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Occipital bone

The occipital bone    is the single bone that forms the posterior skull and posterior base of the cranial cavity ( [link] ; see also [link] ). On the base of the skull, the occipital bone contains the large opening of the foramen magnum    , which allows for passage of the spinal cord as it exits the skull. On either side of the foramen magnum is an oval-shaped occipital condyle    . These condyles form joints with the first cervical vertebra and thus support the skull on top of the vertebral column.

Posterior view of skull

This figure shows the posterior view of the skull and the major parts are labeled.
This view of the posterior skull shows attachment sites for muscles and joints that support the skull.

Sphenoid bone

The sphenoid bone    is a single, complex bone of the central skull . It serves as a “keystone” bone, because it joins with almost every other bone of the skull. The sphenoid forms much of the base of the central skull and also extends to the temple area at the sides of the skull . Inside the cranial cavity, the bone with right and left wings which resemble the wings of a flying bird. The sella turcica    (“Turkish saddle”) is located at the midline of the sphenoid bone.

Sphenoid bone

This image shows the location and structure of the sphenoid bone. A small image of the skull on the top left shows the sphenoid bone highlighted in ochre yellow. The top panel shows the superior view of the sphenoid bone and the bottom panel shows the posterior view of the sphenoid bone.
Shown in isolation in (a) superior and (b) posterior views, the sphenoid bone is a single midline bone that forms the anterior walls and floor of the middle cranial fossa. It has a pair of lesser wings and a pair of greater wings. The sella turcica surrounds the hypophyseal fossa. Projecting downward are the medial and lateral pterygoid plates. The sphenoid has multiple openings for the passage of nerves and blood vessels, including the optic canal, superior orbital fissure, foramen rotundum, foramen ovale, and foramen spinosum.

Ethmoid bone

The ethmoid bone    is a single, midline bone that forms the roof and lateral walls of the upper nasal cavity, the upper portion of the nasal septum, and contributes to the medial wall of the orbit ( [link] and [link] ). On the interior of the skull, the ethmoid also forms a portion of the floor of the anterior cranial cavity (see [link] b ).

Sagittal section of skull

This diagram shows the sagittal section of the skull and identifies the major bones and cavities.
This midline view of the sagittally sectioned skull shows the nasal septum.

Ethmoid bone

This image shows the location and structure of the ethmoid bone. A small image of the skull on the top left shows the ethmoid bone colored in pink. A magnified image shows the inferior view of the ethmoid bone.
The unpaired ethmoid bone is located at the midline within the central skull. It has an upward projection, the crista galli, and a downward projection, the perpendicular plate, which forms the upper nasal septum. The cribriform plates form both the roof of the nasal cavity and a portion of the anterior cranial fossa floor. The lateral sides of the ethmoid bone form the lateral walls of the upper nasal cavity, part of the medial orbit wall, and give rise to the superior and middle nasal conchae. The ethmoid bone also contains the ethmoid air cells.

Lateral wall of nasal cavity

This figure shows the structure of the nasal cavity. A lateral view of the human skull is shown on the top left with the nasal cavity highlighted in purple. A magnified view of the nasal cavity shows the various bones present and their location.
The three nasal conchae are curved bones that project from the lateral walls of the nasal cavity. The superior nasal concha and middle nasal concha are parts of the ethmoid bone. The inferior nasal concha is an independent bone of the skull.

Sutures of the skull

A suture    is an immobile joint between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the bones of the brain case are not straight, but instead follow irregular, tightly twisting paths. These twisting lines serve to tightly interlock the adjacent bones, thus adding strength to the skull for brain protection.

Questions & Answers

high Dublin divino through Higginbotham
Shubham Reply
1.it allows producers to learn and invent 2.it allows agent to take advantage of economic scale 3.it allow agents to focus in areas of
oyebola Reply
can someone explain the motive of money to me?
Alemogho Reply
ask the question you don't know
opportunity cost
the motive of money is to pay for goods or services. it's also for transaction purposes bet it ordinary or unforseen
Money helps to reduce our scarcity problems. It can satisfy your wants to an extent
How dose economics use science methods to explains it problems
Edmond Reply
according to Jhon Robinson the main problem of economics is what to produce? how to produce? whom to produce? economics tries to solve these problem scientifically by using its theories which are scientific in nature,basically micro and macro theories which just explain what the problem is...
and now the solving techinique is also changed. only theories or its matematical +statistical version is not sufficient so the economist had developed Econometrics which includes economic theory+mathematical economics+statistics, for solving economic problem. This method treats economics as a pure
..pure science so this technique is based on pure scientific methods.
Economics is the scientific study of human behavior so there for science is used to solve economics problems using economics theories
economic is not higly subject of taminadu ...
measurement of elasticity of demand
John Reply
Price elasticity of demand= Percentage change in quantity demanded/ Percentage change in price
For example, suppose that a 10 percent increase in the price of an ice-cream cone causes the amount of ice cream you buy to fall by 20 percent. We calculate your elasticity of demand as
Price elasticity of demand =20 percent /10 percent = 2
In this example, the elasticity is 2, reflecting that the change in the quantity demanded is proportionately twice as large as the change in the price.
what is economic
Samuel Reply
economics is a social science that studies the relationship of human behavior between ends and scare...
Why is economics as a subject is so important to human being?
it's significant in study of managing available resources to satisfy human needs and wants
economics is the science of wealth
it is also said that it is the science of scarcity
why study economic
Economic helps to meet our needs and wants nd to make choices.
careers or jobs associated with economics
Economics is more than choices, scarcity, resources etc. It has a lot to do with psychology, social psychology. Understand motivation for consumer decisons.
How does commercial banks create credit
Penda Reply
what is equilibrium price?
Stella Reply
happen when demand curve and supply curve meet
intersection point of demand and supply curve
the equilibrium price is that price at which the quantity demanded is equal to the quantity supplied... i.e the price at which what people want to buy is equal to what the sellers want to sell.
what is difference between demand and quantity demand
the price which is prevailing in the market ,it is the price at which the consumer is getting maximum satisfaction and the producer is getting maximum profit.
at equilibrium price demand for commodity is equal to supply of commodity..
dear sareel, quantity demand means the quantity of commodity which is demanded at a particular price e,g , your demand is for 4 oranges when price of orange is 5,, on the other hand demand means the whole quantity price relationship, quantity demand is shown on a particular point on demand curve,
sarjeel sbb, reply please...
what is elasticity of demand
what is Economics?
Economics can be defined as a social sciences that study human behavior as a relationship between end and scarce mean which have alternative use
What is taxation
economics is the study of scarcity
dear Suleiman how?
economics is a subject matter that studies different economic activities as directed towards maximization of income at level of individual and maximization of social welfare at the level of society as a whole
economics studies us how to allocate scarce resources to full fill the maximum human wants as the resources have alternative uses..and r very scare to fullfill the human wants as the wants of humans are unlimited
demand is what a buyer is able and willing to buy at a specific price where by quantity demanded is amount of demand the buyer is able and willing to buy at a specific price.
thanks che..
how does commercial banks create credit
write models of Aggregate Supply?
abdi Reply
models of aggregate supply?
Then what's the law of elasticity?
wat happen if money circulation failed to be controlled in any county?
Enockz Reply
the amount of money in circulation increases and cause aggregate demand to rise. Thus, hyperinflation.
what's heteroscandacity
price mechanism refers to the manner which price of goods and services affect the demand and supply of goods and services
heteroscandacity: Is the circumstance where there is unequal variances across the observations.
what is price mechanisms?
Che Reply
price mechanism refers to the manner which price of goods and services affect the demand and supply of goods and services
what is demand
kabeer Reply
desire and ability to pay for a commodity is called demand.
i desire to become Prime Minister of India , is it demand ?please answer---
demand refers to the quantity demanded of a commodity that consumers are willing and able to buy at a particular price over a given period of time
or the willingness power of a commoditythat is backed up by the ability to pay
u r 100% right..
is ability to purchase a perticular goods at any price at a given time.
tanz Rather
ur desire to become a prime minister of lndia is nt demand because u have nt made any efforts or willingness, it is called mere wish or lets say mere desire
Thank you so much dear Abigail Mante for giving answer to my question..
U are welcome
it's ok,dear..
The term ceteris paribus implies that
Demand is the quantity demanded of a commodity at which a consumer is willing and able to purchase at various prices over a given period of time.
ceteris parbus explains the law of demand,which states that at a higher price quantity demanded of a commodity is low and at a lower price quantity demanded of a commodity is high all other things being equal.
U know right girl
ceteris paribus is an economics terms used in situations where we considered other factors to remain unchanged
Thanks for the answer
please how does disposable income affect demand?
hell. somebody must tell me what is the meaning if cetrasparibus
plz. guys
the quantity of a commodity that a consumer ready willing and able to purchase at a particular price and in a particular period of time is known as demand
ceterusparibus means constant i,e,(other things do not change or other things remains constant)
right answer yawer saab
things like what@Rather
bilal sheikh why u has been written what
e,g demand is determined by various factors like price of commodity, uses of good, expected changes in near future, nature of commodity , but when we learn price elasticity of demand , we keep other determinants of demand constant(i,e , we do not expect any change in price of good in near future,etc
i think u understand the term ceterus paribus..
bcz I can not understand
ok bro
wht is other factors
income of consumer, taste,
Gold. Medlist in economics and. Lecturer of economics
hello..what's are the factors affecting cross elasticity of demand.? at least five factors
The time it takes to get a product to market. That time limit has a name call "Just in Time."
thanks guys
hey guys what is inelastic demand
when there is no change in quantity demanded due to change in price then elasticity of demand is inelastic
Hi sucker how are you...
thanks for the answer
Any question about economics
yes. what is the main cause of Heteroscedasticity
waht is elasticity of demand
elasticity of demand means change in quantity demanded divided by change in any of its determinent ,e,g , price ed= % change in quantity demanded/ % change in price.
elasticity of demand is the degree of responsiveness of quantity demanded of a commodity to a change in price of the commodity in question ,price of other related commodity n the consumers income
guys what is monopoly
A single seller in the market.
what are the importance of economics
Eric Reply
what causes the demand curve to shift.
other factors except price.it include test of a consumer fashen presence of substitute advatisment
factors other than price
Its helps to determine the price
state three factors that affect demand and supply
1,price of the product 2,expectations in near future 3,uses of product
1.advertisement 2. expectation of future change in price 3.consumers income
1.alternative products on market. 2.changes on price 3.consumer's expectations
what is cheque
adedayo Reply
resources of exchanging of money to any where
it is a writen order to a bank to pay a specific sum of money to a person
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
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Source:  OpenStax, Skeletal system. OpenStax CNX. Apr 17, 2015 Download for free at https://legacy.cnx.org/content/col11779/1.1
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