Answer the following question given this paragraph: 

Some arthropods have special excretory structures. They are called coxal glands and Malpighian tubules . Coxal glands collect and concentrate liquid waste from blood. They excrete the waste from the body through a pore. Malphigian tubules carry waste from the digestive tract to the anus. The waste is excreted through the anus.


Q: Coxal glands collect liquid waste from what?

 Choices:

- lungs

- plasma

- heart

- blood

A:
blood
