Organs of the Respiratory System Nose Pharynx Larynx
- Slides: 52
Organs of the Respiratory System • • • Nose Pharynx Larynx Trachea Bronchi Lungs
Accessory Structures • Thorax • Diaphragm
The Nose
The nose (naso or rhino) acts as entrance for air and exit for carbon dioxide. A ciliated epithilial mucus membrane lines the nose and much of the respiratory tract. It serves as a filter for dust and other foreign material. It warms and moistens entering air and has olfactory receptors
The nostrils (nares) are paired openings. The nostrils vary in pliability and expandability. The horse has pliable and expandable nostrils because mouth breathing is not characteristic. The expandability accommodates the increased need for oxygen
The Pharynx This is a musculomembranous saclike structure. The upper portion is attached to the base of the skull and the lower portion unites with the esophagus. The pharynx unites with the nasal chambers, mouth, larynx and eustasian tubes.
The pharynx is divided into three parts: *nasopharynx *oropharynx *laryngopharynx
The pharynx is used as passage for both air and food. Depending on the species it may also have a roll in vocalization
The Larynx This is commonly called the voice box and is located just below the pharynx and it serves as a passage for air. The epiglottis is a lid like structure that prevents food from entering the airway during swallowing
The larynx plays an important role is creating sound. Air passes through the glottis during expiration causing a vibration, producing a sound. (video)
The Trachea also called the windpipe is a tube formed of smooth muscle with numerous C shaped rings of cartilage embedded in the tissue. These rings prevent collapse of the structure.
The Bronchi the ends of the trachea separates into smaller airways called the primary bronchi
The bronchi is lined with a ciliated mucous membrane and have C shaped cartilage rings. These rings become complete as the bronchi enter the lungs. They then divide into smaller branches called the secondary branches and these divide into bronchioles which further divide into aveolar ducts
The aveolar ducts terminate into the aveolar sacs which are minute, squamous epithelium lined spaces that allow the lungs to achieve the primary function of oxygen and carbon dioxide exchange.
As the bronchioles get smaller, the cartilage rings begin to disappear. There are no rings in the aveolar ducts, sacs or aveoli.
The lungs are the primary structures of the respiratory system. The lungs occupy almost the entire thoracic space. Each lung contains millions of aveoli and capillaries.
The lungs are encased in a serous membrane called the visceral pleura. The thoracic cavity is lined with another membrane called the parietal pleura. These membranes reduce the friction during repiration
The space between these membranes is called the pleural cavity or potential space.
The thorax (chest cavity) is lined with a membrane similar to the covering of the lungs. This allows the lubrication of both surfaces during respiration This membrane is divided into the: *right pleural cavity *left pleural cavity *mediastinum
The mediastinum contains the heart, thymus, esophagus, trachea, bronchi, nerves, arteries, veins and lymphatic vessels.
The Diaphragm: This is a dome shaped musculomembranous partition separating the thoracic and abdominal cavity. It attaches to the lumbar and abdominal cavities. It attaches to the lumbar vertebra, lower ribs and sternum
The diaphragm is the primary muscle of respiration. During inspiration, it contracts, flattens and lowers. This increases the capacity of the thoracic cavity. On expiration the diaphragm relaxes and returns to it’s normal position
Video part 2 and 3 WARNING!!!! This video of the anatomy of humans…. it is graphic.
The process of respiration: The respiratory cycle is divided into three parts: *inspiration *expiration *rest : the interval between inspiration and expiration
Respiration involves oxygen being passed throughout the body by circulation and carbon dioxide wastes being exhaled. The amount of oxygen retained by tissue depends on the need. Tissue does not store oxygen and tissue only takes in as much oxygen as it needs.
During exercise the oxygen requirement can be more than doubled. The flow of air in and out of the lungs depends on changes in the thoracic cavity. Inspiration and expiration are in accordance with the pressure differences between the atmosphere and air in the lungs
Tidal volume (TV): the volume of air inspired or expired during ordinary respiration
Inspiratory reserve volume (IRV): the maximum volume of air that can be forcibly inspired in addition to tidal air.
Expiratory reserve volume (ERV): the volume of air that can be forcibly expelled in addition to tidal air. Some air will always be trapped in the alveoli no matter how forcibly an animal exhales due to intrathoracic pressure.
Residual Volume (RV): The volume of air trapped in the alveoli
Minimal volume: the small amount of air left in the alveoli after a total lung collapse. When the thoracic pressure is equal to the atmospheric pressure
Vital capacity (VC): the largest amount of air that can be moved in and out of the lungs. The sum of the total of inspiratory and expiratory reserve volumes plus the tidal volume
The nerves from the brain that pass down the chest wall and diaphragm to control respiration
Vagus nerve: originates in the brain and sends branches to the larynx, heart, bronchi, esophagus, stomach, liver and abdomen.
Phrenic nerve: originates in the cervical spine and passes to the diaphragm
Thoracic nerve: originates in the thoracic spinal cord, these are the nerves of the muscles of the thorax
- Lungs pharynx
- Lumen of larynx
- Pharynx and larynx
- Pharynx and larynx and trachea
- Respiratory system voice box
- Copyright
- Which organs are involved in respiratory system
- Chapter 13 respiratory system
- The nose genre
- Wide philtrum
- What is the conducting zone of the respiratory system
- Invertebrate digestive system
- Germ layers
- Organs forming the respiratory passageway
- Upper respiratory tract
- Figure 13-1 respiratory system
- Site:slidetodoc.com
- Duodenum function
- How respiratory system work with circulatory system
- Circulatory system and respiratory system work together
- Sensory system organs
- Process of excretory system
- Accessory organ of the digestive system
- Accessory organs of the digestive system
- Accessory organ of the digestive system
- Lymphatic system and urinary system
- Formation of lymph
- Reticular cell
- Lymphatic system organs and functions
- Organs of the sensory system
- Chapter 16 matching question 6-10
- Bronchi and bronchioles
- Arytenoid muscle
- Larynx epithelium
- Parts of the throat
- Soft paired cone shaped organs
- Quadrangular membrane
- Larynx and trachea
- Cartilago laryngis
- Floppy larynx baby
- Intrinsic laryngeal muscles
- Quadrangular ligament
- Cartilago cuneiformis larynx
- Recessus piriformis
- Larynx medical term
- Muscles extrinsèques du larynx
- Thuddicum
- Larynx
- Lig vestibulare
- Larynx histology
- Larynx funtion
- Partial vs complete recurrent laryngeal nerve injury
- Cat digestive system anatomy