The Mass Extinction Event at the End of the Cretaceous

question 29

Short Answer

The mass extinction event at the end of the Cretaceous period is thought to have been caused by the impact of a ________.

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Definitions:

Peritoneal Cavity

An abdominal space that lies between the parietal peritoneum (lining of the abdominal wall) and the visceral peritoneum (covering of the internal organs).

Renal Sinus

The renal sinus is a cavity within the kidney that is occupied by the renal pelvis, renal calyces, blood vessels, nerves, and fat.

Hilum

A part or structure in an organ where nerves and blood vessels enter or leave, commonly referenced in relation to the lungs or kidneys.

Cystitis

Inflammation of the bladder, often caused by a urinary tract infection, leading to symptoms like urgency and pain during urination.