Kylkiluissa

Kylkiluissa refers to the ribs, which are a series of curved bones in the chest cavity of vertebrates. Humans have typically 12 pairs of ribs, though variations can occur. These bones form the rib cage, a protective structure surrounding vital organs such as the heart and lungs. The rib cage also plays a crucial role in respiration, expanding and contracting with each breath.

The ribs are connected to the thoracic vertebrae in the back and, for the most part, to the sternum (breastbone) in the front via cartilage, forming joints. The upper seven pairs are known as true ribs, directly attaching to the sternum. The next three pairs are false ribs, attaching indirectly via the cartilage of the ribs above. The final two pairs are floating ribs, which do not attach to the sternum at all.

Injuries to the ribs, such as fractures, can be painful and may impair breathing. The ribs are also susceptible to conditions like costochondritis, an inflammation of the cartilage that connects the ribs to the sternum. The anatomy and function of kylkiluissa are fundamental to understanding the skeletal and respiratory systems.