The document describes the structure and function of the human ear. It discusses the three main parts of the ear - the outer, middle, and inner ear. The outer ear collects sound waves and directs them through the external auditory meatus to the tympanic membrane. Vibrations then pass through the ossicles in the middle ear and oval window to reach the fluid-filled cochlea of the inner ear. Within the cochlea, vibrations stimulate hair cells which generate nerve impulses that travel to the brain for sound recognition and interpretation. The inner ear also contains structures like the semicircular canals that enable balance and spatial orientation.
Human ear, organ of hearing and equilibrium that detects and analyzes sound by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).
Human ear, organ of hearing and equilibrium that detects and analyzes sound by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).
The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body.
The outer ear
- pinna
- ear canal
- eardrum
2. The middle ear
- three ossicle bones;
(malleus, incus, stapes)
- two major muscles
(stapedial muscle, tensor
tympani)
- Eustachian tube
3. The inner ear
- cochlea (hearing)
- vestibular system (balance)
4. The central auditory system• PINNA: Important for sound
gathering and localization of
sound
• EAR CANAL or AUDITORY
MEATUS: important for
sound selection
• EARDRUM or TYMPANIC
MEMBRANE:
vibrates in response to
sound/pressure chan
The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear, the middle ear, and the inner ear. The outer ear consists of the pinna and the ear canal.
The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body.
The outer ear
- pinna
- ear canal
- eardrum
2. The middle ear
- three ossicle bones;
(malleus, incus, stapes)
- two major muscles
(stapedial muscle, tensor
tympani)
- Eustachian tube
3. The inner ear
- cochlea (hearing)
- vestibular system (balance)
4. The central auditory system• PINNA: Important for sound
gathering and localization of
sound
• EAR CANAL or AUDITORY
MEATUS: important for
sound selection
• EARDRUM or TYMPANIC
MEMBRANE:
vibrates in response to
sound/pressure chan
The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear, the middle ear, and the inner ear. The outer ear consists of the pinna and the ear canal.
Human ear, organ of hearing and equilibrium that detects and analyzes sound by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).
HEARING - MECHANISM, DYSFUNCTION AND TREATMENTANUGYA JAISWAL
THE DOCUMENT CONTAINS -
1.) BIOCHEMICAL AND MOLECULAR MECHANISM OF HEARING.
2.) ROLE OF VARIOUS ORGAN/SYSTEM INVOLVED IN ITS REGULATION.
3.) DYSFUNCTION OF EAR
4.) TREATMENT OF HEARING LOSS
THE POWER POINT PRESENTATION OF ANATOMY AND PHYSIOLOGY OF THE EAR (SENSE OF HEARING) IS JUST TO EQUIP READERS WITH SOME BASIC UNDERSTANDING ON THE ORGAN.
HOW IT OPERATES AND CONNECTED TO THE CENTRAL NERVOUS SYSTEM IN ORDER TO PERCEIVE SOUND AND AID IN BALANCE.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2. EAR
Serves as an organ having both hearing and equilibrium function.
Ear consists of 3 anatomical parts:-
1. External Ear- consists of :
a. Auricle (pinna)
b. External acoustic meatus
2. Middle Ear- consists of :
a. Three small auditory ossicles
b. Internal ear of tympanic membrane
3. . Internal Ear- consists of vestibulocochlear organ.
PINNA
The visible portion of the ear.
Help to collect the sound sources/waves.
Directs sound into the ear.
Made up of elastic fibrocartilage.
Each individual pinna create distinctive impact on the acoustic wave travelling
into the auditory canal.
EXTERNAL AUDITORY MEATUS
Conduct sound waves.
S- Shaped.
3cm in length.
It conveys the vibration of the sound to the tympanic membrane.
Small channel lined by skin and wax secreting glands.
3. THE MIDDLE EAR
Middle ear or Tympanic cavity is about 15 mm in anteroposterior and vertical
diameter.
Shape of a biconcave lens.
The lateral wall: Is largely occupied by the tympanic membrane .
It is small cavity in the temporal bone.
THE TYMPANIC MEMBRANE
Thin fibrous structure.
Circular & 1 cm in diameter.
Covered externally: By thin layer of stratified squamous epithelium
(consists of collagen fibers).
Lies obliquely at 55 degrees with the external acoustic meatus .
CONTENTS OF MIDDLE EAR CAVITY
1. Ossicles – malleus, incus, stapes.
2. Muscles – tensor tympani, stapedius .
3. 3 Vessels and nerves – chorda tympani and tympanic plexus of ear.
FUNCTIONS OF MIDDLE EAR CAVITY
Narrow, oblique, slit like, air containing cavity in the petrous part of
temporal bone.
Transmit the vibrations of the tympanic membrane to the perilymph of
the internal ear.
1. MALLEUS
a. The malleus is a hammer-shaped bone
b. Connected with the incus and is attached to the inner surface of the tympanic
membrane
c. It transmits the sound vibrations from the eardrum to the incus.
2. INCUS
a.The incus is the anvil-shaped small bone.
b. It connects the malleus to the stapes.
c. The incus transmits sound vibrations from the malleus to the stapes.
3. STAPES
4. a.The stapes is the stirrup-shaped small bone.
b. Attached to the incus laterally and to the fenestra ovalis, the "oval window", medially.
c. The oval window is adjacent to the vestibule of the inner ear.
d. The stapes is the smallest and lightest bone in the human body.
e. The stapes transmits the sound vibrations from the incus to the membrane of the inner ear
inside the fenestra ovalis.
INTERNAL EAR
The structures in the internal ear convey information to the brain about balance and
hearing.
Cochlear duct is the organ of hearing.
Semicircular ducts, utricle, and saccule are the organs of balance .
The nerve responsible for these functions is the vestibulocochlear nerve [VIII], which
divides into vestibular (balance) and cochlear (hearing) parts after entering the
internal acoustic meatus.
Cochlea – a tube shaped like a shell of a snail which consists of coiled, liquid-filled
tubes that are separated from one another by membranes. The lining of the
membranes is specialized hair cells that are sensitive to vibration. It contains the
actual organ of hearing called the organ of corti. That receives the sound waves and
transmits them to the brain.
semi-circular ducts – enable the body to maintain balance, consists of three
interconnected loop-shaped tubes at right angles to one another, these canals contain
fluid and hairlike projections that detect changes in body positions.
FUNCTION OF INTERNAL EAR
The internal ear converts the mechanical signals received from the middle ear,
which start as sound captured by the external ear, into electrical signals to transfer
information to the brain.
The internal ear also contains receptors that detect motion and position.
PHYSIOLOGY OF HEARING/MECHANISM OF HEARING
The external ear receives sound waves and directs them to the ear drum.
The ear drum vibrates in response to the sound waves and these vibrations
are transmitted through the ear ossicles (malleus, incus and stapes) to the oval
window.
The vibrations pass through the oval window on to the fluid of the cochlea,
where they generate waves in the lymphs.
The waves in the lymphs include a ripple in the basilar membrane.
These movements of the basilar movements bind the hair cells,passing
them against the tectorial membrane.
As a result, nerve impulses are generated in the aasociated afferent neurons.
These impulses are transmitted by the afferent fibres via auditory nerves to
the auditory cortex of the brain,
where the impulses are analyzed and the sound is recognized.
THE END