Endoplasmic Reticulum

(Click image to enlarge in new window)

Objective: To find and learn about the Endoplasmic Reticulum!

Whew! It’s been a long journey, and now I have to search for the endoplasmic reticulum! And if you’ve already read about the nucleus and ribosome, here’s a fun fact: The endoplasmic reticulum takes up more than half of the total membrane in cells, is continuous with the nuclear envelope, and it has bound ribosomes in it. 3 organelles in one? Talk about connections in life! And if you’re note a bio geek like me, sorry, but this is awesome. Want to know why? Keep on reading!

<Scroll to bottom for correct location…>
The Endoplasmic Reticulum:

In general, the ER is a wide network of membranes that use membranous tubules and cisternae (sacs). Like the nuclear envelope, the ER also keeps the internal environment (ER lumen/cisternal space) and the cytoplasm separate. There are two types of ER, based on the presence of ribosomes: Smooth ER and Rough ER.

This is a picture of the smooth ER, rough ER, and the nuclear envelope. Notice that the rough ER has ribosomes on it (making it look "rough), while the smooth ER does not.

Extra Stuff:

General Endoplasmic Reticulum Video:

To further explore the smooth and rough ER, click on the tabs that appear when you hover your mouse over the page “endoplasmic reticulum”. You will then be guided to a more extensive explanation of these membranes!






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