The document summarizes ectodermal placodes and the epidermis. It discusses how placodes give rise to sensory structures like the eye lens, inner ear, and nose. It describes the different cranial placodes that form sensory tissues and nerves, including the anterior placodes that form the pituitary gland and eye lens. The intermediate placodes form nerves involved in sensation of the face and hearing/balance. The epidermis derives from surface ectoderm under the influence of BMPs and forms the protective outer layer of skin and its appendages like hair, sweat glands, and teeth.
This PowerPoint is one small part of the Taxonomy and Classification unit from www.sciencepowerpoint.com. A 3800+ slide Five Part PowerPoint presentation becomes the roadmap for an amazing and interactive science experience full of built-in lab activities, built-in quizzes, video links, class notes(red slides),review games, projects, unit notes, answer keys, and much more. Also included is a student version of the unit that is much like the teachers but missing the answer keys, quizzes, PowerPoint review games, hidden box challenges, owl, and surprises meant for the classroom. This is a great resource to distribute to your students and support professionals. The Classification and Taxonomy Unit covers topics associated with Taxonomy and Classification. The unit examines all of the Kingdoms of Life in detail. Areas of Focus within The Taxonomy and Classification Unit: -Taxonomy, Classification, Need for Taxonomy vs. Common Names, What is a Species?, Dichotomous Keys, What does Classification Use?, The Domains of Life, Kingdoms of Life,The 8 Taxonomic Ranks, Humans Taxonomic Classification, Kingdom Monera, Prokaryotic Cells, Types of Eubacteria, Bacteria Classification, Gram Staining,Bacterial Food Borne Illnesses, Penicillin and Antiseptic, Oral Hygiene and Plaque, Bacterial Reproduction (Binary Fission), Asexual Reproduction, Positives and Negatives of Bacteria, Protista, Plant-like Protists, Animal-like Protists, Fungi-like Protists, Animalia, Characteristics of Animalia, Animal Symmetry, Phylums of Animalia (Extensive), Classes of Chordata, Mammals, Subclasses of Mammals, Characteristics of Mammals, Fungi, Positives and Negatives of Fungi, Divisions of Fungi (Extensive), Parts of a Mushroom, 3 Roles of Fungi, Fungi Reproduction, Mold Prevention, Plant Divisions, Kingdom Plantae. If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy www.sciencepowerpoint@gmail.com
An oocyte is a female gametocyte or germ cell involved in reproduction.It is an immature ovum or an egg
An oocyte is produced in the ovary during female gametogenesis.The female germ cells produce a primordial germ cell pgc which undergoes mitosis to form an oogonium
During oogenesis the oogonium becomes a primary oocyte
Oogenesis consists of several sub processes – oocytogenesis, ootidogenesis and the maturation to form an ovum
Folliculogenesis is a separate sub process and supports all three oogenetic sub process
This PowerPoint is one small part of the Taxonomy and Classification unit from www.sciencepowerpoint.com. A 3800+ slide Five Part PowerPoint presentation becomes the roadmap for an amazing and interactive science experience full of built-in lab activities, built-in quizzes, video links, class notes(red slides),review games, projects, unit notes, answer keys, and much more. Also included is a student version of the unit that is much like the teachers but missing the answer keys, quizzes, PowerPoint review games, hidden box challenges, owl, and surprises meant for the classroom. This is a great resource to distribute to your students and support professionals. The Classification and Taxonomy Unit covers topics associated with Taxonomy and Classification. The unit examines all of the Kingdoms of Life in detail. Areas of Focus within The Taxonomy and Classification Unit: -Taxonomy, Classification, Need for Taxonomy vs. Common Names, What is a Species?, Dichotomous Keys, What does Classification Use?, The Domains of Life, Kingdoms of Life,The 8 Taxonomic Ranks, Humans Taxonomic Classification, Kingdom Monera, Prokaryotic Cells, Types of Eubacteria, Bacteria Classification, Gram Staining,Bacterial Food Borne Illnesses, Penicillin and Antiseptic, Oral Hygiene and Plaque, Bacterial Reproduction (Binary Fission), Asexual Reproduction, Positives and Negatives of Bacteria, Protista, Plant-like Protists, Animal-like Protists, Fungi-like Protists, Animalia, Characteristics of Animalia, Animal Symmetry, Phylums of Animalia (Extensive), Classes of Chordata, Mammals, Subclasses of Mammals, Characteristics of Mammals, Fungi, Positives and Negatives of Fungi, Divisions of Fungi (Extensive), Parts of a Mushroom, 3 Roles of Fungi, Fungi Reproduction, Mold Prevention, Plant Divisions, Kingdom Plantae. If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy www.sciencepowerpoint@gmail.com
An oocyte is a female gametocyte or germ cell involved in reproduction.It is an immature ovum or an egg
An oocyte is produced in the ovary during female gametogenesis.The female germ cells produce a primordial germ cell pgc which undergoes mitosis to form an oogonium
During oogenesis the oogonium becomes a primary oocyte
Oogenesis consists of several sub processes – oocytogenesis, ootidogenesis and the maturation to form an ovum
Folliculogenesis is a separate sub process and supports all three oogenetic sub process
Continuation of the cell structure and function. This presentation highlights the cell cycle and concentrate on how cell division occur and the steps involved in cell dividing.
2018/2019
Understanding Ectoderm Derivatives: Development, Functions, and Disorders
What are Ectoderm Derivatives?
Development of Ectoderm Derivatives
Functions of Ectoderm Derivatives
Disorders Associated with Ectodermal Dysplasia
Conclusion
Learn about ectoderm derivatives, their role in embryonic development, and their various functions in the human body. Discover the different disorders associated with ectodermal dysplasia and their impact on health.
The ectoderm is one of the three germ layers that forms during embryonic development. It gives rise to a variety of structures, including the skin, hair, nails, and nervous system. In this blog post, we will explore the different ectoderm derivatives, their development, functions, and disorders.
What are Ectoderm Derivatives?
Ectoderm derivatives are the structures that develop from the ectoderm layer during embryonic development. These structures can be broadly classified into two categories: surface ectoderm derivatives and neural crest derivatives.
Surface ectoderm derivatives include the epidermis, hair, nails, and glands of the skin. The epidermis is the outermost layer of the skin and provides a protective barrier against the external environment. Hair and nails are also derived from the surface ectoderm and serve various functions, such as insulation, protection, and sensory perception.
Neural crest derivatives, on the other hand, give rise to a variety of structures throughout the body. These include the peripheral nervous system, adrenal medulla, craniofacial cartilage and bone, and pigment cells. The peripheral nervous system consists of nerves and ganglia that extend from the brain and spinal cord to the rest of the body. The adrenal medulla is a part of the adrenal gland that produces hormones such as adrenaline. Craniofacial cartilage and bone form the structure of the face and skull, while pigment cells are responsible for skin and hair color.
Development of Ectoderm Derivatives
During embryonic development, the ectoderm layer undergoes a series of complex processes to give rise to the various ectoderm derivatives. The surface ectoderm is formed early on in embryonic development and begins to differentiate into the different structures that make up the skin and its appendages.
The neural crest, on the other hand, forms later in embryonic development and migrates throughout the body to give rise to various structures. The neural crest cells are highly multipotent, meaning they can differentiate into a variety of cell types depending on their location in the body.
Functions of Ectoderm Derivatives
Ectoderm derivatives play various roles in the human body. The skin, for example, serves as a protective barrier against the external environment and helps regulate body temperature. Hair and nails serve various functions, such as insulation, protection, and sensory perception.
The nervous system, which is derived from the neural crest, is responsible for transmitting s
Fate of embryonic layers and structures develope from themNizadSultana
Fate of embryonic layers and structures develope from it. Embryonic layers ectoderm mesoderm and endoderm form different structures during embryonic development.
Continuation of the cell structure and function. This presentation highlights the cell cycle and concentrate on how cell division occur and the steps involved in cell dividing.
2018/2019
Understanding Ectoderm Derivatives: Development, Functions, and Disorders
What are Ectoderm Derivatives?
Development of Ectoderm Derivatives
Functions of Ectoderm Derivatives
Disorders Associated with Ectodermal Dysplasia
Conclusion
Learn about ectoderm derivatives, their role in embryonic development, and their various functions in the human body. Discover the different disorders associated with ectodermal dysplasia and their impact on health.
The ectoderm is one of the three germ layers that forms during embryonic development. It gives rise to a variety of structures, including the skin, hair, nails, and nervous system. In this blog post, we will explore the different ectoderm derivatives, their development, functions, and disorders.
What are Ectoderm Derivatives?
Ectoderm derivatives are the structures that develop from the ectoderm layer during embryonic development. These structures can be broadly classified into two categories: surface ectoderm derivatives and neural crest derivatives.
Surface ectoderm derivatives include the epidermis, hair, nails, and glands of the skin. The epidermis is the outermost layer of the skin and provides a protective barrier against the external environment. Hair and nails are also derived from the surface ectoderm and serve various functions, such as insulation, protection, and sensory perception.
Neural crest derivatives, on the other hand, give rise to a variety of structures throughout the body. These include the peripheral nervous system, adrenal medulla, craniofacial cartilage and bone, and pigment cells. The peripheral nervous system consists of nerves and ganglia that extend from the brain and spinal cord to the rest of the body. The adrenal medulla is a part of the adrenal gland that produces hormones such as adrenaline. Craniofacial cartilage and bone form the structure of the face and skull, while pigment cells are responsible for skin and hair color.
Development of Ectoderm Derivatives
During embryonic development, the ectoderm layer undergoes a series of complex processes to give rise to the various ectoderm derivatives. The surface ectoderm is formed early on in embryonic development and begins to differentiate into the different structures that make up the skin and its appendages.
The neural crest, on the other hand, forms later in embryonic development and migrates throughout the body to give rise to various structures. The neural crest cells are highly multipotent, meaning they can differentiate into a variety of cell types depending on their location in the body.
Functions of Ectoderm Derivatives
Ectoderm derivatives play various roles in the human body. The skin, for example, serves as a protective barrier against the external environment and helps regulate body temperature. Hair and nails serve various functions, such as insulation, protection, and sensory perception.
The nervous system, which is derived from the neural crest, is responsible for transmitting s
Fate of embryonic layers and structures develope from themNizadSultana
Fate of embryonic layers and structures develope from it. Embryonic layers ectoderm mesoderm and endoderm form different structures during embryonic development.
Neurulation, Formation of Nervous System.pptxInshaPervaiz
Neurulation is the process by which the neural tube forms in the embryo. It is a critical stage in the development of the central nervous system (CNS), which includes the brain and spinal cord.
Here are the key points about neurulation:
1. *Neural plate formation*: The neural plate is a flat sheet of cells that forms from the ectoderm layer of the embryo.
2. *Folding and invagination*: The neural plate folds inwards to form a groove, which then deepens and closes to form a tube.
3. *Neural tube formation*: The neural tube is formed by the fusion of the neural folds.
4. *Closure of the neural tube*: The neural tube closes at both ends, forming the anterior (head) and posterior (spinal cord) neuropores.
5. *Brain and spinal cord development*: The neural tube differentiates into the brain and spinal cord.
Neurulation occurs around 3-4 weeks after fertilization and is a complex process that involves the coordination of multiple cellular and molecular mechanisms.
Abnormalities in neurulation can lead to neural tube defects (NTDs), such as spina bifida and anencephaly, which are birth defects that affect the CNS.
Here are some key terms related to neurulation:
- *Neural plate*: A flat sheet of cells that forms from the ectoderm layer of the embryo.
- *Neural fold*: A fold in the neural plate that forms during neurulation.
- *Neural groove*: A groove that forms in the neural plate during neurulation.
- *Neural tube*: A tube formed by the fusion of the neural folds.
- *Neuropore*: An opening at either end of the neural tube.
- *Neural crest*: A group of cells that form from the neural tube and migrate to other parts of the embryo to form various tissues.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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.
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.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
2. Placodes
All of our senses started out
as placodes- thickenings in
the surface ectoderm in the
cephalic region
After the neural ectoderm
moves inward to form the
CNS and PNS, the non-neural
ectoderm forms the
placodes.
Sensory placodes give rise to
among the following:
Lens of the eye
Part of the inner ear
Nasal organs
Olfactory epithelium
3. Cranial Placodes
• These are thickenings of the head and neck regions of the embryo
• They will eventually migrate away from the ectoderm and become sensory
tissue (except the lens and adenohypophyseal placode)
• A lot of this is from the Wht signaling which comes from the neural tube. This
will induce the ectoderm to differentiate into the different placodes.
5. Intermediate Cranial Placodes
• Trigeminal placode- this is subdivided into
• Ophthalmic placode
• Maxillomandibular placode
• These will become CNV (5th cranial nerve), which is a facial nerve and
also contribute to the nasal cavity
• Otic placode- sensory epithelium of the inner ear and the 8th cranial nerve
(coclear-vestibular). This is involved in hearing and balance
• Epibranchial placodes
• Geniculate- taste buds, tonsils
• Petrosal- tongue, carotid bodies
• Nodose- heart, lungs, GI tract
6. Cranial Placode Induction
• FGF will turn neural crest cells into pre-neural cells.
• If Anti-BMP and Anti Wnt is expressed, then they will become neural cells
• Otherwise, they become border cells
• If Anti-BMP and Anti-Wnt are expressed in the border cells at this point, they
become Pan-Placodal cells
• From this point, they can differentiate into other placodes
7. The Epidermis and Its Cutaneous Appendages
• The epidermis comes from ectodermal cells
• The surface ectoderm becomes the epidermis instead of neural tissue because
of BMPs (bone morphogenic proteins)
• BMPs promote epidermal specification and blocks the neural pathway
8. The Epidermis
• The basal layer of the epidermis contains the
stratum basale (germinavitium)
• This layer sits on the basal lamina
• This layer of cells are asymmetrical stem cells
• This layer will rise to upper layers of the skin
and become:
• More keratinized (waterproofed and
hardened)
• Flat (they go from a cuboidal shape to a
squamous shape)
• Dead
• The most superficial layer of the skin is the
stratum corneum
9. The Ectodermal
Appendages
• Examples of ectodermal
appendages are:
• Hair
• Teeth
• Sweat glands
• Mammary glands
• Forming these appendages
require interaction between
ectodermal epithelium and
mesenchyme.
• They form the epidermal placodes
