Questions: What is the difference between false and true ribs? How many of each are present in humans?

What is the difference between false and true ribs? How many of each are present in humans?
Transcript text: What is the difference between false and true ribs? How many of each are present in humans?
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Solution

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The difference between false and true ribs lies in their attachment to the sternum and their anatomical structure.

  1. True Ribs:

    • Definition: True ribs are directly attached to the sternum via their own costal cartilages.
    • Number: There are 7 pairs of true ribs in humans, making a total of 14 true ribs.
    • Attachment: Each of the first seven pairs of ribs (ribs 1-7) connects directly to the sternum.

  2. False Ribs:

    • Definition: False ribs are not directly attached to the sternum. Instead, their cartilages are connected to the cartilage of the rib above them or they do not connect to the sternum at all.
    • Number: There are 5 pairs of false ribs in humans, making a total of 10 false ribs.
    • Subcategories:
      • Vertebrochondral Ribs: Ribs 8, 9, and 10 are connected to the sternum indirectly through the cartilage of the rib above them.
      • Floating Ribs: Ribs 11 and 12 do not connect to the sternum at all and are also known as floating ribs.

Summary:

  • Humans have 7 pairs of true ribs (14 in total) that are directly attached to the sternum.
  • Humans have 5 pairs of false ribs (10 in total), which include 3 pairs of vertebrochondral ribs and 2 pairs of floating ribs.
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