Small intestine. The small intestine is made up of the duodenum, jejunum, and ileum. Together with the esophagus, large intestine, and the stomach, it forms the gastrointestinal tract. In living humans, the small intestine alone measures about 6 to 7 meters long.After death, this length can increase by up to half.mall intestine. The small intestine is made up of the duodenum, jejunum, and ileum. Together with the esophagus, large intestine, and the stomach, it forms the gastrointestinal tract. In living humans, the small intestine alone measures about 6 to 7 meters long. After death, this length can increase by up to half.
Obsidian: Characteristics and Properties. Obsidian is the result of volcanic lava coming in contact with water. Often the lava pours into a lake or ocean and is cooled quickly. This process produces a glassy texture in the resulting rock.Iron and magnesium give the obsidian a dark green to black color.ften the lava pours into a lake or ocean and is cooled quickly. This process produces a glassy texture in the resulting rock. Iron and magnesium give the obsidian a dark green to black color.
Rondi: Everyone, meet Obsidian. He is an example of an igneous rock because he formed from melted rock, or magma. Obsidian is an extrusive rock, which means he is made from magma that erupted out of a volcano.Igneous rocks that form from magma underground and do not erupt are called intrusive..ondi: Everyone, meet Obsidian. He is an example of an igneous rock because he formed from melted rock, or magma. Obsidian is an extrusive rock, which means he is made from magma that erupted out of a volcano.