Dr. Najeeb Lectures Courses

Urine Concentration and Dilution - Countercurrent Multiplication

Explains how the kidney concentrates and dilutes urine through medullary osmolarity, countercurrent mechanisms, urea recycling, and ADH.

• YouTube
• 1 hour 58 minutes
• Self-Paced
• Free Video

Respiration - Transport of Carbon Dioxide in Blood & Body Fluids - Part 2

Explains how blood carries carbon dioxide from peripheral tissues to the lungs through bicarbonate, dissolved CO₂, and carbaminohemoglobin.

• YouTube
• 54 minutes
• Self-Paced
• Free Video

Innate Immunity - Complement System - Immunology

A detailed lecture on how complement proteins activate innate immune defenses through classical, alternative, and lectin pathways, including opsonization and membrane attack.

• YouTube
• 2 hours 37 minutes
• Self-Paced
• Free Video

Nephrotic and Nephritic Syndrome - Causes, Symptoms, and Treatment - Nephrology

Compares nephrotic and nephritic syndromes through glomerular injury, clinical triads, and progression from proteinuria or hematuria to renal failure.

• YouTube
• 1 hour 31 minutes
• Self-Paced
• Free Video

Immunology - Helper T Cells CD4+ and B Cells - Lymphocytes

Explains how CD4+ helper T cells coordinate adaptive immune responses through antigen presentation, co-stimulation, cytokines, and B-cell activation.

• YouTube
• 1 hour 28 minutes
• Self-Paced
• Free Video

Hypertension - Blood Pressure Regulation - Hypotension

Explore how cardiac output, vascular resistance, neural pathways, and the renin-angiotensin-aldosterone system regulate blood pressure.

• YouTube
• 2 hours 56 minutes
• Self-Paced
• Free Video

Diuretics - Pharmacology Explained

Explains how diuretics alter nephron transport, electrolyte balance, and urine formation through site-specific drug mechanisms.

• YouTube
• 3 hours 4 minutes
• Self-Paced
• Free Video

Rheumatic Fever & Heart Disease - Pathology

Examines rheumatic fever’s systemic clinical features and cardiac pathophysiology, including pancarditis and progression to rheumatic heart disease.

• YouTube
• 1 hour 2 minutes
• Self-Paced
• Free Video

Cardiac Arrhythmias - Atrial & Ventricular - Tachycardia & Bradycardia

Covers atrial and ventricular arrhythmias through their mechanisms, ECG patterns, and distinctions among tachycardia, bradycardia, flutter, fibrillation, and heart blocks.

• YouTube
• 2 hours 31 minutes
• Self-Paced
• Free Video

Spinothalamic Tract - Ascending Tracts - Spinocerebellar Tract - Neuroanatomy

Trace ascending spinal pathways carrying pain, temperature, touch, and proprioceptive information from peripheral receptors to the brain.

• YouTube
• 3 hours 14 minutes
• Self-Paced
• Free Video

Function of Nephron in Kidney - Regulation of GFR - Renal System Physiology

Explores how the nephron’s multilayered glomerular membrane regulates filtration through charge and size barriers.

• YouTube
• 58 minutes
• Self-Paced
• Free Video

Neuromuscular Junction - Structure, Function & Diseases - Synaptic Cleft

Explains how motor neurons communicate with muscles at the neuromuscular junction, from acetylcholine release and receptor activation to myasthenia gravis.

• YouTube
• 1 hour 32 minutes
• Self-Paced
• Free Video

ECG - Mastering Chest Leads

Learn how precordial chest leads detect cardiac electrical vectors in the horizontal plane, including electrode placement, bony landmarks, artifacts, and myocardial infarction patterns.

• YouTube
• 1 hour 5 minutes
• Self-Paced
• Free Video

Cardiac Cycle - Systole & Diastole - Cardiovascular - Cardiology

A visual explanation of the cardiac cycle, tracing atrial and ventricular contraction, ejection, relaxation, filling, heart sounds, pressures, and ECG timing.

• YouTube
• 1 hour 12 minutes
• Self-Paced
• Free Video

EKG Interpretation - Master Fundamentals of ECG - Electrocardiography

Learn how myocardial electrical activity produces ECG waves, segments, and intervals, from cardiac vectors and electrode placement to normal tracing interpretation.

• YouTube
• 3 hours 1 minute
• Self-Paced
• Free Video