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CAR > The thoracic cavity > Flashcards

The thoracic cavity Flashcards

1
Q

How many pairs of ribs do dogs have?

A

13

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2
Q

How many pairs of ribs do cats have?

A

13

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3
Q

How many pairs of ribs do rabbits have?

A

12

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4
Q

How many pairs of ribs do ferrets have?

A

15

Sometimes 14

Sometimes different numbers on each side

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5
Q

How many pairs of ribs do cows have?

A

13

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6
Q

How many pairs of ribs do sheep have?

A

13

Occasionally 14

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7
Q

How many pairs of ribs do pigs have?

A

14-15

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8
Q

How many pairs of ribs do horses have?

A

18

17 in Arabian horses

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9
Q

How many pairs of ribs do humans have?

A

12

Sometimes 13 or 11

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10
Q

Which muscles between the ribs are involved in inspiratory action?

A
  • External intercostal muscles
  • Interchondral component of the internal intercostal muscles
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11
Q

What are the two components of the internal intercostal muscles?

A
  • Interosseous - expiratory component
  • Interchondral - inspiratory component
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12
Q

Explain which component of the intercostal muscles allows forced expiration and how.

A
  • Interosseous component of the internal intercostal muscles
  • Enable forced expiration by depressing the ribs and reducing the volume of the thoracic cavity
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13
Q

Describe the innervation of the diaphragm

A
  • Diaphragm = striated musculature
  • Motor and sensory innervation by the phrenic nerve
  • This originates from C3-C5 spinal nerves in the neck
  • This provides exclusive motor control of the diaphragm (which is the primary muscle of respiration)
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14
Q

Which structures does the diaphragm contain openings for?

A
  • Oesophagus
  • Caudal vena cava
  • Aorta
  • Thoracic duct
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15
Q

Equine: structures within the mediastinum

1

A

Axillary vessels

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16
Q

Equine: structures within the mediastinum

2

A

Sixth rib

17
Q

Equine: structures within the mediastinum

3

A

Diaphragm

18
Q

Equine: structures within the mediastinum

4

A

Left auricle

19
Q

Equine: structures within the mediastinum

5

A

Left ventricle

20
Q

Equine: structures within the mediastinum

6

A

Pulmonary trunk

21
Q

Equine: structures within the mediastinum

7

A

Vagus nerve

22
Q

Equine: structures within the mediastinum

8

A

Phrenic nerve

23
Q

Equine: structures within the mediastinum

9

A

Thoracic duct

24
Q

Equine: structures within the mediastinum

10

A

Tracheobronchial lymph nodes

25
Q

Equine: structures within the mediastinum

7’

A

Dorsal and ventral vagal trunks

CAR (17 decks)

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