Podcast
Questions and Answers
What is the dorsal cavity?
What is the dorsal cavity?
- Protects the nervous system and is divided into two subdivisions. (correct)
- Contains the stomach and intestines.
- Houses the lungs.
- Separates the thoracic cavity from the abdominal cavity.
What does the cranial cavity encase?
What does the cranial cavity encase?
The brain
What does the vertebral cavity encase?
What does the vertebral cavity encase?
The spinal cord
What are the two subdivisions of the thoracic cavity?
What are the two subdivisions of the thoracic cavity?
What do the pleural cavities house?
What do the pleural cavities house?
What does the mediastinum contain?
What does the mediastinum contain?
What separates the abdominal cavity from the superior thoracic cavity?
What separates the abdominal cavity from the superior thoracic cavity?
What does the abdominal cavity contain?
What does the abdominal cavity contain?
Where is the pelvic cavity located?
Where is the pelvic cavity located?
What do serous membranes line?
What do serous membranes line?
What is the function of serous cavity?
What is the function of serous cavity?
What is parietal serosa?
What is parietal serosa?
What does visceral serosa cover?
What does visceral serosa cover?
What is the oral cavity commonly known as?
What is the oral cavity commonly known as?
Where is the nasal cavity located?
Where is the nasal cavity located?
What does the orbital cavity house?
What does the orbital cavity house?
What do the middle ear cavities contain?
What do the middle ear cavities contain?
What are synovial cavities?
What are synovial cavities?
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Study Notes
Dorsal Cavities
- Dorsal cavity protects the nervous system and comprises two subdivisions: cranial and vertebral cavities.
- Cranial cavity encases the brain and is located within the skull.
- Vertebral cavity runs through the vertebral column, encasing the spinal cord.
Thoracic Cavity
- Thoracic cavity is divided into pleural cavities and mediastinum.
- Pleural cavities house each lung, providing a protective space.
- Mediastinum contains the pericardial cavity and surrounds other thoracic organs.
Abdominopelvic Cavity
- Abdominopelvic cavity is separated from the thoracic cavity by the diaphragm and has two subdivisions: abdominal and pelvic cavities.
- Abdominal cavity contains major digestive organs, including the stomach, intestines, spleen, liver, and kidneys.
- Pelvic cavity resides within the pelvis and contains the bladder, reproductive organs, and rectum.
Serous Membranes
- Serous membranes (serosa) line internal cavities and are moist and slippery, helping to reduce friction.
- Key types include pleura (lungs), pericardium (heart), and peritoneum (covers visceral organs in the abdominal cavity).
- Serous cavity is the slit-like space between the serous membranes.
Serosal Layers
- Parietal serosa refers to the outer wall of the cavity.
- Visceral serosa covers the organs such as the heart, lungs, intestines, and kidneys.
Additional Cavities
- Oral cavity refers to the mouth area.
- Nasal cavity is situated posterior to the nose.
- Orbital cavity houses the eyes.
- Middle ear cavity contains ossicles, which transmit sound vibrations.
- Synovial cavities are found in joints, facilitating movement.
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