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Anatomy
Basics
Terminology Introduction to the musculoskeletal system Introduction to the other systems
Upper limb
Overview Shoulder and arm Elbow and forearm Wrist and hand Nerves and vessels
Lower limb
Overview Hip and thigh Knee and leg Ankle and foot Nerves and vessels
Spine and back
Overview Spine Back
Thorax
Thoracic wall Female breast Mediastinum Lungs Heart
Abdomen
Abdominal wall Peritoneum Stomach Spleen Liver Pancreas Small intestine Large intestine Kidneys and ureters Nerves, vessels and lymphatics of the abdomen
Pelvis and perineum
Pelvic girdle and floor Female pelvis and reproductive organs Male pelvis and reproductive organs Urinary bladder and urethra Perineum Nerves, vessels and lymphatics of the pelvis
Head and neck
Overview Skull Face and scalp Infratemporal region and pterygopalatine fossa Orbit and contents Nasal region Ear Oral cavity Teeth Pharynx Neck
Neuroanatomy
Overview Cerebrum Diencephalon Cerebellum Brainstem Meninges, ventricular system and subarachnoid space Blood supply of the brain Spinal cord Pathways of the nervous system Cranial nerves Peripheral nervous system
Cross sections
Head and neck Upper limb Thorax Abdomen Male pelvis Female pelvis Lower limb
Radiological anatomy
Head and neck Thorax Abdomen and pelvis Upper limb Lower limb
Histology
Types of tissues
Introduction to cells and tissues Epithelial tissue Connective tissue Cartilage and bone Muscle tissue Nervous tissue
Body systems
Cardiovascular system Nervous system Integumentary system Respiratory system Urinary system Endocrine system Digestive system Lymphoid system Male reproductive system Female reproductive system Eye and ear
AnatomyBasicsTerminologyInternal
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AnatomyBasicsTerminologyInternal

Internal

Author: Sara Ferreira, MD • Reviewer: Dimitrios Mytilinaios, MD, PhD
Last reviewed: October 30, 2023
Reading time: 1 minute

Recommended video: Directional terms and body planes [10:35]
Locating structures in your body is one of the main components of anatomy. Learn all terms used to describe location in the human body.
Internal
Internus
1/3
Synonyms: none

Internal is a directional term that means inside or closer to the centre of an organ or cavity.

The opposite of internal is external which means outside of or farther from the centre of an organ or cavity.

For example, the organs of the abdominal cavity are internal to the muscles of the abdominal wall and vice versa.

Terminology English: Internal
Latin: Internus
Examples External ear, internal ear, external iliac artery, internal iliac artery

Learn all the anatomical terms and planes with the following study unit.

Sources

All content published on Kenhub is reviewed by medical and anatomy experts. The information we provide is grounded on academic literature and peer-reviewed research. Kenhub does not provide medical advice. You can learn more about our content creation and review standards by reading our content quality guidelines.

Moore, K. L., Dalley, A. F., & Agur, A. (2017). Clinically oriented anatomy (8th ed.). Lippincott Williams and Wilkins.

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