Thoracic Vertebrae

Thoracic Vertebrae

Thoracic Vertebrae Definition The thoracic vertebrae are bones located between the cervical and lumbar vertebrae. There are 12 thoracic vertebrae in humans, and these bones increase in size as you move down the body.  They are thicker and larger than the cervical vertebrae but smaller than the lumbar vertebral bones. The increase in size ensures … Read more

Cleavage Furrow

Cleavage Furrow

Cleavage Furrow Definition A cleavage furrow is an indentation that appears in a cell’s surface when the cell is preparing to divide. It marks the beginning of the cell’s “pinching” its cell membrane and cytoplasm down the middle. Eventually, the cell will pinch itself completely in two, forming two daughter cells. This furrow is created … Read more