Question

The 8 th and 9 th ribs are known as false ribs
because their external portions are attached to
(a) xiphisternum
(b) costa of 7 th rib
(c) they have no costa
(d) they are not true ribs

Answer 1

Answer:

8th and 9th ribs are located in in the rib cage

mark me as brainliest!:)

Explanation:

Answer 2

Costa of the 7th rib

Explanation:

• In the sternal rib cage, ribs 1 through 7 which have their own cartilage are attached directly to the sternum, so are referred true ribs.
• The costal cartilages of the ribs 8 to 10 are only attached to the 7th rib and are called as the false ribs.
• Also called vertebrochondral ribs, they are cartilaginous and the elasticity of the false ribs helps expansion of the sternal cage to increase the intake capacity of the lungs during inhalation.