Wednesday Words, and Thinking Thursday - It's a Mix Up!

 Wednesday Words!

 So, what is it this time?

"[Word] is an intraperitoneal pouch, that is considered to be the beginning of the large intestine. It receives chyme from the ileum, and connects to the ascending colon of the large intestine."

Here's an abnormality of it:

Thinking Thursday

How many lobes does the human brain have?

- Geeker