Embryology

Overview

Embryology explores how the embryo develops from a single cell into complex tissues and organ systems. This section introduces the key stages of early development and outlines how different regions of the body arise during gestation. Understanding these processes provides essential context for anatomical structure, congenital variation and clinical examination.

Core Concepts

Topics include the earliest stages of development (weeks 1–3), along with the formation of dermatomes, myotomes and limb buds. Further pages describe the embryological origins of major systems including the head and neck, cardiovascular, respiratory, reproductive, urinary and central nervous systems. Each topic explains the key developmental processes that shape adult anatomy.

Clinical Relevance and Learning Focus

Embryology underpins the understanding of congenital anomalies, developmental disorders and anatomical variation. Knowledge of developmental pathways supports interpretation of clinical imaging, paediatric assessment and system-based pathology. This section helps learners connect embryological events with the structure and function of the mature body.

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Embryology: Weeks 1-3

Dermatomes

Myotomes

The Limbs

The Head and Neck

  • The Pituitary, Tongue and Thyroid
  • The Face and Palate
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The Cardiovascular System

The Respiratory System

The Urinary System

The Reproductive System

The Central Nervous System

Popular

Diagram of the muscles of the posterior abdominal wall, including Psoas Minor, Psoas Major, and Iliacus.
Encyclopaedia

Psoas Minor

by Aren Mnatzakanian

Diagram illustrating the course of the supratrochlear nerve within the bony orbit.
Encyclopaedia

Supratrochlear Nerve

by Dieudonne Nabayo

Illustration of the deltoid and teres major muscles, highlighting their anatomical structure and relation to the circumflex scapular artery.
Encyclopaedia

Teres Major

by Dr Oliver Jones