Cycle 6: August 13th to 19th

Hi guys:

This cycle we will work on Human respiratory system.

Read this, and answer the chart in your notebook

The diagram is similar to the one without labels down the page.

The Human Respiratory System

The diagram above must be completed, use the follow chart to label the names of each part.

Place the numbers of the corresponding parts into the number columns.

Number	Name of Part	Number	Name of Part
	Nasal passages		Pharynx (throat)
	Mouth		Trachea
	Larynx		Left bronchus
	Right upper lobe of lung		Bronchioles
	Right bronchus		Alveoli
	Diaphragm (muscle)

Functions of Various Parts of the Respiratory System

Nose	A nose is a nose is a nose. Smelling, tasting and breathing all start here. The size, location, mucous lining and tiny hairs (cilia) inside help prevent foreign objects to enter and to trap large air impurities before being drawn further into the respiratory system. Achooo! Out with the bad...bugs and carbon dioxide.
Mouth	Mouth breathing can also be remembered as 'the big gulp', or 'plan B' for air entry. Like the nose, it has many functions. It is the starting point of the digestive system as well as a secondary inhaler and exhaler.
Larynx	The larynx has three main functions: 1) a passageway for air, 2) a valve to close off the air passage from the digestive one (the epiglottis) like a hinged trap door, and 3) as a voice box.
Lungs	The lungs are the essential organs of respiration. The main function of the lungs is to exchange carbon dioxide for oxygen and vice versa. Each lung is enclosed separately within two membranes, like a balloon inside a bag inside a bag.
Right bronchus	There are 2 main bronchi (Latin plural of bronchus): the right and left, each leading to a lung. If you accidentally breathe, or aspirate, a very small piece of food that gets past the trachea, it is most likely to fall and be pulled into the right main bronchus. If a peanut gets this far, what do you think could happen?
Diaphragm	This muscular structure acts as a floor to the chest (thoracic) cavity as well as a roof to the abdomen. It helps to expand and contract the lungs, forcing air into and out of them.
Pharynx	The pharynx is shared with the digestive system from the tongue down to the epiglottis. Food goes on down the esophagus and air passes on through the trachea - but never both at the same time!
Trachea	This armored tube allows air to pass beyond the larynx to where it divides into the left and right bronchi. The protective 'Cs' or rings of cartilage also provide protection to the digestive system's esophagus right behind it.
Left bronchus	The left one has a sharper bend due to the presence of the heart and major blood vessels directly underneath it.
Bronchiole	Each bronchus divides and subdivides into smaller and smaller branches, the bronchioles, just like tree branches that get smaller as they grow up and out. By the time the air has reached here from outside, it has been warmed up to body temperature, filtered and moisturized.
Trachea, bronchi, and bronchioles	These three portions of our airways also have rings of muscle along their length as well as glands lining them.  These glands produce mucous that traps particles of dirt. Eventually, this sticky stuff and its trapped dirt are coughed up and cleared out.  With asthma, these sensitive muscles tighten, making all the airways smaller and more difficult to breathe through, and excessive mucus is produced, sometimes flooding the airways.
Alveoli	These tiny air cells, or sacs, are the 'leaves' of our respiratory tree. They resemble bunches of grapes and are the link between the respiratory and circulatory systems. Gas exchange happens here - I'll trade you fresh oxygen (O2) for your used carbon dioxide (CO2).

Print this Lab worksheet for the Lab exercise!!

https://drive.google.com/file/d/0B-EoRseIFS9BdGV2ekhxZlc0V0E/edit?usp=sharing

See you on class!!!!