In English grammar, an abstract noun is a noun or noun phrase that names an idea, event, quality, or conceptâfor example, courage, freedom, progress, love, patience, excellence, and friendship. An abstract noun names something that can't be physically touched. Contrast with concrete noun.
The adult human brain weighs on average about 1.2â1.4 kg (2.6â3.1 lb), or about 2% of total body weight, with a volume of around 1260 cm3 in men and 1130 cm3 in women, although there is substantial individual variation.
Here are some facts about your brain. Physical Attributes The weight of your brain is about 3 pounds. Your skin weighs twice as much as your brain. Your brain is made up of about 75 percent water.Your brain consists of about 100 billion neurons. There are anywhere from 1,000 to 10,000 synapses for each neuron. There are no pain receptors in your brain, so your brain can feel no pain. There are 100,000 miles of blood vessels in your brain.hysical Attributes The weight of your brain is about 3 pounds. Your skin weighs twice as much as your brain. Your brain is made up of about 75 percent water. Your brain consists of about 100 billion neurons.