Solved Intermediate Physiology Lab Pre-lab Worksheet: | Chegg.com - Free Printable

Let's solve this step-by-step based on the diagram and the list of terms provided.

Step 1: Understand the Respiratory System Anatomy

The respiratory system consists of two main parts:
- Upper respiratory tract: Includes structures from the nose to the larynx.
- Lower respiratory tract: Includes the trachea, bronchi, bronchioles, and lungs (including alveoli).

Now let’s identify each labeled part in the figure:

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Step 2: Identify Each Label (a–k)

We’ll go through each letter and assign the correct term.

#### Label a – The large tube going down the neck
This is the trachea (windpipe), which connects the larynx to the bronchi.

✔ a = trachea

#### Label b – The left lung
This is the left lung, which is slightly smaller than the right due to the heart's position.

✔ b = left lung

#### Label c – The diaphragm at the bottom of the lungs
This is the diaphragm, the primary muscle of respiration that contracts and flattens during inhalation.

✔ c = diaphragm

#### Label d – The nasal cavity (top of the head)
This is the nasal cavity, where air enters through the nostrils.

✔ d = nasal cavity

#### Label e – Behind the nasal cavity, leading to the throat
This is the pharynx, the common passageway for air and food.

✔ e = pharynx

#### Label f – Below the pharynx, voice box
This is the larynx, also known as the voice box.

✔ f = larynx

#### Label g – The group of structures from d to f
This includes the nasal cavity, pharynx, and larynx, which together make up the upper respiratory tract.

✔ g = upper respiratory tract

#### Label h – The branching tubes from the trachea into the lungs
These are the bronchi (singular: bronchus). The trachea splits into two main bronchi, one for each lung.

✔ h = bronchi

#### Label i – The right lung
This is the right lung, larger than the left.

✔ i = right lung

#### Label j – Smaller branches of the bronchi
These are bronchioles, smaller airways that branch from the bronchi and lead to alveoli.

✔ j = bronchiole

#### Label k – Tiny sacs at the end of bronchioles
These are the alveoli, where gas exchange occurs between air and blood.

✔ k = alveoli

#### Label l – The entire structure from the trachea down to the alveoli
This includes the trachea, bronchi, bronchioles, and alveoli, which make up the lower respiratory tract.

✔ l = lower respiratory tract

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Final Answer Key:

| Label | Structure |
|-------|-------------------------|
| a | trachea |
| b | left lung |
| c | diaphragm |
| d | nasal cavity |
| e | pharynx |
| f | larynx |
| g | upper respiratory tract |
| h | bronchi |
| i | right lung |
| j | bronchiole |
| k | alveoli |
| l | lower respiratory tract |

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✔ Check Off Terms Used:

- [x] bronchi
- [x] left lung
- [x] alveoli
- [x] trachea
- [x] pharynx
- [x] diaphragm
- [x] larynx
- [x] lower respiratory tract
- [x] bronchiole
- [x] nasal cavity
- [x] right lung
- [x] upper respiratory tract

All terms have been used correctly.

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Summary:

You’ve successfully labeled all parts of the respiratory system. The upper respiratory tract includes structures from the nose to the larynx, while the lower respiratory tract includes everything from the trachea down to the alveoli. The diaphragm plays a key role in breathing by contracting and expanding the thoracic cavity.

Let me know if you'd like a printable version or explanation of how air moves through these structures!