Thorax

Question 1

Thoracic cage functions

Answer 1

Protection
Support
Respiratory movements

Question 2

Separates thorax from abdomen

Answer 2

Diaphragm

Question 3

Upper ribs = increase

Answer 3

Anterior-posterior diameter

Question 4

Lower ribs = increase

Answer 4

Transverse diameter

Question 5

Encloses heart, major vessels and nerves, trachea, oesophagus.

Answer 5

Mediastinum

Question 6

Consists of 2 pleural sacs which cover the lungs.

Answer 6

Pleural cavities

Question 7

Paired, segmental branches to the body wall

Answer 7

Intercostal arteries

Question 8

Paired arteries to paired internal organs

Answer 8

Bronchial arteries

Question 9

Ventral, unpaired arteries to the gastrointestinal tract

Answer 9

Oesophageal arteries

Question 10

The pleural cavity contains a thin film/fluid, why?

Answer 10

Helps the lungs the slide

Creates surface tension between the parietal and visceral layers to aid inspiration

Question 11

Medial aspect of lung next to the heart

Answer 11

The Hilum

Question 12

Atrioventricular valves:

Answer 12

Mitral

Tricuspid

Question 13

Semilunar valves:

Answer 13

Aortic

Pulmonary

Question 14

Left coronary artery function:

Answer 14

Supplies the thick muscles wall of the LV

Question 15

Right coronary arteries function

Answer 15

Supplies the conducting centres of the heart (SAN and AVN)

Question 16

Longitudinal contractile unit composed of sarcomeres arranged in series

Answer 16

Myofibrils

Question 17

Muscle contraction changes:

Answer 17

A band does not change
I band decreases
Thin filaments slide past thick filaments