The document summarizes the development of the pharyngeal arches and pouches in humans. It discusses that the pharyngeal arches develop as thickenings in the foregut wall to support the primitive pharynx. Originally six arches form, though the fifth is small and disappears. Between the arches are endodermal pouches and ectodermal clefts. The structures that derive from each arch are described, including muscles, arteries, nerves and skeletal elements. The fate of the endodermal pouches is also outlined, many contributing to structures of the ear, throat and thyroid gland.
pharyngeal arches and pouches responsible for the development of head and neck including it's muscular development, neural development, vascular and skeletal development
pharyngeal arches and pouches responsible for the development of head and neck including it's muscular development, neural development, vascular and skeletal development
PHARYNGEAL APPARATUS BY JITENDRA GURJAR.pptx64Narendra
Human anatomy - Pharyngeal apparatus
A brief description of Pharyngeal apparatus and its components..
A brief research done by dr. Jitendra Gurjar and ppt made by dr. Narendra Gurjar
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
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.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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!
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
1. Development of Pharyngeal Arches & Pouches
Dr. Prabhakar Yadav
Associate Professor
Department of Human Anatomy
B.P. Koirala Institute of Health Sciences
2. After establishment of head fold,
foregut is bounded ventrally by
pericardium & dorsally by developing
brain.
Foregut is initially separated from
stomatodeum by buccopharyngeal
membrane, when it breaks down,
foregut opens to exterior.
Developing brain & pericardium are
seperated by stomatodeum -
………………………
3. Elongation of region between stomatodaeum &
pericardium forms- Neck.
Elongation is due to series of mesodermal
thickening in the wall of cranial most part of foregut
- pharyngeal / branchial arches - provide support to
lateral & ventral of wall of primitive pharynx.
4. •Before appearance of pharyngeal arches endoderma of foregut is separated form ectoderm by
mesoderm.
•Mesoderm form thickening in the form of six bars that runs dorsoventrally in the floor of developing
pharynx and fuse with corrosponding bar of opposite side to form pharyngeal arch.
•Initially there are six arches. The fifth arch is small and rudimentary, and soon disappears. Pharyngeal
arches are numbered craniocaudally as 1, 2, 3, 4, and 6.
5. Between two adjoining arches,
endoderm extend outward in the form
of –endodermal or branchial or
pharyngeal pouch.
Between two adjoining arches,
ectoderm invaginate inward in the
form of – ectodermal cleft.
Between two adjoining arches where
pharyngeal cleft and pouches are
opposed to each other forms-
Pharyngeal membrane
6. Structures formed in mesoderm of each arch
1. Skeletal element: Is cartilaginous, may remain
crtilaginous, may develop into bone or may
disappear
2. Striated Muscle: is supplied by nerve of the arch.
• Later muscle may or may not retain its
attachment to skeletal element of the arch.
• Muscle may subdivide to form number of distinct
muscles that may migrate away form pharyngeal
region but still carry their nerve with them.
7. Structures formed in mesoderm of each arch
3. Arteries of Pharyngeal Arches: Each pharyngeal
arch has its own artery that connects aortic sac
with the dorsal aorta.
8. Nerves of the Pharyngeal Arches:
Each arch is supplied by a nerve that Supplies-Skeletal Muscles
Its sensory branch supplies- overlying ectoderm &
endoderm(skin and mucous membrane).
•Morphologically each pharyngeal arch is supplied by 2 nerves.
Nerve that runs along cranial border of the arch- post-trematic
Nerve that runs along its caudal border is - pretrematic nerve.
In human beings, pretrematic nerves disappear from all arches
except first arch where it persists as chorda tympani nerve.
9.
10. Derivatives of skeletal elements:
Meckel’s cartilage: cartilage of 1st arch
• From dorsal end- Incus & malleus
•Ventral part- is surrounded by
developing mandible & is absorbed.
•Part extending from region of middle
ear to mandible disappears but its
perichondrium forms:
anteriror ligament of malleus &
sphenomandibular ligament.
Mesenchyme of the first arch is
responsible for formation of bones of
face including mandible, maxilla,
zygomatic , palatine & part of temporal
bone
11. Mandibulofacial dysostosis, Treacher collins
syndrome or first arch syndrome:
Entire first arch may remain underdeveloped on one
or both sides, affecting maxilla, mandible external
ear & lower eyelid ( coloboma type defect) , palate
• prominence of cheek is absent,
• ear may be displaced ventrally and caudally,
•presence of cleft palate, faulty dentition
12. Reichert’s cartilage : Cartilage of 2nd arch
Derivatives
• Stapes
•Styloid process
•Stylohyoid ligament
•Smaller ( lesser) cornu of hyoid bone
•Superior (upper) part of body of hyoid
bone
Cartilage of the third arch:
Derivatives
•Greater cournu of hyoid bone
•Lower part of body of hyoid bone
13. Cartilage of fourth & sixth arch:
Derivatives
cartilage of larynx viz., thyroid,
cricoid, arytenoid, corniculate, and cuneiform
except epiglottis, which develops from caudal part
of hypobranchial eminence
14. Muscles derived from pharyngeal arch
1st arch: Muscles of mastication
(temporalis, masseter, medial &lateral
pterygoids), mylohyoid, anterior belly of
digastric, tensor veli palatini & tensor
tympani
2nd arch: Muscles of facial expression
(buccinator, occipitofrontalis, platysma,
orbicularis oris, orbicularis oculi),
posterior belly of digastric
stylohyoid, stapedius & Auricular muscles
3rd arch: stylopharyngeus
4th & 6th arch: Muscle of larynx & pharynx
(Cricothyroid, levator palati,constrictors of
pharynx, and intrinsic muscles of the larynx)
15. Nerve of the arch & muscle supplied by them:
Arch Nerve of Arch Muscle of Arch
First arch mandibular
nerve
Muscles of mastication
(temporalis, masseter, medial
and lateral pterygoids), mylohyoid, anterior
belly of
digastric, tensor veli palatini,
and tensor tympani
Second arch Facial Muscles of facial expression
(buccinator,occipitofrontalis,
platysma,orbicularis oris, orbicularis oculi),
posterior belly of digastric
stylohyoid, stapedius & Auricular muscles
Third arch Glossophryngeal stylopharyngeus
Fourth and
sixth arches
Superior laryngeal
Recurrent laryngeal
Muscle of larynx & pharynx
(Cricothyroid, levator palati,
constrictors of pharynx, and
intrinsic muscles of the larynx)
16. Fate of endodermal pouches:
First pharyngeal pouch: elongates to form a
diverticulum called tubotympanic recess.
Distal part- of tubotympanic recess expands-
forms middle ear cavity & mastoid antrum.
proximal part- remains tubular-forms
pharyngotympanic/ (eustachian / auditory) tube,-
communication between nasopharynx and
tympanic cavity (middle ear).
17. Fate of endodermal pouches:
Second pharyngeal pouch: Epithelium of ventral
part of this pouch contribute to forms tonsil.
(Dorsal part take part in formation of tubotymanic
recess.)
Third pharyngeal pouch: give rise to inferior
parathyroid & thymus
Fourth pharngeal pouch: gives rise to superior
parathyroid gland & may contribute to thyroid
gland
Fifth or ultimobranchial pouch: gets incorporated
with fourth pouch, & forms caudal pharyngeal
complex.
Superior parathyroid gland & parafollicular cells
of thyroid arise from complex.
18. Pharyngeal Clefts (Grooves)
There are four pharyngeal clefts or grooves
First pharyngeal cleft gives rise to -epithelial lining
of external auditory meatus.
Pinna / auricle is formed by series of swellings
( hillocks) that arise on first & second arch
whereas
2, 3 & 4th cleft are obliterated.
19. Pharyngeal Clefts (Grooves)
Second arch grows faster than succeding arch &
comes to overhang them.
Space between overhanging second arch & the
third arch, fourth arch & sixth arch is called cervical
sinus.
Cavity of cervical sinus is lined by ectoderm-
normally gets oblitereted
20. Part of cervical sinus may persist & give rise to
swelling that lie in the neck along anterior border of
sternocleidomastoid – called branchial cyst .
When branchial cyst ruptures a branchial fistula is
formed- found on lateral aspect of neck along the
anterior border of sternocleidomastoid.