AEMCA Practice Exam

What describes edema?

1. Fluid accumulation in the bloodstream

2. Fluid in the interstitial space

3. Fluid retained in organs

4. Fluid concentrated in lymph nodes

The correct answer is: Fluid in the interstitial space

Edema is specifically defined as the accumulation of fluid in the interstitial space, which refers to the areas between cells in tissues. This phenomenon occurs when excess fluid leaks out of blood vessels into surrounding tissues, leading to swelling. Various factors can contribute to edema, including increased permeability of blood vessels, changes in hydrostatic pressure, and issues with lymphatic drainage. When considering other options, fluid accumulation in the bloodstream pertains more to a different condition and does not reflect the localized swelling associated with edema. While fluid retained in organs can occur in certain pathological conditions, it typically does not fit the classic definition of edema. Fluid concentrated in lymph nodes relates to the lymphatic system's response to infection or obstruction but is not synonymous with the generalized interstitial fluid buildup characteristic of edema. Thus, the description of edema aligns specifically with fluid accumulation in the interstitial space.