Jelito (also spelled jelita) is a Moravian and Czech non-smoked sausage, dark black-brown in color, made of minced head, fatback, and liver of pork mixed with blood, spices (garlic, black pepper, allspice, cumin, marjoram, and mace), salt, and peeled barley or unsweetened white bun.
Jelito from the Czech Republic
It should be noted that in Polish, the word jelito simply means "intestine." Sausages like the one here described in Poland are called kaszanka.