Human Anatomy: Thoracic Region

Study Notes

Thoracic Region

Spans from the first thoracic vertebra to the diaphragm.
Anterior superior borders defined by the first rib and costae; posterior inferior border marked by the 12th vertebra.
Divided into thoracic cavity above the diaphragm and abdominal cavity below it.
Contains three smaller cavities:
- Two pleural cavities housing the lungs (right and left).
- One thoracic cavity housing the heart, esophagus, trachea, thymus gland, and arch of the aorta.
Blood vessels branch out to supply essential organs.

Abdominal Region

Extends from the diaphragm inferiorly to the pelvic area.
Lacks a membrane, hence referred to as the abdominal region.
Forms the abdominopelvic cavity, protecting critical visceral organs.

Clinical Division of the Abdomen into 4 Quadrants

Right Upper Quadrant: Contains right lobe of liver, right kidney, and hepatic flexure of colon.
Right Lower Quadrant: Houses the appendix.
Left Upper Quadrant: Comprises left kidney and left upper lobe of liver.
Left Lower Quadrant: No specific organs listed.

Description

Explore the anatomy of the thoracic region, which extends from the first thoracic vertebra to the diaphragm. This quiz covers the components of the thoracic cavities, including the lungs and heart, and their respective borders. Test your knowledge on the structures and functions within this critical area of the human body.