Answer: Pia mater. The pia mater (Latin: tender mother) is a very delicate membrane. It is the meningeal envelope that firmly adheres to the surface of the brain and spinal cord, following all of the brain's contours
Explanation:
<span>peristalsis is the involuntary, progressive, rhythmic contraction of the muscle in the wall if the esophagus propelling a ball of food down toward the stomach</span>
Energy produced by the various process of respiration stored in the form of ATP within the tissues
Symbiosis in lichens is the mutually helpful symbiotic relationship of greenalgae and/or blue-green algae(cyanobacteria) living among filaments of a fungus, forming lichen. The algaeor cyanobacteria benefit their fungalpartner by producing organic carbon compounds through photosynthesis