The head
Ribs and steaks come from cows.
http://ask.metafilter.com/27259/How-much-meat-is-there-on-a-cow
Steak comes from the loin area (which is located at the top of the back).
Not all cuts of beef are allowed, however, there are kosher steak cuts which come from the front half of the cow such as a rib steak.
Subscapularis. It is the muscle that lies directly beneath the scapula.
It is meat ariond the rib cage of the animal
The porterhouse steak comes from the point where the tenderloin and top loin meet; the top and middle area of the back of a cow.
cow
Cow
From the small end of the tenderloin (called the short loin) which is found on the back rib cage of the animal.
Pot roast is typically obtained from the shoulder area of the cow. Other tough cuts such as chuck steak and boneless chuck roast also come from this area.