WordGarden.iobreastbone
C2Pronunciation
UK
- /brˈɛstbəʊn/
US
- /brˈɛstboʊn/
Meanings
Noun
the flat bone at the front of the chest
Beyond the definition
Imagine your chest—right in the middle, running from just below your collarbone down toward your upper belly, lies the breastbone. Also known as the sternum, it's a long, flat bone that acts like a shield for vital organs like your heart and lungs. Think of it as the central pillar of your rib cage!
Historically, "breastbone" was literally understood to be the bone under the breasts (hence the name!). It's often referenced in anatomy lessons or when discussing injuries to the chest area. A fractured breastbone is a serious injury, usually caused by significant trauma like a car accident. You might hear doctors refer to it when describing heart surgery access points too – sometimes they need to temporarily separate the breastbone to operate.
The breastbone, scientifically known as the sternum, is a long, flat bone in the center of your chest. It forms the front wall of the rib cage and plays a crucial role in protecting the heart, lungs, and major blood vessels.
This isn't just any bone; it's made of three main parts: the manubrium (the top portion), the body (the middle section), and the xiphoid process (the bottom tip). Each part connects to surrounding ribs and cartilage, creating a strong framework for the chest.
It isn't only important for protection. It also serves as an attachment point for muscles involved in breathing and upper-body movement. Think about how your chest rises and falls when you inhale and exhale—the sternum moves with your ribs as they expand and contract.
Historically, the term "breastbone" was a more literal description of its location relative to the breasts. While anatomists now prefer "sternum," "breastbone" remains a common and understandable term, especially in non-medical contexts. You might encounter it in literature, historical accounts, or when discussing animal anatomy (birds have particularly prominent sternums for flight!). It's also frequently mentioned in medical dramas when describing chest injuries or surgeries. So next time you feel your heartbeat, remember the strong breastbone working hard to keep everything safe inside!
Examples
- 1
Medical exam
The doctor pressed gently on my breastbone to check for tenderness.
- 2
Heartburn symptom
She said the burning behind her breastbone got worse after meals.
- 3
CPR training
In CPR class, we learned where to place our hands on the breastbone.
See also
Forms and spellings
2 forms open this card.
Main spelling
- breastbonenoun
Forms
- breastbonespluralnoun