Respiratory System

Respiratory System

consists of specific organs responsible for supplying the blood with oxygen and expelling carbon dioxide

Nose or nasal cavity

serves as the main entry / exit for air where it is warmed, filtered and humidified to get rid of foreign substances; it has two openings, the nostrils (or nares)

Pharynx or throat

a muscular tube found behind the mouth and nasal cavity which serves as the passageway for air and food

Larynx or voice box

it is formed by several cartilages whose function is to connect the pharynx and trachea and for the production of sound and speech

Epiglottis

a flap of tissue that acts as a protective barrier for the lungs

Trachea or Windpipe

made up of rings of cartilage making it flexible enough to keep the passageway open for air; Its cilia push mucus and dust particles and bacteria toward the throat

Bronchioles

tinier branches of the main bronchi going to the air sacs

Alveoli or air sacs

thin-walled bulbs referred to as the sites of respiration

Lungs

main organs of the respiratory system which are large, elastic, spongy sacs

Diaphragm

a dome-shaped muscle separating the chest from the abdomen that aids in respiration

Pharynx or throat

muscular tube found behind the mouth and nasal cavity which serves as the passageway for air and food.

Trachea or Windpipe

made up of rings of cartilage making it flexible enough to keep the passageway open for air; Its cilia push mucus and dust particles and bacteria toward the throat.

Epiglottis

tissue that acts as a protective barrier for the lungs.

Bronchi

two tubes that conducts air into the lungs: the left bronchus which is narrower, longer and less straight than the right bronchus.

Lungs

main organs of the respiratory system which are large, elastic, spongy sacs.

Bronchioles

tinier branches of the main bronchi going to the air sacs

Nose or nasal cavity

serves as the main entry / exit for air where it is warmed, filtered and humidified to get rid of foreign substances; it has two openings, the nostrils (or nares)

Alveoli or air sacs

thin-walled bulbs referred to as the sites of respiration

pleura

thin membrane covering the lungs

Cellular Respiration

process of using oxygen to break down sugar in food producing energy in cells and releasing carbon dioxide as a waste product.

External Respiration

exchange of oxygen and carbon dioxide between the air and the blood within the lungs.

Larynx or voice box

formed by several cartilages whose function is to connect the pharynx and trachea and for the production of sound and speech.

Diaphragm

dome-shaped muscle separating the chest from the abdomen that aids in respiration

Respiratory System

specific organs responsible for supplying the blood with oxygen and expelling carbon dioxide.

Pulmonary Ventilation or Breathing -

inhaling or taking in oxygen, and exhaling or releasing carbon dioxide out of the lungs

Medulla Oblongata

breathing center of the brain that regulates the breathing rate

Internal Respiration

exchange of oxygen and carbon dioxide between the blood and the body cells.