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Questions and Answers
What is the function of ribs in most tetrapods?
What is the function of ribs in most tetrapods?
- Surround the chest to enable lung expansion (correct)
- Connect to the thoracic vertebrae
- Facilitate digestion
- Support and protect the entire body
How many pairs of ribs do humans usually have?
How many pairs of ribs do humans usually have?
- 12 (correct)
- 24
- 18
- 6
What is the purpose of the first rib in humans?
What is the purpose of the first rib in humans?
- Protect the heart
- Facilitate lung expansion
- Support the spine
- Attached to thoracic vertebra 1 (T1) (correct)
What is a cervical rib?
What is a cervical rib?
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How are most ribs in the human body joined at the front?
How are most ribs in the human body joined at the front?
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Study Notes
Ribs in Tetrapods
- Ribs protect the heart, lungs, and other internal organs in most tetrapods
Human Ribs
- Humans usually have 12 pairs of ribs
- The first rib serves as an anchor point for muscles that move the scapula and support the shoulder joint
- A cervical rib is a rare congenital anomaly where an extra rib develops from a cervical vertebra
- Most ribs in the human body are joined at the front by the sternum, specifically through the costal cartilages
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