Uniqueness of Ribs and Costal Cartilages

Question 0

What is typical of a typical rib

Answer 0

Head- two facets and crest of head. One head articulates with the corresponding vertebrae other with superior
Neck-connects head with body at level of tubercle
Tubercle- Junction of head and body. Corresponds with transverse process of vetebra. Articular and non articular part

Question 1

What ribs are typical ribs?

Answer 1

3rd-9th

Question 2

What ribs are atypical?

Answer 2

Ribs 1, 2 and 10-12

Question 3

What is atypical about the 1st rib?

Answer 3

Broad, body is widest and its cross section more nearly horizontal. Shortest and most sharply curved of seven true ribs. Contributes more of a roof. Two shallow grooves separated by scalene tubercle. Articulates only with T1 vertebra

Question 4

What is atypical about the 2nd rib?

Answer 4

Thinner and more typical but has formations for attachments of serratus anterior and posterior scalene muscles.

Question 5

Atypical about ribs 10-12?

Answer 5

have only one facet on their heads

Question 6

Atypical about 11 and 12th ribs

Answer 6

short with no necks or tubercles