- May 2, 2026The thoracic vertebral bodies increase in size from T1 to T12 as the load they bear increases progressively downward. They…
- May 2, 2026The sternum is a flat, dagger-shaped bone forming the anterior midline of the thorax, consisting of the manubrium, body, and…
- May 2, 2026The first rib is the broadest and shortest of all ribs, with a flat superior surface crossed by the subclavian…
- May 2, 2026Ribs 2 through 7 are true ribs that connect to the sternum directly via their own costal cartilages, forming the…
- May 2, 2026Ribs 8 through 10 are false ribs whose costal cartilages do not connect directly to the sternum but join the…
- May 2, 2026The eleventh and twelfth ribs are floating ribs with no anterior cartilaginous connection — they articulate only with the corresponding…
- May 2, 2026T1 is the first thoracic vertebra, transitional between the cervical and thoracic spine. Its body is larger than C7 and…
- May 2, 2026Vertebrae T2 through T8 are the mid-thoracic vertebrae that articulate with the corresponding ribs at their costal facets, contributing to…
- May 2, 2026The lower four thoracic vertebrae transition toward the lumbar region, with T9 through T12 articulating with the corresponding ribs —…
- May 2, 2026The interspinalis thoracis muscles are small, paired muscle slips connecting adjacent thoracic spinous processes. They are poorly developed in the…