Module 2: Medical Terminology and Anatomy/Physiology

By the end of this module, you will be able to:

• Master the basics of medical terminology, including prefixes, suffixes, and root words.

• Understand human anatomy and physiology at a detailed level, focusing on major body systems.

• Apply medical terms accurately in assessments and documentation.

• Recognize the interrelationships between different body systems.

Understanding Medical Terms

Medical terminology is the language used by healthcare professionals. It allows precise communication and documentation.

Components of Medical Terms

• Root Words: The main part of the word that contains the fundamental meaning.

  • Examples:

    • Cardi: Heart

    • Neuro: Nerve

    • Gastro: Stomach

• Prefixes: Added to the beginning of root words to modify meaning.

  • Examples:

    • Brady- : Slow (ex., Bradycardia - slow heart rate)

    • Tachy- : Fast (ex., Tachypnea - rapid breathing)

    • Hyper- : Above normal (ex., Hypertension - high blood pressure)

    • Hypo- : Below normal (ex., Hypotension - low blood pressure)

• Suffixes: Added to the end of root words.

  • Examples:

    • -itis: Inflammation (ex., Appendicitis - inflammation of the appendix)

    • -ology: Study of (ex., Cardiology - study of the heart)

    • -ectomy: Surgical removal (ex., Tonsillectomy - removal of tonsils)

Combining Forms

• Combining Vowels: Usually 'o' to connect root words and suffixes/prefixes for easier pronunciation.

  • Example: Gastroenterology (Gastro + enter + ology)

Common Medical Terms

• Dyspnea: Difficulty breathing

• Hypoxia: Low oxygen levels

• Edema: Swelling due to fluid accumulation

Practice Exercise

• Break down the term "Hemodynamic" :

  • Hemo (blood) + dynamic (force or power) = Relating to the flow of blood within the organs and tissues.

Anatomical Position and Directional Terms

• Anatomical Position: Standing upright, facing forward, arms at the sides, palms forward.

• Directional Terms:

  • Anterior (ventral) : Front of the body

  • Posterior (dorsal) : Back of the body

  • Superior: Toward the head

  • Inferior: Toward the feet

  • Medial: Toward the midline

  • Lateral: Away from the midline

  • Proximal: Closer to the point of attachment

  • Distal: Farther from the point of attachment

  • Superficial: Near the surface

  • Deep: Away from the surface

Body Planes

• Sagittal Plane: Divides the body into left and right sections

• Coronal (Frontal) Plane: Divides the body into anterior and posterior sections

• Transverse Plane: Divides the body into superior and inferior sections

Major Body Cavities

• Cranial Cavity: Contains the brain

• Spinal Cavity: Contains the spinal cord

• Thoracic Cavity: Contains the heart and lungs

• Abdominal Cavity: Contains digestive organs

• Pelvic Cavity: Contains reproductive organs

Body Systems

1. Skeletal System

• • Function: Provides structure, protects organs, facilitates movement, produces blood cells.

  • Key Components:

    • Bones: Over 200 individual bones.

    • Joints: Where bones meet.

    • Cartilage: Cushions joints.

2. Muscular System

• • Function: Movement, posture maintenance, heat production.

  • Types of Muscle:

    • Skeletal Muscle: Voluntary movement.

    • Smooth Muscle: Involuntary, found in organs.

    • Cardiac Muscle: Heart muscle.

3. Circulatory System

• • Function: Transports oxygen, nutrients, and waste.

  • Components:

    • Heart: Pumps blood.

    • Blood Vessels: Arteries, veins, capillaries.

    • Blood: Contains cells (red, white) and plasma.

4. Respiratory System

• • Function: Gas exchange (oxygen in, carbon dioxide out).

  • Components:

    • Upper Airway: Nose, mouth, pharynx, larynx.

    • Lower Airway: Trachea, bronchi, lungs, alveoli.

  • Physiology:

    • Ventilation: Movement of air.

    • Diffusion: Gas exchange at alveolar level.

5. Nervous System

• • Function: Controls body functions, sensory information processing.

  • Components:

    • Central Nervous System (CNS) : Brain and spinal cord.

    • Peripheral Nervous System (PNS) : Nerves extending from CNS.

6. Digestive System

• • Function: Breaks down food for nutrient absorption.

  • Components:

    • Mouth, Esophagus, Stomach

    • Small and Large Intestines

    • Accessory Organs: Liver, pancreas, gallbladder.

7. Integumentary System

• • Function: Protects body, regulates temperature, sensory reception.

  • Components:

    • Skin: Layers include epidermis, dermis.

    • Hair and Nails

8. Endocrine System

• • Function: Hormone production and regulation.

  • Glands: Thyroid, adrenal, pancreas.

9. Urinary System

• • Function: Removes waste, regulates fluid balance.

  • Components:

    • Kidneys, Ureters, Bladder, Urethra

10. Reproductive System

• • Function: Produces offspring.

  • Male and Female Reproductive Organs

Physiological Concepts

• Homeostasis: The body's ability to maintain a stable internal environment.

• Metabolism: Chemical reactions within the body cells.

• Fluid and Electrolyte Balance

Using Medical Terminology

• Communication: Precise terms avoid misunderstandings.

• Documentation: Accurate records are critical for continuity of care.

Anatomy in Patient Assessment

• Identifying Injury Locations: Using directional terms.

• Understanding Pathophysiology: How diseases affect body functions.

Case Studies

• Scenario Analysis: Apply knowledge in simulated EMS calls.

Additional Resources

• Khan Academy Anatomy and Physiology Course: Khan Academy A&P

• "Anatomy & Physiology" Textbook by OpenStax.