ANATOMY + PHYSIOLOGY COMMAND LAB

Learn the body as a connected system.

Move from structure → function → pathway → clinical meaning, then prove mastery with adaptive practice.

A&P
Heart
Nerve
Lung
Kidney
Systems unlocked5 / 15Cardiovascular + Respiratory active
Structures mastered3of 18 tracked concepts
Practice accuracy—Updates after practice
Study streak1 dayLocal demo streak
CONTINUE

Cardiovascular System

Pilot Module
24%

Continue with Blood Flow Through the Heart.

  • ✓ Orientation & chambers
  • ✓ Valves
  • → Blood-flow pathway
  • ○ Cardiac conduction
  • ○ Cardiac cycle
FOCUS

Mastery Signals

TODAY'S LAB

Build understanding, not memorization

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BODY SYSTEMS ATLAS

15 systems. One connected human body.

SYSTEM MODULE

Cardiovascular System

Structure, coronary circulation, electrical activity, cardiac mechanics, hemodynamics, and integrated clinical reasoning.

Deep Build v1.1
ANATOMY24tracked structures
PHYSIOLOGY8major mechanisms
PATHWAYS5interactive sequences
CLINICAL10reasoning cases
01

Heart Orientation

Location, mediastinum, surfaces, borders, apex, base, pericardium.

02

Chambers + Valves

Atria, ventricles, AV valves, semilunar valves, pressure-driven opening.

03

Blood Flow

Trace deoxygenated and oxygenated blood through pulmonary and systemic circuits.

04

Coronary Circulation

Right/left coronary arteries, LAD, circumflex, RCA, cardiac veins and coronary sinus.

05

Conduction System

SA node → AV node → His-Purkinje network, delays, depolarization and rhythm.

06

Cardiac Cycle

Filling, isovolumetric phases, ejection, pressure changes and valve events.

07

ECG Foundations

P wave, PR interval, QRS, ST segment and T wave mapped to cardiac events.

08

Hemodynamics

CO, SV, preload, afterload, resistance, MAP and capillary exchange.

SYSTEM MODULE

Respiratory System

Air movement, conducting pathways, alveoli, pressure mechanics, gas exchange, transport, and acid–base integration.

Deep Build v1.2
ANATOMY20tracked structures
PHYSIOLOGY9major mechanisms
PATHWAYS4air + gas sequences
INTEGRATION3cardiopulmonary links
01

Airway Anatomy

Nose, pharynx, larynx, trachea, bronchi, bronchioles and alveoli.

02

Ventilation Mechanics

Pressure gradients, diaphragm movement, thoracic volume and airflow.

03

Alveolar Gas Exchange

Partial pressures, diffusion gradients, alveolar-capillary membrane.

04

Oxygen Transport

Hemoglobin binding, saturation, dissolved oxygen and delivery.

05

CO₂ Transport

Bicarbonate formation, carbaminohemoglobin and dissolved CO₂.

06

Ventilation–Perfusion

Match alveolar ventilation to pulmonary blood flow.

07

Acid–Base Link

CO₂, carbonic acid, bicarbonate and respiratory compensation.

08

Clinical Integration

Asthma, COPD, diffusion impairment, hypoventilation and V/Q mismatch.

AIR PATHWAY

Trace inhaled air

VENTILATION LAB

How pressure moves air

Change thoracic volume and watch intrapulmonary pressure drive airflow.

Pressure Mechanics
INPUT

Thoracic Expansion

OUTPUT

Ventilation response

Intrapulmonary Pressure0 cm H₂Orelative to atmosphere
Airflow DirectionNo net flowair follows a pressure gradient
Ventilation EfficiencyBalancedresistance + recoil influence flow
MECHANISM

Boyle's law logic

Thoracic volume ↑ → intrapulmonary pressure ↓ → air moves in
Thoracic volume ↓ → intrapulmonary pressure ↑ → air moves out
Airway resistance ↑ → airflow decreases for the same pressure gradient
BREATHING CYCLE

Inspiration vs expiration

Quiet inspirationDiaphragm contracts → thoracic volume increases
Quiet expirationDiaphragm relaxes → elastic recoil reduces thoracic volume
Air enters whenAlveolar pressure < atmospheric pressure
Air exits whenAlveolar pressure > atmospheric pressure
GAS EXCHANGE LAB

Diffusion, transport, and V/Q matching

Connect partial-pressure gradients to oxygen delivery, carbon dioxide removal, and acid–base balance.

Integrated Respiratory Physiology
ALVEOLUS ↔ CAPILLARY

Partial pressure simulator

RESULT

Oxygen diffusion signal

PO₂ Gradient60 mmHgalveolus → blood
Relative O₂ TransferHighgradient × membrane efficiency
Clinical SignalEfficient exchangesimplified educational model
OXYGEN TRANSPORT

Hemoglobin is the major carrier

1. O₂ diffuses from alveoli into pulmonary capillary blood. 2. Most O₂ binds reversibly to hemoglobin. 3. Oxygenated blood returns to the left heart. 4. Systemic perfusion delivers O₂ to tissues.
CO₂ + ACID–BASE

Respiration helps regulate pH

CO₂ + H₂O ⇌ H₂CO₃ ⇌ H⁺ + HCO₃⁻ Ventilation ↑ → CO₂ removed faster → tendency toward higher pH. Ventilation ↓ → CO₂ retained → tendency toward lower pH.
V/Q MATCHING

Ventilation must meet perfusion

STRUCTURE EXPLORER

Heart Anatomy

Select a structure to examine its anatomy, function, relationships, and clinical significance.

HEART
PATHWAY EXPLORER

Blood Flow Through the Heart

Trace each step. The system explains what happens and why each transition occurs.

Interactive Sequence
ACTIVE RECALL

Rebuild the pathway

Click the structures in the correct order. Your sequence is checked against the physiologic pathway.

CONDUCTION LAB

Electrical Activation of the Heart

Follow the impulse, connect it to the ECG, and see how electrical timing drives mechanical contraction.

Electrophysiology
IMPULSE PATH

Cardiac conduction sequence

START HERE

SA Node

The sinoatrial node initiates spontaneous depolarization and normally sets the pace of the heart.

ECG FOUNDATIONS

Electrical event → waveform → mechanical meaning

╲__╱╲_______╱╲╱╲___╲____╱╲_______
CARDIAC CYCLE LAB

Pressure, volume, valves, and heart sounds

Move phase by phase and connect mechanical events to electrical activation.

Mechanics
PRESSURE LOGIC

Why valves open and close

AV valves open whenAtrial pressure > Ventricular pressure
AV valves close whenVentricular pressure > Atrial pressure
Semilunar valves open whenVentricular pressure > Arterial pressure
Semilunar valves close whenArterial pressure > Ventricular pressure
HEMODYNAMICS LAB

Cardiac output and pressure mechanics

Adjust physiologic variables and watch the downstream effect on circulation.

Interactive Physiology
INPUTS

Circulatory variables

OUTPUTS

Calculated physiology

Cardiac Output5.0 L/minHR × SV
Relative MAP TrendNormalCO × vascular resistance
Workload SignalBalancedPressure + volume demand
PHYSIOLOGY

Core relationships

CO = HR × SV
MAP ∝ CO × SVR
SV influenced by preload + contractility − afterload
HISTOLOGY LAB

Cardiac Muscle Tissue

Connect microscopic structure to the mechanics of the heart.

SELECT A HOTSPOT

Microscopic anatomy

Use the numbered hotspots to inspect hallmark features of cardiac muscle tissue.

CLINICAL CORRELATIONS

From normal physiology to dysfunction

Reason through what changes, what follows, and why findings appear.

PRACTICE LAB

Adaptive Cardiovascular Practice

Mixed identification, sequencing, anatomy, and physiology questions.

10-question bank
EXAM CENTER

Assessment Modes

Move from low-stakes recall to cumulative practical examinations.

15

Quick Check

15 questions · Untimed · Immediate feedback

30

Module Exam

30 questions · anatomy + physiology + clinical integration

P

Practical Exam

Structure ID · Histology · Pathways · ECG · Cardiac cycle

Σ

Cumulative Exam

Unlocks as additional systems are completed.

MASTERY MAP

Concept-level performance

Track what is mastered, developing, weak, or not yet studied.

STUDY CENTER

Notes + Flashcards

Keep your own explanations next to the anatomy you are learning.

NOTES

Cardiovascular Notebook

Auto-saves locally
FLASHCARDS

Rapid Recall

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