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TMU MBBS ยท 1st Year
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TMU MBBS ยท Anatomy Final Exam Preparation

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Practice every format of your TMU Anatomy exam. Real questions from the Q-Bank V2.

๐Ÿ“ MCQ 45 pts
โ˜‘๏ธ Multi-answer 15 pts
โœ… True/False 10 pts
โœ๏ธ Essay 30 pts
Practice Unit:
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Full Exam Simulator โ€” Heart Anatomy

25 MCQs ยท 20 T/F ยท 25 Definitions. Random order. Score tracked.

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45 marks ยท 25 questions
MCQ Practice
25 real TMU questions on Heart anatomy. Random order. Reveals explanation after each answer.
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10 marks ยท 20 statements
True / False Blast
20 rapid-fire anatomy statements. Quick reflex training for the T/F section of your exam.
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25 definitions ยท heart unit
Definition Drill
Flash-card style definition practice. See the term, try to define it, then reveal and rate yourself.
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30 marks ยท 2 essay Qs
Essay Prep
TMU-format essay questions with full model answers + marking guides. Structure your answers.

๐ŸŽฏ TMU Exam Tips โ€” Heart Unit

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Professor's Favorites
Questions that appear every year
Q: Which chamber forms the apex?โ†’ Left ventricle
Q: Which chamber forms the base?โ†’ Left atrium
Q: Where is the SA node?โ†’ Upper crista terminalis, posterior RA near SVC
Q: What is the "widow-maker" artery?โ†’ LAD (anterior interventricular)
Q: S1 (lub) is produced by closure of?โ†’ AV valves (mitral + tricuspid)
Q: Which is the most frequently diseased valve?โ†’ Mitral valve (rheumatic fever)
Q: Moderator band is in which chamber?โ†’ Right ventricle
Q: Coronary sinus drains into?โ†’ Right atrium
Q: What does the fossa ovalis represent?โ†’ Closed fetal foramen ovale
Q: IVS anterior 2/3 supplied by?โ†’ LAD (left anterior descending)
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Exam Traps
Mistakes that cost marks
Base = inferior Base is POSTERIOR (left atrium). Apex = inferior tip.
Tricuspid has 2 cusps Tricuspid = 3 cusps. Bicuspid/mitral = 2.
Fossa ovalis in IVS It's in the interatrial septum, right side.
Crista terminalis in RV It's a ridge in the right atrium.
Moderator band in LV It's in the right ventricle โ€” carries the right bundle branch.
Pulmonary veins โ†’ RA Pulmonary veins โ†’ left atrium. RA gets SVC + IVC + coronary sinus.
SA node in IVS SA node is in posterior RA wall near SVC, not the septum.
AV node = pacemaker SA node is the primary pacemaker. AV node only if SA fails.
Coronary sinus = aortic sinus They are different. Coronary sinus = venous channel in AV groove.
LCA arises from right sinus RCA = right sinus ยท LCA = left aortic sinus.
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Time Strategy
How to tackle the TMU paper
MCQ ยท 45 pts45 questions, 45 minutes โ€” 1 minute each. Skip hard ones, come back. Never leave blank โ€” no negative marking.
Multi-answer ยท 15 ptsRead very carefully โ€” ALL correct options needed for full mark. Start with what you are certain about.
T/F ยท 10 pts20 statements, 10 minutes โ€” 30 seconds each. Trust your first instinct. Overthinking costs marks on T/F.
Essay ยท 30 pts3 essays ร— 10 marks. Spend 1 minute outlining before writing. Use numbered headings. Marks are for accuracy and structure, not volume.
Definition tip: Every definition needs 3 things โ€” (1) what it is, (2) where it is, (3) why it matters (clinical relevance = bonus mark).
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Clinical Case Questions
How the professor tests anatomy knowledge in exam format โ€” click to reveal answer
"A 45-year-old man presents with sharp chest pain that is worse on inspiration and lying flat, but relieved by leaning forward. On auscultation, a scratchy rubbing sound is heard."
Q: Which structure is inflamed? What is the diagnosis?
Structure โ†’ Pericardium (serous layer) Diagnosis: Pericarditis
Leaning forward relieves pain because it moves the heart away from the inflamed parietal pericardium. The friction rub is pericardial, not pleural โ€” ask patient to hold breath to distinguish.
"A trauma patient develops hypotension, raised JVP, and muffled heart sounds. Pulsus paradoxus is noted. Chest X-ray shows a globular enlarged cardiac shadow."
Q: What is filling the pericardial cavity? What is this emergency called?
Structure โ†’ Pericardial cavity (filled with blood) Diagnosis: Cardiac Tamponade
Beck's triad: hypotension + raised JVP + muffled sounds. The fibrous pericardium is inextensible โ€” even 150 mL of rapid accumulation compresses the heart. Treated by pericardiocentesis.
"A 60-year-old has a sudden crushing chest pain radiating to the jaw. ECG shows ST elevation in V1โ€“V4. He develops a new left bundle branch block."
Q: Which artery is occluded? Why did LBBB develop?
Artery โ†’ LAD (Left Anterior Descending) Reason for LBBB: LAD supplies anterior 2/3 of IVS where the left bundle branch runs
LAD is the "widow-maker." Anterior MI (V1โ€“V4) = LAD territory. The left bundle branch runs in the anterior septum โ€” ischaemia interrupts conduction โ†’ LBBB on ECG.
"An elderly woman with rheumatic fever history develops progressive breathlessness on exertion, a low-pitched rumbling murmur at the cardiac apex during diastole, and an opening snap."
Q: Which valve is diseased? In which direction does blood flow abnormally?
Valve โ†’ Mitral valve (bicuspid valve) Diagnosis: Mitral Stenosis
Mitral stenosis obstructs LA โ†’ LV flow in diastole โ†’ LA enlargement โ†’ pulmonary hypertension โ†’ breathlessness. Most common valve affected by rheumatic fever. Diastolic murmur at apex with opening snap is classic.
"A 55-year-old patient with an inferior MI develops sudden complete dissociation between atrial and ventricular rhythms on ECG. HR = 35/min. Patient becomes haemodynamically unstable."
Q: Which node is affected? Which artery commonly supplies it?
Node โ†’ AV node (complete / 3rd degree heart block) Artery โ†’ Right Coronary Artery (RCA) in ~90% of cases
Inferior MI = RCA territory. The AV nodal artery is a branch of the RCA in most people. Complete AV block = no impulse transmission from atria โ†’ ventricles use slow escape rhythm โ†’ emergency pacemaker needed.
"A 25-year-old with a stroke is found to have a right-to-left shunt on echocardiography with bubble contrast. No structural heart disease is identified."
Q: Which structure failed to close at birth? Where is it located?
Structure โ†’ Patent Foramen Ovale (PFO) Location: Interatrial septum (right side = fossa ovalis)
The foramen ovale normally closes at birth when LA pressure exceeds RA pressure. PFO persists in ~25% adults. A DVT clot can pass from RA โ†’ LA through the PFO โ†’ systemic embolism โ†’ paradoxical stroke.
MCQ Practice โ€” Heart 1:00
Question 1 of 25
Score: 0 / 0
0/25
Questions answered correctly
True / False โ€” Heart Anatomy
Statement 1 of 20
Score: 0 / 0
T/F answered correctly
Definition Drill โ€” Heart Unit
Term 1 of 25
0 / 25 done
Definitions you knew

Essay Preparation

30 Marks ยท 2 Essays

Study each question, try to outline your answer mentally, then expand to see the full model answer and marking guide.

Essay 1
Describe the chambers of the heart and the blood flow through them. (10 marks)
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Introduction

The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle โ€” divided into right (pulmonary) and left (systemic) circulations by the interventricular and interatrial septa.

Right Side โ€” Pulmonary Circuit

Right atrium receives deoxygenated blood via: superior vena cava (upper body), inferior vena cava (lower body), coronary sinus (cardiac veins). Blood passes through the tricuspid valve (3 cusps: anterior, posterior, septal) into the right ventricle. The crista terminalis divides the smooth sinus venarum from the rough pectinate part.

Right ventricle pumps blood through the pulmonary valve into the pulmonary trunk โ†’ lungs. Contains moderator band (right bundle branch) and coarse trabeculae carneae.

Left Side โ€” Systemic Circuit

Left atrium receives oxygenated blood via 4 pulmonary veins. Blood passes through the mitral (bicuspid) valve (2 cusps: anterior, posterior) into the left ventricle.

Left ventricle has the thickest wall (~11 mm). Pumps blood through the aortic valve into the ascending aorta for systemic distribution.

Septa

  • Interatrial septum โ€” contains fossa ovalis (remnant of foramen ovale)
  • Interventricular septum โ€” muscular (inferior) + membranous (superior) parts
Marking guide: Each chamber defined + what it receives (4 marks) ยท Valves correctly named (2 marks) ยท Flow sequence Lโ†’R correct (2 marks) ยท Septa + fossa ovalis (2 marks) = 10 marks
Essay 2
Describe the conducting system of the heart and explain how it coordinates cardiac contraction. (10 marks)
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Components & Locations

1. SA node (pacemaker) โ€” upper crista terminalis, posterior RA wall near SVC opening. Fires 60โ€“100/min. Supplied by SA nodal artery (RCA 60%, LCA 40%).

2. AV node โ€” floor of RA at apex of Triangle of Koch (bounded by: tendon of Todaro, septal tricuspid leaflet, coronary sinus orifice). Delays impulse ~0.1 s to allow atrial completion.

3. AV bundle (Bundle of His) โ€” runs in membranous IVS. Only electrical bridge between atria and ventricles (fibrous skeleton insulates them).

4. Right bundle branch โ€” travels via moderator band to anterior papillary muscle of RV โ†’ Purkinje fibres.

5. Left bundle branch โ€” divides into anterior and posterior fascicles โ†’ LV Purkinje fibres.

6. Purkinje fibres โ€” terminal branches conducting from endocardium outward โ†’ rapid ventricular contraction from apex upward.

Coordination Sequence

SA fires โ†’ atria contract โ†’ impulse reaches AV node โ†’ 0.1 s delay โ†’ His bundle โ†’ branch blocks โ†’ Purkinje โ†’ apex-first ventricular contraction โ†’ efficient ejection.

Clinical Significance

  • SA node damage โ†’ sick sinus syndrome
  • AV node damage โ†’ heart block (1ยฐ, 2ยฐ, 3ยฐ)
  • LAD occlusion โ†’ RBBB (moderator band ischaemia)
Marking guide: Each component with location (6 marks) ยท Sequence correct (2 marks) ยท Clinical notes (2 marks) = 10 marks