Also called the hammer, it transmits sound vibrations to the incus, which passes them to the stapes. The stapes pushes in and out against a structure called the oval window. These cells translate vibrations into electrical impulses that are carried to the brain by sensory nerves.

Ear bone, also called Auditory Ossicle, any of the three tiny bones in the middle ear of all mammals. These are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup.

In mammal: Skeleton. The innermost bone is the stapes, or “stirrup bone.” It rests against the oval window of the inner ear. The stapes is homologous with the entire stapedial structure of reptiles, which in turn was derived from the hyomandibular arch of primitive vertebrates.

middle ear

The Etruscan shrew (Suncus etruscus), also known as the Etruscan Pygmy Shrew and the White-toothed Pygmy Shrew, weighs only 0.04–0.1 oz (1.2–2.7 g). That makes it the world’s smallest mammal when measured by weight, but, at 1.4–2 in (36–53 mm), it loses out to the bumblebee bat for smallest in length.

Experts believe that the naked eye — a normal eye with regular vision and unaided by any other tools — can see objects as small as about 0.1 millimeters. Until recently, standard microscopes would allow you to see things as small as one micrometer, which is equal to 0.001 mm.

Quarks

Explain that all matter on Earth exists in the form of a solid, liquid, or gas, and that solids, liquids, and gases are all made of extremely tiny particles called atoms and molecules.

Although phonons—the smallest units of the vibrational energy that makes up sound waves—are not matter, they can be considered particles the way photons are particles of light.

The smallest confirmed particle is the electron neutrino.

quark

Originally Answered: Is there anything smaller than a Planck length? There is no even theoretically possible measuring device that can measure differences between two locations that are closer together than a Planck length. Thus, the Planck length is the smallest possible unit of measurement.

The diameter of the proton is about as much as a millimetre divided by a thousand billion (10^-15m). Physicists can not yet compare what`s larger: a quark, Higgs boson or an electron. “So we can say that an electron is lighter than a quark, but we can not say that it is smaller than quark” – concludes Prof. Wrochna.

Quarks are fundamental particles and cannot be split.

The quarks are of special physical characters,it is confined within a small size,about 10^-16 cm,unseperateble from each others,but still it is possible to observe them when the resolution of the microscopes is highly improved.

A quark (/kwɔːrk, kwɑːrk/) is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. Up and down quarks have the lowest masses of all quarks.