Term Exam 2: Chapter 7 Axial Skeleton Rib Cage

Question 1

What does the term Thorax refer to?

Answer 1

Thorax refers to the entire chest region

Question 2

What is the function of the rib cage?

Answer 2

The rib cage protects the heart, spleen and some visceral organs -Provide support for the upper limb -Plays a vital role in breathing

Question 3

What does the skeletal part of the thorax consist of? (4)

Answer 3

1. Sternum
2. Ribs
3. Costal Cartilages
4. Thoracic Vertebrae

Question 4

What is the sternum? Name and label the three parts of the sternum.

Answer 4

A flattened bone ~ 6 inches long

Three Parts:

1. Manubrium (top)
2. Body
3. Xiphoid Process (only process that does not articulate with the costal cartilages of ribs)

Question 5

How many pairs of ribs are there and what is the function?

Answer 5

12 pairs that provide structural support to the sides of the thoracic cavity

Question 6

What is important to note about ribs 1-7?

Answer 6

Ribs 1-7 have direct anterior attachment to the sternum

*True Ribs or Vertebrosternal Ribs*

Question 7

What kind of attachment do ribs 8-10 have?

Answer 7

Indirect attachment to the sternum

*False ribs or Vertebrochondral Ribs*

Question 8

What kind of attachment do ribs 11-12 have to the sternum?

Answer 8

Ribs 11 and 12 have no attachment to the sternum

*floating ribs

Question 9

Label the Ribcage

• Suprasternal notch
• sternum:
  
  • Manubrium
  • Body
  • Xiphoid Process
• Clavicle
• Clavicular Notch
• Scapula
• Sternal angle
• Ribs
• Costal Cartilage
• Intercostal Space

Answer 9

Question 10

Each rib has what 3 features?

Answer 10

1. Head
2. Neck
3. Body

Question 11

What does the Head of the rib contain?

What is the purpose?

Answer 11

The head contains a pair of articulate facets - superior and inferior, that form a vertebrocostal joint with a thoracic vertebra

Question 12

What are two characteristics of the Neck of the rib

Answer 12

1. Nonarticular tubercle - site of attachment for the lateral costotransverse ligament
2. Articular facet form a vertebrocostal joint with the facet on the vertebral transverse process

Question 13

What are four characteristics of the Body of the Rib?

Answer 13

1. Shaft
2. Main part of the rib
3. costal angle
4. costal groove

Question 14

What is the costal angle?

Answer 14

Point on rib where an abrupt change in curvature occurs

Question 15

What is the costal groove?

Answer 15

On body of rib - inner inferior surface that protects the intercostal blood vessels and nerves

Question 16

Label:

• Transverse process of vertebra
• Facet for tubercle of rib
• Body
• Intercostal space
• costal angle
• costal groove
• costal cartilage
• sternum
• spinous process of vertebra
• inferior facet
• superior facet

Answer 16

Question 17

Label:

• Head
• Superior Facet
• Costal groove
• Costal angle
• Body
• inferior facet
• articular facet
• Tubercle

Answer 17

Question 18

Label:

• spinous process
• facet for tubercle of rib x2
• tubercle of rib
• facet for transverse process
• transverse process
• superior demifacet
• vertebral body
• head of rib
• superior demifacet
• inferior facet of rib
• neck of rib

Answer 18