Question

complete the following statements:

1. the last two pairs of ribs that have no cartilaginous attachments to the sternum are sometimes called ______ ribs.
2. there are ______ pairs of true ribs.
3. costal cartilages are composed of ______ tissue.
4. the manubrium articulates with the ______ on its superior border.
5. list three general functions of the thoracic cage.

Explanation:

1. The last two - pair of non - sternum - attached ribs are floating ribs.
2. True ribs directly attach to the sternum and there are 7 pairs.
3. Costal cartilages are made of hyaline cartilage tissue.
4. The manubrium articulates with the clavicles on its superior border.
5. The thoracic cage protects organs, aids in respiration, and provides attachment for muscles.

Answer:

1. floating
2. 7
3. hyaline cartilage
4. clavicles
5. Protection of organs; Aid in respiration; Attachment for muscles