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The human nose is the first organ of the respiratory system. It is also the principal organ in the olfactory system . The shape of the nose is determined by the nasal bones and the nasal cartilages , including the nasal septum , which separates the nostrils and divides the nasal cavity into two.
Human anatomy is the study of the shape and form of the human body. The human body has four limbs (two arms and two legs), a head and a neck , which connect to the torso . The body's shape is determined by a strong skeleton made of bone and cartilage , surrounded by fat ( adipose tissue ), muscle, connective tissue , organs, and other structures.
A nose is a protuberance in vertebrates that houses the nostrils, or nares, which receive and expel air for respiration alongside the mouth. Behind the nose are the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system.
Anatomy of the human head. The human head consists of a fleshy outer portion, which surrounds the bony skull. The brain is enclosed within the skull. There are 22 bones in the human head. The head rests on the neck, and the seven cervical vertebrae support it. The human head typically weighs between 2.3 and 5 kilograms (5.1 and 11.0 lb) Over 98 ...
The distinctive human nose shape, nostrils, and nasal septum; The cheeks, covering the maxilla and mandible (or jaw), the extremity of which is the chin; The mouth, with the upper lip divided by the philtrum, sometimes revealing the teeth; Facial appearance is vital for human recognition and communication. Facial muscles in humans allow ...
In the human skull, the facial skeleton consists of fourteen bones in the face: Inferior turbinal (2) Lacrimal bones (2) Mandible; Maxilla (2) Nasal bones (2) Palatine bones (2) Vomer; Zygomatic bones (2) Variations
The following outline is provided as an overview of and topical guide to human anatomy: Human anatomy – scientific study of the morphology of the adult human. It is subdivided into gross anatomy and microscopic anatomy. Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures ...
In a typical mammalian body such as the human body, the external body orifices are: The nostrils, for breathing and the associated sense of smell. The mouth, for eating, drinking, breathing, and vocalizations such as speech. The ear canals, for the sense of hearing. The nasolacrimal ducts, to carry tears from the lacrimal sac into the nasal cavity.
The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face and by their junction, form the bridge of the upper one third of the nose . Each has two surfaces and four borders.
Structure. The brow ridge is a nodule or crest of bone situated on the frontal bone of the skull. It forms the separation between the forehead portion itself (the squama frontalis) and the roof of the eye sockets (the pars orbitalis ). Normally, in humans, the ridges arch over each eye, offering mechanical protection.
