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Biology Body Systems

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Group 3
Respiratory System * Consists of organs responsible for carrying oxygen from the air to the bloodstream and for expelling the waste product carbon dioxide. * Air passes from the nose or mouth via various respiratory passages, to millions of balloons like sacs, the alveoli in the lungs.
-term for the processes by which oxygen reaches body cells and is utilized by them in metabolism bywhich carbon dioxide is eliminated.
Parts of the Respiratory System * Nose-The uppermost part of the respiratory tract bearing the nostrils, the outer opening for entrance of air and the organ of smell.
Functions of the Nose: * Organ of Smell * Protecting the Lungs * It is also a resonator
Parts of the Nose: * Nasal Septum- is the central partition inside the nose that divides it into two cavities, the right and left passages called fossae. * Nasal Cavity- a sticky mucous membrane lines the nasal cavity and traps dust particles. * Nose Hairs- hairs at the entrance to the nose trap the large inhaled particles. * Internal Nares- posterior opening connected to the pharynx. * Facial Sinuses- these are air spaces in the bones of the skull which communicate with nasal cavities and make it lighter. * Sinusitis- the inflammation of the membrane lining the facial sinuses caused by infection. * Rhinoplasty- an operation that alters the structure of the nose to improve its appearance or to correct a deformity caused by injury or disease.

* Throat- Also known as “PHARYNX”. The passage running down from the back of the mouth and nose to the upper part of the esophagus and the opening into the larynx. Plays an essential part in breathing and eating and can change shape to help form vocal sounds on speech.

Parts of the Pharynx: * Nasopharynx- an air passage. The uppermost part, connect the...

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