Which ventral cavity subdivision has no bony protection?
a. Thoracic cavity
b. Abdominal cavity
c. Pelvic cavity

Verified step by step guidance

1. Step 1: Understand the ventral body cavity and its subdivisions. The ventral cavity is divided into the thoracic cavity and the abdominopelvic cavity, which itself is subdivided into the abdominal and pelvic cavities.
2. Step 2: Recall the bony structures associated with each subdivision. The thoracic cavity is protected by the rib cage and sternum, providing strong bony protection.
3. Step 3: Consider the pelvic cavity, which is protected by the pelvic bones, offering substantial bony protection as well.
4. Step 4: Examine the abdominal cavity, which contains many vital organs but is primarily surrounded by muscle and connective tissue rather than bone, meaning it lacks direct bony protection.
5. Step 5: Conclude that the abdominal cavity is the ventral cavity subdivision without bony protection, as it is shielded mainly by muscles and soft tissues.

Key Concepts

Ventral Body Cavity

The ventral body cavity is a major body cavity located on the anterior side of the body, housing vital organs. It is subdivided into the thoracic cavity and the abdominopelvic cavity, which itself is divided into the abdominal and pelvic cavities.

Thoracic Cavity and Its Protection

The thoracic cavity contains the heart and lungs and is protected by the rib cage and sternum. This bony framework provides structural support and shields the organs from physical damage.

Abdominal Cavity and Lack of Bony Protection

The abdominal cavity contains digestive organs and lacks direct bony protection, being enclosed mainly by muscle and connective tissue. This makes it more vulnerable compared to the thoracic cavity, which is protected by ribs.