NCLEX-PN COMPREHENSIVE
EXAM QUESTIONS WITH
DIAGRAMS, VERIFIED ANSWERS
& COMPLETE RATIONALES 2026
DIAGRAM 1: THE HEART
┌──────────────────────────────────────
───┐
│ SUPERIOR VENA CAVA │
│ │ │
│ ┌─────────────┴─────────────┐
│
│ │ │ │
│ ▼ ▼ │
│ RIGHT LEFT │
│ ATRIUM ATRIUM │
│ │ │ │
│ │ ┌───────────┐ │ │
│ ▼ │ │ ▼ │
│ TRICUSPID│ PULMONARY│ MITRAL │
, │ VALVE │ VALVE │ VALVE │
│ │ └─────┬─────┘ │ │
│ ▼ │ ▼ │
│ RIGHT │ LEFT │
│ VENTRICLE │ VENTRICLE │
│ │ │ │ │
│ ▼ │ ▼ │
│ PULMONARY │ AORTIC │
│ VALVE │ VALVE │
│ │ │ │ │
│ ▼ │ ▼ │
│ PULMONARY │ AORTA │
│ ARTERY │ │ │
│ │ │ │ │
│ └───────────┘ │ │
│ │ │ │
│ ▼ ▼ │
│ LUNGS BODY TISSUES │
└──────────────────────────────────────
───┘
```
**1. Based on the diagram above, which structure receives
deoxygenated blood from the body?**
,A) Left atrium
B) Right atrium
C) Left ventricle
D) Aorta
**B - correct-answer -** The right atrium receives deoxygenated
blood from the body through the superior and inferior vena
cava. Option A (Left atrium) receives oxygenated blood from
the lungs. Option C (Left ventricle) pumps oxygenated blood to
the body. Option D (Aorta) carries oxygenated blood away from
the heart.
---
**2. Which valve separates the right atrium from the right
ventricle?**
A) Mitral valve
B) Aortic valve
C) Tricuspid valve
D) Pulmonary valve
**C - correct-answer -** The tricuspid valve separates the right
atrium from the right ventricle. Option A (Mitral valve) separates
the left atrium from the left ventricle. Option B (Aortic valve)
, separates the left ventricle from the aorta. Option D (Pulmonary
valve) separates the right ventricle from the pulmonary artery.
---
**3. What is the primary function of the left ventricle?**
A) Receiving deoxygenated blood from the body
B) Pumping oxygenated blood to the body
C) Pumping deoxygenated blood to the lungs
D) Receiving oxygenated blood from the lungs
**B - correct-answer -** The left ventricle pumps oxygenated
blood to the body through the aorta. Option A describes the
right atrium. Option C describes the right ventricle. Option D
describes the left atrium.
---
### DIAGRAM 2: THE RESPIRATORY SYSTEM
```
┌─────────────┐
│ NASAL │
│ CAVITY │
EXAM QUESTIONS WITH
DIAGRAMS, VERIFIED ANSWERS
& COMPLETE RATIONALES 2026
DIAGRAM 1: THE HEART
┌──────────────────────────────────────
───┐
│ SUPERIOR VENA CAVA │
│ │ │
│ ┌─────────────┴─────────────┐
│
│ │ │ │
│ ▼ ▼ │
│ RIGHT LEFT │
│ ATRIUM ATRIUM │
│ │ │ │
│ │ ┌───────────┐ │ │
│ ▼ │ │ ▼ │
│ TRICUSPID│ PULMONARY│ MITRAL │
, │ VALVE │ VALVE │ VALVE │
│ │ └─────┬─────┘ │ │
│ ▼ │ ▼ │
│ RIGHT │ LEFT │
│ VENTRICLE │ VENTRICLE │
│ │ │ │ │
│ ▼ │ ▼ │
│ PULMONARY │ AORTIC │
│ VALVE │ VALVE │
│ │ │ │ │
│ ▼ │ ▼ │
│ PULMONARY │ AORTA │
│ ARTERY │ │ │
│ │ │ │ │
│ └───────────┘ │ │
│ │ │ │
│ ▼ ▼ │
│ LUNGS BODY TISSUES │
└──────────────────────────────────────
───┘
```
**1. Based on the diagram above, which structure receives
deoxygenated blood from the body?**
,A) Left atrium
B) Right atrium
C) Left ventricle
D) Aorta
**B - correct-answer -** The right atrium receives deoxygenated
blood from the body through the superior and inferior vena
cava. Option A (Left atrium) receives oxygenated blood from
the lungs. Option C (Left ventricle) pumps oxygenated blood to
the body. Option D (Aorta) carries oxygenated blood away from
the heart.
---
**2. Which valve separates the right atrium from the right
ventricle?**
A) Mitral valve
B) Aortic valve
C) Tricuspid valve
D) Pulmonary valve
**C - correct-answer -** The tricuspid valve separates the right
atrium from the right ventricle. Option A (Mitral valve) separates
the left atrium from the left ventricle. Option B (Aortic valve)
, separates the left ventricle from the aorta. Option D (Pulmonary
valve) separates the right ventricle from the pulmonary artery.
---
**3. What is the primary function of the left ventricle?**
A) Receiving deoxygenated blood from the body
B) Pumping oxygenated blood to the body
C) Pumping deoxygenated blood to the lungs
D) Receiving oxygenated blood from the lungs
**B - correct-answer -** The left ventricle pumps oxygenated
blood to the body through the aorta. Option A describes the
right atrium. Option C describes the right ventricle. Option D
describes the left atrium.
---
### DIAGRAM 2: THE RESPIRATORY SYSTEM
```
┌─────────────┐
│ NASAL │
│ CAVITY │
