What is the groove between the diapragm and ribcage in the lower part of the pleural cavity?

The groove between the diaphragm and the ribcage in the lower part of the pleural cavity is known as the costodiaphragmatic recess. It is found on either side of the chest and is formed by the curvature of the diaphragm and the lower edge of the ribcage.

To find this groove, you can perform a simple exercise:

1. Find a comfortable position where you can sit or stand with good posture.

2. Place your hands on your sides, just below your ribs. You should be able to feel the bony structure of your ribcage.

3. Take a deep breath and exhale slowly. As you exhale, you may feel a slight depression or groove forming between your ribcage and the lower part of your chest.

4. Gently move your fingers along this groove while continuing to exhale. You should be able to feel the contour of your diaphragm as it meets the ribcage.

By following these steps, you can locate and feel the costodiaphragmatic recess, which is the groove between the diaphragm and ribcage in the lower part of the pleural cavity.