Biology Circulation / Transport NUMS 2024
PMDC Verified Question 10 of 54
Which of the following would not be compromised in the absence of lymphatic system?
A
Blood pressure
B
Oxygen carrying capacity of blood
C
Blood composition
D
Defense mechanism
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Oxygen carrying capacity of blood
Concept:

The lymphatic system manages fluid homeostasis, lipid absorption, and immune defense, but has no role in respiratory gas transport.

Formula:

None

Solution:

  • If the lymphatic system disappeared, leaked plasma could not return to the veins, destroying blood volume and blood pressure.


  • Without lymph nodes, the adaptive defense mechanism would collapse.


  • However, the oxygen-carrying capacity of blood is determined entirely by the mass of Red Blood Cells and hemoglobin molecules locked safely within the cardiovascular system. Since RBCs do not leave the blood vessels to enter lymph, their oxygen-carrying capacity remains mechanically unaffected.


Why other options are incorrect:

  • Blood composition would alter as proteins and fluid leak into tissues without returning.

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