Balasanos, Lyn E.Curso, Angelie May R.

Dagandan, Bernadette L.Japson, Perlyn A.Urmeneta, Jayton

BESSIE MELANCHOLY BULANON

5:30-7:00 MW

• 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.

• 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

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.

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.

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.

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

THE END!