumps waste products that must be transported to the kidney and liver. Your circulatory system is also responsible for temperature regulation and transporting cells (such as immune cells) and proteins.
Arteries are blood vessels that deliver blood to tissues. On the other hand, veins are blood vessels that return blood to the heart. They can be grouped into three: elastic arteries and large veins; muscular arteries and medium veins; and arterioles and venules.
Blood vessels have walls composed of three layers (or tunics): the tunica intima is the endothelium and loose connective tissue; the tunica media is the concentric layers of varying amounts of elastic fibers, smooth muscle cells, and collagen fibers; lastly, the tunic adventitia is the outer layer of connective tissue.
Reference
Histology guide. Cardiovascular System | Microscope Slides | Histology Guide. (n.d.). Retrieved from https://histologyguide.com//slidebox/09-cardiovascular-system.html