can someone tell me how flatworms remove waste??? Is it through their tubule? What's a tubule.. im so confused

Faltworms rely on difussion to transport oxygen and nutrients to their internal tissue and to get rid of carbon dioxide and other wastes from their body . Flateworms have no heart ,blood, blood vessels, grills , or other respiratory systems. Flatworms have flame cells. Flame cells are specialized cells that remove and purify excess water from the body.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

the answer is d p: cell, q: organ, r: organ system, s: tissue