Lecture 20: Thoracic and Abdominal Walls Flashcards

1
Q

What does the thoracic cage consist of?

A

Vertebrae, ribs, and sternum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many pairs of ribs are there?

A

12 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which ribs are true ribs?

A

1-7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What defines true ribs as true?

A

They are attached to the sternum directly by costal cartilages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which are the false ribs?

A

8-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What defines a false rib?

A

Indirect or no attachment to the sternum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Rib pairs 11 and 12 are called what?

A

False floating ribs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the structure of a typical rib?

A

Head, neck, tubercle, body, costal groove, and angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What 3 parts make up the sternum?

A

The manubrium, body, xiphoid process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What rib does the manubrium articulate for?

A

rib 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What part of the sternum is the jugular notch associated with?

A

The manubrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does the body of the sternum articulate with?

A

Ribs 2-7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the muscles of the thorax?

A

The intercostals, transversus thoracis, intercostal space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The intercostal space contains what?

A

The intercostal vein, artery, and nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the muscles of the abdominal wall?

A

External oblique, internal oblique, transverse abdominus and rectus abdominis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What components make up the rectus abdominis

A

The linea alba and tendinous intersections

17
Q

What is the function of the costal groove?

A

Protects the intercostal nerve and blood vessels

18
Q

Describe the special structure of the 1st rib

A

Widest, shortest, and flattest

19
Q

Describe the special structure of ribs 10 11 and 12

A

They only have one facet on their head

20
Q

Describe the special structural component of ribs 11 and 12

A

They are short and have no tubercles

21
Q

What is a tubercle

A

A bump of the bone that occurs at the junction of the head and body and has one articular part and a non articular part

22
Q

What is the costal margin?

A

Formed by the costal cartilages of ribs 7-10 as they link to the sternum

23
Q

What is the subcostal angle?

A

It’s where the costal cartilages meet the sternum

24
Q

Where does the external oblique muscle originate from and insert onto?

A
  • Originates from the external surface of ribs 5-12
  • Inserts onto the linea alba and hip bones
25
What is the function of the external oblique muscle?
To compress and support the organs of the abdominal cavity and flex and rotate our trunk
26
What does the internal oblique originate from the extend to?
Originates from the top of the hip bone Inserts on the border of ribs 10-12
27
What is the function of the internal oblique
Compresses and supports organs of the abdominal cavity. Flexes and rotates our trunk
28
What does the transverse abdominis originate and insert onto?
Originats on the costal cartilages of ribs 7-12 and the iliac crest Inserts on the linea alba and inserts onto the anterior part of the pelvic bone
29
What is the function of the transverse abdominis?
Compresses and supports the abdominal organs
30
What is the function of the rectus abdominis?
When it contracts the trunk is flexed and the abdominal organs are compressed
31
Describe the structure of the thoracic diaphragm?
Dome shaped Separates thoracic and abdominal cavities Central tendon