Definition - What does Positive Displacement Pump mean? Positive Displacement Pump is a type of pump used to displace or force oil and petroleum products into pipelines or into various equipment installed in refineries.
A brain looks like a walnut because our minds are constantly making comparisons and finding similarities to help us understand the world around us. Here's an activity that can help you see more such things. Try to find faces.
Luckily, there are several brain foods that you can include in your daily diet to boost cognitive function, boost concentration, and slow down brain decline. Here are 7 foods to eat for better cognition, concentration, and for overall brain preservation. Interestingly enough, walnuts actually resemble small brains.