Respiratory System Diagram for IBS Lab 9 Review Sheet.

Let’s go step by step to label the structures on the respiratory system diagram.

We are given 11 numbered parts, and we need to match each number with the correct structure from the list provided in the image (some are already filled in as examples).

Here’s what we know from standard human anatomy of the respiratory system:

- The nose is at the top — that’s where air enters. So #1 = Nose ✔ (already labeled)
- Behind the nose is the pharynx — throat area. That’s #2 → Pharynx ✔ (already labeled)
- Below the pharynx is the larynx — voice box. That’s #3 → Larynx ✔ (already labeled)
- Then comes the trachea — windpipe. That’s #4 → Trachea ✔ (already labeled)
- The trachea splits into two bronchi — one for each lung.
- Right main bronchus goes to right lung → #5 → Right main bronchus ✔ (already labeled)
- Left main bronchus goes to left lung → #6 → Left main bronchus ✔ (already labeled)
- Inside the lungs, the bronchi branch into smaller tubes called bronchioles. In the diagram, #7 points to a small branching tube inside the lung → Bronchiole
- The big organs on either side are the lungs → #8 → Lungs ✔ (already labeled)
- At the bottom, under the lungs, is the diaphragm — muscle that helps you breathe → #9 → Diaphragm ✔ (already labeled)
- On the left side of the chest (right side of diagram), there’s a rib shown → #10 → Rib ✔ (already labeled)
- Wait — let’s check numbering again.

Looking carefully at the diagram labels:

Numbered positions:

1 → Nose
2 → Pharynx
3 → Larynx
4 → Trachea
5 → Right main bronchus
6 → Left main bronchus
7 → ? (points to small branches inside lung) → Bronchiole
8 → Lungs
9 → Diaphragm
10 → Rib
11 → ? (points to tiny sac-like structures at end of bronchioles) → Alveoli

Wait — in the original image, some boxes are pre-filled:

From the user’s image description:

Already filled:
- 1: Nose
- 2: Pharynx
- 3: Larynx
- 4: Trachea
- 5: Right main bronchus
- 6: Left main bronchus
- 8: Lungs
- 9: Diaphragm
- 10: Rib

So missing are:
- 7 → should be Bronchiole (smaller airways inside lung)
- 11 → should be Alveoli (tiny air sacs where gas exchange happens)

But wait — looking back at the user’s uploaded text, it says:

“Label the following structures...”

And lists:

Nose
Pharynx
Larynx
Trachea
Right main bronchus
Left main bronchus
Lungs
Diaphragm
Rib

That’s only 9 terms — but there are 11 numbers.

Ah — perhaps the diagram includes more detailed structures like bronchiole and alveoli even if not listed? But the instruction says “label the following structures” — meaning use only those listed?

Wait — re-examining the user’s input:

In the image transcription, under “1) Label the following structures on the diagram below:”, then it shows numbered blanks with some already filled.

Actually, looking at the layout:

The diagram has 11 numbered arrows pointing to parts.

Some have purple boxes with answers already written:

- 1: Nose
- 2: Pharynx
- 3: Larynx
- 4: Trachea
- 5: Right main bronchus
- 6: Left main bronchus
- 8: Lungs
- 9: Diaphragm
- 10: Rib

So unfilled are:

- 7 → points to internal branching within lung → likely Bronchiole
- 11 → points to cluster of sacs at end → Alveoli

But “Bronchiole” and “Alveoli” are NOT in the initial list of structures to choose from.

Wait — maybe I misread. Let me check the original problem statement again.

User wrote:

> Use a different font color to write all your answers is required.
> Avoid copying & pasting from other sources...
> NOTE: Structures of Respiratory system will be identified in the Final pdf document.

Then: “1) Label the following structures on the diagram below:”

And then the diagram with 11 numbers.

But in the text version provided, it seems like the student is supposed to fill in ALL 11, using the terms that make sense anatomically.

Perhaps the “following structures” refers to the ones typically taught — including bronchiole and alveoli.

Alternatively, maybe #7 is meant to be “Lung” but #8 is already Lung? No, #8 is clearly the whole lung organ.

Another possibility: sometimes #7 might be labeled as “Bronchus” but we already have main bronchi at 5 and 6.

Standard labeling:

After trachea (#4) bifurcates into right and left main bronchi (#5 and #6), they enter the lungs and divide into lobar bronchi, then segmental, then bronchioles.

#7 is pointing to a smaller branch inside the lung — so bronchiole.

#11 is pointing to the grape-like clusters — alveoli.

Since the note says “Structures of Respiratory system will be identified”, and doesn’t restrict to only the 9 listed, I think we should include bronchiole and alveoli for 7 and 11.

But let’s double-check common textbook diagrams.

In many basic respiratory system diagrams:

- 1: Nasal cavity / Nose
- 2: Pharynx
- 3: Larynx
- 4: Trachea
- 5: Right primary bronchus
- 6: Left primary bronchus
- 7: Bronchiole (or sometimes just “bronchus” but since main are taken, bronchiole makes sense)
- 8: Lung
- 9: Diaphragm
- 10: Rib
- 11: Alveolus (singular) or Alveoli (plural)

Yes, this is standard.

Therefore, the complete labeling is:

1. Nose
2. Pharynx
3. Larynx
4. Trachea
5. Right main bronchus
6. Left main bronchus
7. Bronchiole
8. Lungs
9. Diaphragm
10. Rib
11. Alveoli

Even though “Bronchiole” and “Alveoli” weren’t explicitly listed in the initial bullet points, they are essential respiratory structures and fit the diagram perfectly. Also, the note says “structures of respiratory system will be identified”, implying all relevant ones.

Moreover, in the user’s image transcription, the word “Bronchiole” appears near #7 in the diagram description — actually, looking back:

In the user’s message, under the diagram, it says:

“7 Bronchiole” — wait no, let me read carefully:

Actually, in the user’s input, after the diagram sketch, it says:

```
Nose 1
2 Pharynx
Larynx 3
4 Trachea
5
Right main 6 Left main bronchus
bronchus 7
8 Lungs
Diaphragm 9 10 Rib
11
```

Wait — this formatting is messy. Actually, looking at the original problem as presented:

It seems that the student is to fill in the blank boxes next to each number.

In the image, some boxes are pre-filled with purple text:

For example:

Next to 1: "Nose"
Next to 2: "Pharynx"
etc.

And for 7, 11 — the boxes are empty.

Also, in the list above the diagram, it says:

“Label the following structures...” and then lists:

Nose
Pharynx
Larynx
Trachea
Right main bronchus
Left main bronchus
Lungs
Diaphragm
Rib

That’s 9 items.

But there are 11 numbers.

This suggests that perhaps two structures are repeated or something else.

Wait — maybe #7 is “Lung” but #8 is also lung? No.

Another idea: perhaps #7 is “Bronchus” but we already have main bronchi.

I recall that in some diagrams, #7 might be labeled as “Secondary bronchus” or “Bronchiole”.

Given that #11 is clearly alveoli, and it's a key structure, I think we must include it.

Perhaps the “following structures” list is incomplete, and we’re expected to know the full set.

To resolve this, let’s think logically:

The respiratory system pathway:

Air enters through Nose (1) → Pharynx (2) → Larynx (3) → Trachea (4) → divides into Right Main Bronchus (5) and Left Main Bronchus (6) → these enter lungs and branch into smaller bronchi and then bronchioles (7) → which end in alveoli (11) where gas exchange occurs.

The lungs (8) contain all these internal structures.

Diaphragm (9) is below.

Rib (10) protects the thoracic cavity.

So anatomically, 7 should be Bronchiole and 11 should be Alveoli.

I think it’s safe to go with that.

Final Answer:

1. Nose
2. Pharynx
3. Larynx
4. Trachea
5. Right main bronchus
6. Left main bronchus
7. Bronchiole
8. Lungs
9. Diaphragm
10. Rib
11. Alveoli