Part of the body riddle

[puzzleking123]

I'm a part of your body. Me and my friend cannot function without each other. If I was to lose my friend I would die. Apart from that we are both everlasting. What am I?

[factor-fiction]

Skeletal and muscular systems?
Has the riddle been written correctly or has it been passed on through a game of Chinese whispers?
The second sentence should start with "My friend and I..."

Have you had chance to consider my other answers - I have more than a dozen for which I haven't seen a response from you.

[boxtops]

I give up

[DTCwordfan]

A Penis

[ljdksa]

conjoined twin

[cupid04]

brain!

[guilliebrougues]

heart. if your heart stops beating both you and your heart dies.,

[guilliebrougues]

heart. if your heart stops beating it dies and so do you. the heart is the largest muscle in the body.

[society]

I read recently someone's heart stopped beating for over and hour and they were alive! I'll do a search to see if I could find the article.

[cupid04]

You're very kind!

[ljdksa]

I thought the "me and my friend" meant the answer was one of a pair? Not very well written.

[cupid04]

Have you seen the author, what do you expect?

[Old_Geezer]

An everlasting part of the body eh ? Wow there must be a load of those in the graveyards.

[ljdksa]

Perhaps it's bacteria then! Don't know if we'll ever find out

[ljdksa]

Oh yes, Cupid! Sorry...

[Sqad]

guilliebrougues

<<<<<< the heart is the largest muscle in the body.<<<<<

No it isn´t............Gluteus Maximus in the "backside" is the largest muscle.

[Mamyalynne]

Steak and Kidney, yum!

[Mamyalynne]

Ooops wrong thread I think.

[Old_Geezer]

No: sounds right to me :-)

[cupid04]

Well, I had steak over a week ago, I hope it's not still in my body!

[douglas9401]

Heart and soul.