3. • Pharynx – is a tube like structure that connects
your nasal and oral cavities.
• Larynx – is located in your throat and is what
allows you to be able to speak. When you take in
air, the larynx vibrates and this is what makes your
voice
• Trachea – is a pipe like tube that does take the air
from the mouth to the lungs.
• Bronchi – is a tube that leads to trachea to the
lungs. Its function is to move air into the left and
right lung.
• Alveoli – are tiny air pockets in the lungs. The
main function of alveoli is to diffuse the carbon
dioxide in the blood.
4. • Nose/Mouth – entrance of air into the lungs
• Epiglottis – stops food and liquid from going
down into your airway. It let’s air pass through the
larynx and respiratory system.
• Diaphragm – help the lungs to expand and to
tighten.
• Lungs – are paired organs in your chest that
perform respiration. The main organ in respiration
5.
6. You breathe with the help of your diaphragm (which is a
dome-shaped muscle under your rib cage) and other muscles in
your chest and abdomen. These muscles will literally change
the space and pressure inside your body cavity to accommodate
your breathing. When your diaphragm pulls down, it is making
room for the lungs to expand. The lungs get bigger with air and
pushes the diaphragm down. The diaphragm also lowers the
internal air pressure. Outside of your body, the air pressure is
greater and you suck in air when you inhale. The air then
expands your lungs like two balloons being blown up. When
your diaphragm relaxes, it moves up and the cavity inside your
body gets smaller. Your muscles will then squeeze your rib cage
and your lungs begin to collapse as the air is pushed up and out
your body when you exhale.
7. The air we breath in normally enters through our nose.
This is because The hairs inside our nostrils catch
pathogens(germs) and particles. Also when the air
enters our nasal cavity small hairs called cilia further
help to catch pathogens, as well as moistening and
warming the air. The olfactory receptors which are
located at the roof of your nasal cavity detect orders.
This is why you smell things without actually realizing
you were trying to.
If you have seen the roots of an uprooted tree u will
follow it, the pipes(air vents) keep on splitting into
smaller and smaller dia pipes in three dimensions, till
the size is really small( called alveoli) where the
haemoglobin gives up co2 and takes up o2.
8.
9. External respiration, commonly known as breathing, is
the exchange of oxygen and carbon dioxide between an
animal and its environment. Most animals use
specialized organs or organ systems, such as lungs,
trachea, or gills, for external respiration. In all cases,
exchange of gases between the environment and an
animal occurs by diffusion through a wet surface on
the animal which is permeable to oxygen and carbon
dioxide. Diffusion is the random movement of
molecules and causes a net movement of molecules
from a region of high concentration to a region of low
concentration. Thus, oxygen moves into an organism
because its concentration is lower inside than in the
environment (air or water); carbon dioxide moves out
of an organism because its concentration is higher
inside than in the environment.
10. the metabolic processes whereby certain organisms obtain energy
from organic molecules; processes that take place in the cells and
tissues during which energy is released and carbon dioxide is
produced and absorbed by the blood to be transported to the
lungs
