Know Your Body For Motor Neurone

[puzzld]

Struggling with the last 4 of these, all answers are parts of the body.
The quiz is for Motor Neurone and the closing date is Saturday 17th June 2017.
8) We sat around hot liquid (5)
13) Had a triumphal March within blood lined hallway (5)
55) Crease (7)
69) Many types, largely split into compound and non-compound (3)
Thanks in advance

[cashier]

E8. Sweat. Anag

[Captain2]

8 Sweat - anagram of we sat

[Baldric]

55 WRINKLE ??

[cashier]

55. Wrinkle

[chiaroscuro]

69 eye

[JJ109]

Are you sure that 13 is not 6 letters?
ATRIUM is hidden in the clue ....Had (A TRIUM)phal March.....
An atrium is a "chamber" of the heart and will have blood lined "hallways"

The plural of atrium is ATRIA(5 letters) but the clue sounds like the answer wanted is ATRIUM.