The middle ear is an air-filled cavity in the temporal bone of the skull. The cavity is connected to the nasopharynx by the Eustachian tube; this tube permits equalization of the air pressure in the middle ear with the external atmospheric pressure. The middle ear contains three small bones or oscines: the hammer, the anvil, … Read more
The ear performs the task of converting the mechanical oscillations of a sound wave into electric nerve impulses. Thus, it is similar to a microphone, which also converts the mechanical oscillations of sound into electric signals. However, the ear is unmatched in its ability to accommodate a wide range of intensities of sound. The human … Read more
What is sound wave? A sound wave in air consists of alternating zones of low and high density. The vibrating diaphragm of a loudspeaker generates such zones of alternating density. The alternating zones of low density and high-density travel to the right away from the source. However, although these density disturbances travel, the air as … Read more
What is Work? To introduce the definition of work done by a force, we begin with the simple case of motion along a straight line, with the force along the line of motion, Consider a particle moving along a straight line, say, the x-axis, and suppose that a constant force F, directed along the same … Read more
A particular organ built up of material and fetal tissue forms a connection jointly is called the placenta.
The process in which green plants prepare carbohydrate food from CO2 and H2O by their chlorophyll pigments remaining in the chloroplast with the help of solar energy is known as photosynthesis. In this process, O2 is evolved as a by-product and the simplest sugar glucose is formed.
The scientific name of an animal is binomial which means it contains two parts. This naming is also referred to as binomial nomenclature.
What is classification? Depending on their characteristics, living organisms are grouped into different taxons. This step-wise grouping is known as classification.