The ribs and also rib cage room excellent instances of the human being body’s multi-faceted and multi-functional design.

They are solid enough to support the skeleton and protect the critical organs in the chest cavity, consisting of the heart, lungs, and spleen. Yet, the ribs and also rib cage are additionally flexible sufficient to expand and also contract together the lungs fill and release with the breath.

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In this article, learn an ext about the variety of ribs humans have, what their function is, and also whether women have more than men.


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Most civilization are born with 12 ribs on each side of the body, make a total of 24 ribs.

Some human being are born with an ext than 24 ribs. This extra ribs are referred to as supernumerary ribs. When civilization are born with less than 24 ribs, the is called agenesis that the ribs.

To acquire an idea of just how many civilization had an unusual variety of ribs, researchers brought out a research on 188 pregnant women, who were each carrying a single fetus. The examine revealed the 92% of fetuses had actually a normal amount the ribs, 5.3% had fewer, and 2.7% had more.

The first seven set of ribs are dubbed true ribs. Costal cartilage anchors them come the edge of the sternum, or breastbone, in the middle of the chest at the front of the body. This ribs connect to the thoracic vertebra of the spinal shaft in the back.

Ribs 8–10 are known as false ribs. These do not affix to the sternum individually. Instead, costal cartilage anchors them come the ribs above them. They jointly share a cartilage link to the sternum through blending into the cartilage of rib 7. These ribs also connect to the thoracic vertebrae in the back.

Sets 11 and also 12 room floating ribs, and they only affix to the thoracic vertebrae of the spinal tower in the back.

It is the flexible costal cartilage that enables the ribs to expand when world take deep breaths.

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Extra ribs

Supernumerary ribs occur in around 0.5% that the population. Typically, they build on the last vertebra that the neck (the 7th cervical vertebra) over the normal first rib. Lock are dubbed cervical ribs, and they usually construct in pairs, back some people may only have actually one cervical rib.

Supernumerary ribs can also grow out of the lumbar spine listed below rib 12, however this only creates in about 1% the the population,

Much of the time, cervical ribs carry out not cause any type of symptoms. However, they have the right to press on and constrict nerves and blood vessels, i beg your pardon can develop a condition called thoracic outlet syndrome.