Your nose lets you smell and it's a big part of why you are able to taste things. The nose is also the main gate to the respiratory system, your body's system for breathing. Let's be nosy and find out some more about the nose. The nose has two holes called nostrils. 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. Closer to the tip of your nose, the septum is made of cartilage say: KAR-tel-ij , which is flexible material that's firmer than skin or muscle. It's not as hard as bone, and if you push on the tip of your nose, you can feel how wiggly it is. Behind your nose, in the middle of your face, is a space called the nasal cavity.
It connects with the back of the throat. The nasal cavity is separated from the inside of your mouth by the palate roof of your mouth. When you inhale air through your nostrils, the air enters the nasal passages and travels into your nasal cavity. The air then passes down the back of your throat into the trachea say: TRAY-kee-uh , or windpipe, on its way to the lungs. Your nose is also a two-way street. When you exhale the old air from your lungs, the nose is the main way for the air to leave your body.
Sinuses are spaces or small tunnels. Paranasal sinuses are small, air filled spaces within the bones of your face. They are above and behind your nose and behind your cheekbones. They give your voice its clarity and tone and lighten the weight of your skull. There are several pairs of sinuses and cancer can develop in any of them.
These sinuses fill with mucus and become blocked during infections like a cold. This causes the pressure and pain you feel around your nose and eyes when you have a cold sinus pain.
Like other parts of the body, the head and neck contains lymph nodes also called lymph glands. These small, bean shaped glands are part of the lymphatic system. Lymph nodes are often the first place cancer cells spread to when they break away from a tumour.
There are major groups of lymph nodes in the neck. Nasal and paranasal sinus cancers can spread to these nodes. You may need an operation to remove lymph nodes. The nostrils are the 2 openings in the nose. Structure of the paranasal sinuses. Diagram of the paranasal sinuses. Types of cells in the nasal cavity and paranasal sinuses. The mucous membrane has many types of cells, including: squamous cells, which make up most of the mucous membrane gland cells, which make mucus and other fluids nerve cells, which are responsible for the sense of smell in the nose immune cells, which help fight infection.
Other nearby structures. Other structures near the nasal cavity and paranasal sinuses include: lymph nodes in the neck called cervical lymph nodes nerves, which control swallowing, vision, smell, hearing and eye movement bones of the skull, such as the bones that make up the eye socket called the orbit , sphenoid bone, ethmoid bone and maxilla.
What the nasal cavity and paranasal sinuses do. The main functions of the nasal cavity and paranasal sinuses are to: filter, warm and moisten the air you breathe give you a sense of smell make mucus lighten the weight of the skull vibrate resonate , which helps to give your voice a unique sound protect the brain from injury. Human Anatomy. San Francisco: Pearson Benjamin Cummings; Cancer of the head and neck.
The nasal cavity and paranasal sinuses The space inside the nose is called the nasal cavity. This space warms, moistens and filters air as you breathe in. The bones around the nasal cavity have small hollow spaces in them called paranasal sinuses. These sinuses affect the sound and tone of your voice.
Cancer that starts inside the nose or paranasal sinuses is called nasal and sinus cancer. The salivary glands The salivary glands make saliva spit. The biggest pairs of salivary glands are: parotid glands, which are at the sides of the mouth, just in front of the ears submandibular glands, which are under each side of the jawbone sublingual glands, which are under the floor or the mouth and below each side of the tongue. The ears The middle ear is made up of the eardrum and a cavity called the tympanum.
The tympanum contains three small bones — the malleus, incus and stapes. These bones connect the eardrum to the inner ear. The tympanum is connected to the nasopharynx by a tube called the Eustachian tube. It is rare for cancer to develop in the middle ear.
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