erogenous zone, at each of the five stages of development: oral, anal, phallic, latency, and genital

he believed that each of us must pass through a series of stages during childhood, and that if we lack proper nurturance and parenting during a stage, we may become stuck, or fixated, in that stage

Umami was the fifth taste category to be discovered. Umami is a Japanese word that roughly translates to “yummy”, and it is associated with the savory taste found in foods like meat, cheese, and mushrooms (Kinnamon & Vandenbeuch, 2009).

This helps to explain why food loses its flavor when we have a blocked nose and cannot smell it.

Deafness is the partial or complete inability to hear. There are two main types of deafness. Conductive hearing loss is when sound fails to reach the cochlea. Causes for conductive hearing loss include blockage of the ear canal, a hole in the tympanic membrane, or problems with the ossicles. However, sensorineural hearing loss is the most common form of hearing loss. Sensorineural hearing loss occurs when neural signals from the cochlea fail to be transmitted to the brain, and can be caused by many factors, such as aging, head or acoustic trauma, infections and diseases

In other words, if a person has a deep voice, it is because they are producing a lot of low frequency sound waves, but high pitched voices contain sound waves of higher frequency.

The ear is designed to receive and transmit sound to the receptors deep inside it. It can be separated into three main sections.

When it is dark, the pupil dilate

You would have no choice but to notice it. Because this attentional capture was caused by the sound from the environment: it would be considered a bottom-up process.

n a clear night, the receptors in the back of the eye can detect a candle flame 1.6 miles away