The descending aorta is the continuum from the aorta to the division, the diameter is less than the first two segments, the descending aorta is divided into two small parts, the thoracic aorta and the abdominal aorta.
The pharynx is located behind the larynx, from the upper margin of the cervical cartilage to the lower margin of the ring cartilage, from the fourth to the lower margin of the sixth cervical vertebra, respectively.
The circulatory system works by continuous pressure from the heart and valves, which ensures that the veins carry blood to the heart and the arteries that carry it out.
The nose has an outer surface covered with skin, and an inner surface covered with the skin-mucosa is contiguous with the respiratory mucosa of the nasal cavities. Located in the thickness, between the two surfaces on his side
The lower limit line of the neck region, which separates the neck and thorax, is a line that begins at the apex of the crown of the 7th cervix, extending to the sides
The nose consists of the external nose and the nasal cavity. The external nose is the visible structure that forms a prominent feature of the face.
The orbit is a deep bony socket, containing the eyeballs, muscles, nerves, blood vessels, fat and most of the tears, with a pyramidal shape, foreground.
The endocrine gland can be a separate organ, it can also be clusters of cells concentrated in another organ, for example pancreatic islets in the pancreas or plaques in the testes.
The ear canal is shaped like a two-sided concave lens, narrow upper and lower, lying along the vertical plane but slightly inclined so that the outer wall looks outwards and downwards.
The paranasal sinuses are divided into four groups; the sinuses, frontal sinuses, sinuses, these sinuses are often infected with bacteria that spread from the nasal passages and cause sinusitis.
Organ system groups work together to create complete functions, there are 11 major organ systems in the body.
The heart has a dual pump that transports blood away from it and back, and newly oxidized blood leaves the heart's side through the aorta.
Women are born with a large number of oocytes, and until after the onset of puberty these cells are mature enough to sustain life.
In addition to air distribution and gas exchange, the respiratory system filters, warms and moistens the breathed air, and the respiratory system also plays a role in speech.
Engine movement occurs when nerve signals induce electrical changes in muscle cells, calcium is released into the cells and results in short muscle twitching.
The nervous systems process the collected information and then send instructions to the rest of the body, facilitating an appropriate response.
The lungs are surrounded by the sternum and thoracic bone on the front and the vertebrae on the back, which protects the lungs and other organs in the chest.
The brain is one of the most important body organs, so it's important to know how to recognize signs of potential problems.
As the air passes through the nose, specialized cells of the olfactory system, the brain recognize and identify odours, the hairs in the nose clear the air of foreign particles.
Sperm leaves the penis in a mixture of secretions to nourish and transport cells into the female reproductive system for reproduction.
The nasopharynx is surrounded by the sore throat and tonsils, which can become inflamed when infected, it contains adenoids, fights infection and opens the Eustachian tubes.
The kidneys are two pea-shaped organs in the urinary system that help the body get rid of waste products like urine, and it also helps to filter the blood before sending it back to the heart.
The connection between all of their digestive organs and their fluids requires a balance that can be easily broken, including diet, stress, illness.
When bronchitis becomes inflamed due to irritation or infection, resulting in more difficult breathing, people with bronchitis also tend to have more mucus and phlegm.
The spiny nerves are composed of two roots: the anterior root is the motor root, the posterior root is the sensory root, the sensory cell stem is located in the spiny ganglia