I believe lipids is what you are going for. A lipid is a macromolecule (monomer of fatty acids) that cushions organs, stores energy, and a version of it is solid at room temperature. The version of it that is solid at room temperature is called a saturated fat. Saturated fat may also be a correct answer.
Answer: system
Two or more organs working together form a system
Explanation:
A system is formed by two or more organs working together and performing similar function. For instance: organs such as the mouth, oesophagus, small intestine, pancreas, large intestine etc all joined to form the digestive system.
Thus, system is the answer
You should always, and I mean always, use a <u>coverslip</u> on your slide. Without it, the contents on it would slip off and there'd be a big mess.
For extra security:
<em>Always make sure your stage clips are working! :)</em>
<em></em>
I hope I helped! :)