An 83-year-old resident of a skilled nursing facility presents to the emergency department with generalized edema of extremities and abdomen

I am presented with the following scenario: An 83-year-old resident of a skilled nursing facility presents to the emergency department with generalized edema of extremities and abdomen. History obtained from staff reveals the patient has a history of malabsorption syndrome and difficulty eating due to lack of dentures. The patient has been diagnosed with protein malnutrition.

Why is the patient presenting with the specific symptoms? What is the physiologic response to stimulus? Why did it occur? What cells are involved?

I was thinking it had to do with low albumin level, which decreases the plasma oncotic pressure, which allows fluid to move into the interstitial space, causing edema. I don’t really know what else I can add to this