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Thoracic Wall and Respiration Mechanism Quiz

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Thoracic Wall and Respiration Mechanism Quiz

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Questions and Answers

Which structure forms the lower boundary of the thorax on each side?

Sternum

Costal margin (correct)

Diaphragm

Suprapleural membranes

Where is the subcostal angle situated?

Between the sternal attachments of the 2nd and 3rd costal cartilage

At the superior end of the sternum

Between the sternal attachments of the 7th and 8th costal cartilage (correct)

At the inferior end of the sternum

What forms the floor of the thorax?

Costal margin

Suprapleural membranes

Sternum

Diaphragm (correct)

What forms the roof of the thorax?

Suprapleural membranes Signup and view all the answers

Where is the first prominent thoracic spine felt?

At the lower end of nuchal furrow Signup and view all the answers

Where do the anterior intercostal arteries originate from?

Internal thoracic artery Signup and view all the answers

How many anterior intercostal arteries are there on each side of the body?

9 Signup and view all the answers

What do the anterior intercostal arteries supply?

Intercostal muscles and pectoral muscles Signup and view all the answers

Which artery is responsible for supplying the upper five or six anterior intercostal arteries?

Internal thoracic artery Signup and view all the answers

1

Supreme intercostal artery and thoracic aorta Signup and view all the answers

Study Notes

Boundaries of the Thorax

The lower boundary of the thorax on each side is formed by the costal margin.

Thoracic Angle

The subcostal angle is situated at the junction of the 7th and 8th ribs.

Floor and Roof of the Thorax

The floor of the thorax is formed by the diaphragm.
The roof of the thorax is formed by the thoracic inlet.

Thoracic Spine

The first prominent thoracic spine is felt at the 7th cervical vertebra.

Anterior Intercostal Arteries

The anterior intercostal arteries originate from the internal thoracic artery.
There are 9 anterior intercostal arteries on each side of the body.
The anterior intercostal arteries supply the anterior thoracic wall.
The internal thoracic artery is responsible for supplying the upper five or six anterior intercostal arteries.

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Description

Test your knowledge on the anatomy and function of the thoracic wall and the mechanism of respiration with this quiz. Explore the surface landmarks of the thorax and understand the importance of thoracic viscera in health and disease.