Properties of lymph and tissue fluid

Steps:

• Statement 1: Lymph derives from tissue fluid, which filters from blood plasma, losing most proteins and all blood cells, confirming less protein and no blood cells.
• Statement 2: Lymph absorbs dietary lipids in intestines (as chyle), carries CO2 from tissues, and includes phagocytic white blood cells from blood.
• Statement 3: Tissue fluid forms by blood capillary filtration, retaining small solutes like glucose, amino acids, urea, and dissolved CO2 from metabolism.
• All statements align with physiological definitions, so 1, 2, and 3 are correct.

Why A is correct:

• Lymph and tissue fluid compositions are defined by capillary exchange principles, where proteins and cells are excluded from lymph, while solutes and gases diffuse freely.

Why the others are wrong:

• B excludes 3, but tissue fluid does contain metabolic solutes.
• C excludes 2, but lymph transports lipids, CO2, and immune cells.
• D excludes 1, but lymph indeed has reduced proteins and lacks blood cells.

Final answer: A