A&P II Cardiovascular System Study Guide – Heart Anatomy,
Cardiac Cycle, ECG & Blood Flow
College / University Year 1–2 · Nursing, Allied Health, Health Sciences | USA, Canada, Australia,
UK & international
A comprehensive, high-yield A&P II Cardiovascular System Study Guide designed to make
complex cardiovascular concepts easier to understand, memorize, and review. The resource uses a
clear, exam-focused approach that connects heart anatomy, blood flow, cardiac conduction,
ECG/EKG fundamentals, cardiac cycle, cardiac output, blood pressure, vascular physiology, and
clinical applications into an integrated learning framework.
What Makes These Notes Useful
Built for efficient exam preparation, active recall, concept review, and last-minute revision, the
guide emphasizes important physiological relationships rather than isolated facts. Students can use
structured pathways, high-yield comparisons, formulas, worked examples, integrated ECG and
cardiac-cycle concepts, and concise clinical connections to strengthen understanding and improve
retention. Ideal for A&P II, nursing, allied health, health sciences, cardiovascular physiology,
ECG/EKG review, cardiac cycle revision, blood pressure concepts, and university-level exam
preparation.
Topics Covered
PART I — HEART ANATOMY
1. Cardiovascular System Overview
Functions of the cardiovascular system
Heart, blood and blood vessels
Pulmonary circulation
Systemic circulation
Pulmonary vs. systemic circuit
Oxygenated vs. deoxygenated blood
Relationship between cardiovascular and respiratory systems
2. Location and External Anatomy of the Heart
Thoracic cavity
Mediastinum
Base
Apex
, Pericardium
Fibrous pericardium
Serous pericardium
Epicardium
Pericardial cavity
Coronary sulcus
Anterior interventricular sulcus
Posterior interventricular sulcus
Auricles
Student-friendly:
Structure → Where is it? → What does it do?
Avoided lengthy textbook-style prose.
3. Layers of the Heart Wall
Focused on:
Epicardium → Myocardium → Endocardium
Students should be able to answer:
Which layer actually contracts?
Which layer lines the chambers?
Which layer is associated with the visceral serous pericardium?
Added a small comparison table.
4. Internal Anatomy of the Heart
This is one of the highest-value sections.
Chambers
Right side
Right atrium
Right ventricle
Left side
Left atrium
Left ventricle
,Internal structures
Interatrial septum
Interventricular septum
Pectinate muscles
Trabeculae carneae
Papillary muscles
Chordae tendineae
Important concept
Explained why the left ventricular wall is substantially thicker than the right ventricular wall.
Anatomy → Pressure → Function.
5. Heart Valves
Atrioventricular valves
Tricuspid valve
Mitral/bicuspid valve
Semilunar valves
Pulmonary semilunar valve
Aortic semilunar valve
For every valve:
Location → Opens when → Closes when → Prevents backflow toward
Then created a valve-position summary table.
PART II — BLOOD FLOW
6. Complete Blood-Flow Pathway
This should be a major memorization section.
The pathway in four stages:
Stage 1 — Systemic return
Body → venae cavae → right atrium
Stage 2 — Pulmonary circulation
Right ventricle → pulmonary trunk → pulmonary arteries → lungs
Stage 3 — Pulmonary return
, Lungs → pulmonary veins → left atrium
Stage 4 — Systemic distribution
Left ventricle → aorta → body
The complete pathway including every valve.
Critical exam distinction
Emphasize:
Pulmonary arteries carry deoxygenated blood.
Pulmonary veins carry oxygenated blood.
This is a classic source of confusion.
7. Coronary Circulation
Right coronary artery
Left coronary artery
Anterior interventricular artery
Circumflex artery
Cardiac veins
Coronary sinus
Focused on:
The myocardium needs its own blood supply.
Then connected coronary circulation to:
Ischemia
Angina
Myocardial infarction
PART III — CARDIAC CONDUCTION SYSTEM
8. Electrical Conduction System
Made it a visual sequence, not a wall of text.
The pathway
SA node → atrial myocardium → AV node → AV bundle → right/left bundle branches → Purkinje
fibers → ventricular myocardium
Explained each structure's role.
Key concept
Cardiac Cycle, ECG & Blood Flow
College / University Year 1–2 · Nursing, Allied Health, Health Sciences | USA, Canada, Australia,
UK & international
A comprehensive, high-yield A&P II Cardiovascular System Study Guide designed to make
complex cardiovascular concepts easier to understand, memorize, and review. The resource uses a
clear, exam-focused approach that connects heart anatomy, blood flow, cardiac conduction,
ECG/EKG fundamentals, cardiac cycle, cardiac output, blood pressure, vascular physiology, and
clinical applications into an integrated learning framework.
What Makes These Notes Useful
Built for efficient exam preparation, active recall, concept review, and last-minute revision, the
guide emphasizes important physiological relationships rather than isolated facts. Students can use
structured pathways, high-yield comparisons, formulas, worked examples, integrated ECG and
cardiac-cycle concepts, and concise clinical connections to strengthen understanding and improve
retention. Ideal for A&P II, nursing, allied health, health sciences, cardiovascular physiology,
ECG/EKG review, cardiac cycle revision, blood pressure concepts, and university-level exam
preparation.
Topics Covered
PART I — HEART ANATOMY
1. Cardiovascular System Overview
Functions of the cardiovascular system
Heart, blood and blood vessels
Pulmonary circulation
Systemic circulation
Pulmonary vs. systemic circuit
Oxygenated vs. deoxygenated blood
Relationship between cardiovascular and respiratory systems
2. Location and External Anatomy of the Heart
Thoracic cavity
Mediastinum
Base
Apex
, Pericardium
Fibrous pericardium
Serous pericardium
Epicardium
Pericardial cavity
Coronary sulcus
Anterior interventricular sulcus
Posterior interventricular sulcus
Auricles
Student-friendly:
Structure → Where is it? → What does it do?
Avoided lengthy textbook-style prose.
3. Layers of the Heart Wall
Focused on:
Epicardium → Myocardium → Endocardium
Students should be able to answer:
Which layer actually contracts?
Which layer lines the chambers?
Which layer is associated with the visceral serous pericardium?
Added a small comparison table.
4. Internal Anatomy of the Heart
This is one of the highest-value sections.
Chambers
Right side
Right atrium
Right ventricle
Left side
Left atrium
Left ventricle
,Internal structures
Interatrial septum
Interventricular septum
Pectinate muscles
Trabeculae carneae
Papillary muscles
Chordae tendineae
Important concept
Explained why the left ventricular wall is substantially thicker than the right ventricular wall.
Anatomy → Pressure → Function.
5. Heart Valves
Atrioventricular valves
Tricuspid valve
Mitral/bicuspid valve
Semilunar valves
Pulmonary semilunar valve
Aortic semilunar valve
For every valve:
Location → Opens when → Closes when → Prevents backflow toward
Then created a valve-position summary table.
PART II — BLOOD FLOW
6. Complete Blood-Flow Pathway
This should be a major memorization section.
The pathway in four stages:
Stage 1 — Systemic return
Body → venae cavae → right atrium
Stage 2 — Pulmonary circulation
Right ventricle → pulmonary trunk → pulmonary arteries → lungs
Stage 3 — Pulmonary return
, Lungs → pulmonary veins → left atrium
Stage 4 — Systemic distribution
Left ventricle → aorta → body
The complete pathway including every valve.
Critical exam distinction
Emphasize:
Pulmonary arteries carry deoxygenated blood.
Pulmonary veins carry oxygenated blood.
This is a classic source of confusion.
7. Coronary Circulation
Right coronary artery
Left coronary artery
Anterior interventricular artery
Circumflex artery
Cardiac veins
Coronary sinus
Focused on:
The myocardium needs its own blood supply.
Then connected coronary circulation to:
Ischemia
Angina
Myocardial infarction
PART III — CARDIAC CONDUCTION SYSTEM
8. Electrical Conduction System
Made it a visual sequence, not a wall of text.
The pathway
SA node → atrial myocardium → AV node → AV bundle → right/left bundle branches → Purkinje
fibers → ventricular myocardium
Explained each structure's role.
Key concept
