Chpt 1 Thorax

Question 1

Where is thorax located

Answer 1

Part of body between neck and abdomen

Question 2

What is Thorax aka?

Answer 2

Chest

Question 3

Why is Chest more extensive than thorax?

Answer 3

Chest is superior part of the trunk,
broadest superiorly due to pectoral (shoulder)
girdle (clavicles and scapular)
girth consists of pectoral and scapular muscles and breasts in females

Question 4

What is shape of Thoracic cavity and its wall?

Answer 4

Truncated cone

Question 5

Where is Thoracic cavity and wall narrowest?

Answer 5

Narrowest superiorly and circumference increasing inferiorly

Question 6

Where is max circumference of Thoracic cavity and wall

Answer 6

At junction with abdomen portion of trunk

Question 7

How thin is wall of Thoracic cavity?

Answer 7

As thin as size of its skeleton

Question 8

What is shape of Thoracic skeleton?

Answer 8

Domed birdcage

Question 9

Describe floor of Thoracic cavity

Answer 9

Deeply invaginated inferiorly (pushed upward) by viscera of abdominal cavity

Question 10

What does Thoracic Skeleton form?

Answer 10

Osteocartilaginous thoracic cage

Question 11

What does thoracic skeleton protect?

Answer 11

Thoracic viscera and some abdominal organs

Question 12

What does thoracic skeleton include?

Answer 12

12 pairs ribs & associated costal cartilages, 12 thoracic vertebrae & intervertebral discs between and sternum

Question 13

Ribs aka

Answer 13

L. Costae

Question 14

Describe Ribs

Answer 14

Curved flat bones
Form most of thoracic cage
Light weight and resilient
Spongy interior contains bone marrow

Question 15

Bone marrow aka

Answer 15

Hematopoietic tissue forms blood cells

Question 16

Types of Ribs

Answer 16

Three types:-

1. True ribs
2. False ribs
3. Floating ribs

Question 17

Ribs genre

Answer 17

1) . Typical ribs

2) . Atypical ribs

Question 18

True Ribs aka

Answer 18

Vertebrosternal ribs
1st - 7th ribs
Attach directly to the sternum through their own costal cartilages