__________ and __________ pairs of ribs are called floating ribs.

The last two pairs of ribs are called floating ribs because

Ribs are attached to

Read the following statements (i) first seven pairs of ribs are called true ribs or vertebrochondral ribs. (ii) A rib has two articulation surfaces on its dorsal end and is hence called bicephalic. (iii) Pelvic girdle consists of two coxal bones (iv) Xiphoid process forms the lowermost and manubrium forms the uppermost part of the sternum. Which of these are correct?

Ribs attached to sternum are

During exhalation the ribs

Why does calcium float on water?

Indicate which pairs of angles are : Linear pairs.