Because the vibrations are not very intense, but when it is blown upon by the breath, the air is pressed upon it, and the vibrations are thereby rendered more powerful.
Because it is pressed uponby the cold air which always rushes towards a rarer atmosphere.
Because the ear may be injured in various ways: the tympanum may be impaired, the fluid of the ear dried up, or the nerves be pressed upon by swellings in the surrounding parts.
The swelling is soft, and, if pressed upon, matter will escape from the nose if the head is depressed.
It emits a peculiar crackling sound when it is stroked or pressed upon.
If the cord is pressed upon, cut, or injured, messages can not be transmitted beyond that point, and so the posterior part becomes paralyzed.
In flat feet it is often necessary to concave the shoe as much as possible on the upper surface, so that the sole may not be pressed upon.
The fear of Great Britain ispressed upon us; at the same time her pacific disposition is enforced and insisted upon.
The large blood vessels and nerves in the vicinity may be pressed upon or stretched by the displaced bone, or may be implicated in fibrous adhesions.
This may occur at the time of the injury, the nerve being contused by the force causing the fracture, or pressed upon by one or other of the fragments, or its fibres may be partly or completely torn across.
For it appears by the Barometer, that every Inch Square upon the Surface of our Bodies is pressed upon by a Weight nearly equal to 1800 Drams, when the Mercury stands highest in the Barometer.
The vagus, the phrenic, and the spinal nerves may also be pressed upon.
When the Å“sophagus is pressed upon, the patient may have difficulty in swallowing.
It rarely causes symptoms, unless so situated as to be pressed upon by the boot.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "pressed upon" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.