GED Science Practice

What is lymph?

1. a thin coagulable fluid containing white blood cells

2. mammals with a pouch

3. native to or inhabiting the sea

4. mammals of which the females have a pouch

The correct answer is: a thin coagulable fluid containing white blood cells

Lymph is a thin, coagulable fluid that plays a crucial role in the immune system. It is primarily composed of water, proteins, and white blood cells, which are essential for the body's defense against infections and diseases. The presence of white blood cells enables lymph to transport immune cells throughout the body, facilitating immune responses. The other options refer to concepts that are unrelated to the biological definition of lymph. The terms relating to mammals with pouches refer to marsupials and describe a specific group of animals, while the option mentioning sea habitats does not pertain to bodily fluids or immune functions. Thus, the description of lymph as a fluid containing white blood cells accurately captures its primary characteristics and function in the human body.