Anatomy of Canine Thorax

Question 1

Boundaries of thoracic cavity

Answer 1

Boundaries of thoracic cavity

Dorsal: thoracic vertebrae

Lateral: ribs and costal cartilages

Ventral: sternebrae and costal cartilages

Cranial: thorcic inlet

Caudal: diaphragm

Question 2

Lable

Answer 2

Question 3

Lable the openings

Answer 3

Question 4

Explain function of diaphragm

Answer 4

Diaphragm

• contrction flattens the muscle–increase volume—decrease pressure
• relaxation—decrease volume—increase pressure

*** significant role in respiration

Question 5

Serous cavities within thoracic cavity

Answer 5

Serous cavities within thoracic cavity

General naming based on location

• parietal serous membranes are on wall of cavity
• visceral serous membranes on surface of organs

*** visceral and parietal membranes can be continuous***

Specific naming within throacic cavity

• Left pleural cavity
• Right pleural cavity
• Pericardial cavity
  
  • is within mediastinum (between two pleaural cavitites and continuous with the cervical visceral space)