Respiratory and Endocrine System Flashcards
(199 cards)
The Respiratory System is also called …
The Pulmonary System
Main function of the respiratory system
Supply oxygen to the body’s cells and remove carbon dioxide.
CPR
cardiopulmonary resucitation
External respiration
When you breathe in, oxygen is brought into the lungs for the blood to pick up.
When you breathe out, you blow out carbon dioxide that has moved from the blood to the lungs.
Internal Respiration (Cellular Respiration)
Is parallel to the process involved in external respiration, but conducted at the cellular level.
Procces of Internal Respiration
After blood passing through the lungs picks up oxygen, the heart pumps the blood to the rest of the body.
The oxygen passes through the capillary walls and into the interstitial space, where the cells absorb the oxygen.
The cells release carbon dioxide as a byproduct of metabolism.
This carbon dioxide waste is picked up by the bloodstream and carried to the lungs for expiration.
The respiratory system is comprised of…
- Nose
- Pharynx
- Larynx
- Trachea
- Bronchi
- Lungs
- Diaphragm
Two main jobs of the nose
- Provides out bodies with warm, moistened oxygen.
- Holds the olfactory nerve that enables us to smell.
Inspiration
The movement of air into the lungs
The advantage of breathing through the nose:
- Warms, moistens, and filters air
(External nares are lined with mucous membranes and short, coarse hairs (cilia) that filter out foreign particles.
Mucus kills some germs and stops the growth of others.
Pharynx
Multipurpose tube leading from the back of the nose and mouth, down to the trachea (windpipe) and to the esophagus.
It allows air to reach your lungs and food to reach your stomach.
Larynx
Located between the pharynx and trachea. It’s also called the voice box because it houses the vocal cords.
Vocal cords are though bands of ligamentous tissue that vibrate to produce speech.
The size and tightness of the vocal cords determine the sound of your voice.
Glottis
The space between the vocal cords
Epiglottis
A leaf-shaped flap on top of the larynx, is responsible for sealing off the airway to the lungs when you swallow food or water.
Trachea
A long, hollow, smooth muscle tube that runs down the chest in front of the esophagus.
The trachea separates the upper respiratory system (above the neck) from the lower respiratory system (below the neck).
Those who are severely ill, undergoing surgery, or in an emergency situation can receive continuous, artificial ventilation by having a mechanical ventilator connected directly to the trachea- either through the mouth or by puncturing the skin in the neck area.
The ventilator then pushes and pulls air in and out of the lungs to continue supplying oxygen and removing carbon dioxide.
The trachea branches off into two main bronchi, and then the bronchi branch off to several bronchioles.
Bronchi (singular bronchus)
Lead to the right and left lungs.
After entering the lungs, the bronchi continue branching into smaller and smaller airways.
The smallest ones are called bronchioles.
alveoli (plural)
alveolus (singular)
The bronchioles open out into balloon-like pouches
Each alveolus (singular) expands and contracts with each inhalation or exhalation of air.
Capillary beds
contain the smallest blood vessels of the lungs, and they lie next to the thin tissue membranes of the alveoli.
Here, oxygen from the alveoli combines with hemoglobin, a protein in the red blood cells, and is carried to all parts of the body.
At the same time, carbon dioxide is transferred to the alveoli to be discarded by the body when you breathe out.
Right Lung…
Divided into three lobes.
Accommodates the liver.
Left lung…
Divided into two lobes.
Has a notch in it to accommodate the heart.
Heart and lungs are protected by…
Chest wall.
Diaphragm
Sits at the bottom of the lungs.
Each breath initiated by movement of diaphragm, internal and external intercostal muscles.
Upper respiratory system includes
- Nose
- Pharynx
- Larynx
- Trachea
Lower respiratory system includes
- Bronchi
- Bronchioles
- Lungs