A collection of 22 bones, the skull protects the all-important brain and supports the other soft tissues of the head….Cranial Bones

In anatomy, a meatus (/miːˈeɪtəs/, mee-AY-təs), plural “meatus” or “meatuses”, is a natural body opening or canal. Meatus may refer to: the external acoustic meatus, the opening of the ear canal. The internal auditory meatus, a canal in the temporal bone of the skull.

Gross anatomy There are three main nasal meatuses: superior meatus. middle meatus. inferior meatus.

Meatus: An opening or a passageway. For example, the meatus of the ear is the opening to the ear canal.

The opening to the meatus is called the porus acusticus internus or internal acoustic opening. It is located inside the posterior cranial fossa of the skull, near the center of the posterior surface of the petrous part of the temporal bone.

• Frontal bone.
• Two parietal bones.
• Two temporal bones.
• Occipital bone.
• Ethmoid bone.
• Sphenoid bone.

In health, the middle meatus is an air-containing space between the middle turbinate and lateral nasal wall. The middle meatus is the most significant space in the nasal cavity when considering the drainage of the paranasal sinuses.

The conchae are structures made of bone inside of your nose. They help control the airflow into your nose. They also clean and warm air that you’ve inhaled so that it’s ready to go to your lungs for respiration.

The nostrils and the nasal passages are separated by a wall called the septum (say: SEP-tum). Deep inside your nose, close to your skull, your septum is made of very thin pieces of bone.

The inferior meatus, the largest of the three meatuses of the nose, is the space between the inferior concha and the floor of the nasal cavity. It extends almost the entire length of the lateral wall of the nose, is broader in front than behind, and presents anteriorly the lower orifice of the nasolacrimal canal.

The inferior meatus is below and lateral to the inferior nasal concha; the nasolacrimal duct opens into this meatus under cover of the anterior part of the inferior concha.

The are three conchae – inferior, middle and superior. They project into the nasal cavity, creating four pathways for the air to flow. Inferior meatus – between the inferior concha and floor of the nasal cavity. Middle meatus – between the inferior and middle concha.

The nasal septum is the key midline support structure of the nose and is composed of the quadrilateral cartilage, perpendicular plate of the ethmoid bone, and vomer bone (Figure 6-4).

Their inner supports are cartilage or ‘gristle’, which is lighter and more flexible than bone. This is why the nose and ears can be bent. After death, cartilage rots faster than bone. This is why the skulls of skeletons have no nose or ears.

The main function of the septum is to provide structural support for the nose and to help regulate and ensure smooth laminar airflow through the nasal cavities. The surface of the septum and the rest of the nasal cavity are covered by a lining called mucosa which secretes mucus and helps keep the nasal cavity moist.

The word “septum” is borrowed from the Latin “saeptum” meaning a “dividing wall or enclosure.”

Nose piercing pain level A septum piercing (the tissue between your nostrils) can hurt a lot for a short time but heals quickly because the septum is so thin. And if you have a deviated septum or similar condition, this kind of piercing can hurt even more because your septum nerves can be overactive .

Septum, heart: The septum of the heart is the dividing wall between the right and left sides of the heart. The word “septum” is borrowed from the Latin “saeptum” meaning a “dividing wall or enclosure.”

It is permissible because it comes under the heading of general adornment which includes rings, earrings, etc. it is proven that the women during the time of the Prophet ﷺ adorned themselves with these.

The atrioventricular septum is a septum of the heart between the right atrium (RA) and the left ventricle (LV). Although the name “atrioventricular septum” implies any septum between an atrium and a ventricle, in practice the divisions from RA to RV and from LA to LV are mediated by valves, not by septa.

The septum separates the atria and ventricles in such a way that it forms a barrier between the heart chambers and this prevents mixing of oxygenated and deoxygenated blood.

right side

The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. It usually beats from 60 to 100 times per minute, but can go much faster when necessary.

What is your heart? Your heart is about the size of your clenched fist. It lies in the front and middle of your chest, behind and slightly to the left of your breastbone. It is a muscle that pumps blood to all parts of your body to provide it with the oxygen and nutrients in needs to function.

septum

The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

left ventricle

The heart is made up of four chambers: two upper chambers known as the left atrium and right atrium and two lower chambers called the left and right ventricles. It is also made up of four valves: the tricuspid, pulmonary, mitral and aortic valves.

The base of the heart is located along the body’s midline with the apex pointing toward the left side. Because the heart points to the left, about 2/3 of the heart’s mass is found on the left side of the body and the other 1/3 is on the right.

The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated.

The four-chambered heart has a distinct advantage over simpler structures: It allows us to send our “dirty” blood to the cleaners-the lungs-and our “clean” blood to the rest of the body without having to mix the two. That system is very efficient.