Comprehensive Study Guide to Human Anatomy, Body Systems, and Terminology

Anatomical Position and Terminology

  • Anatomical Position Definition and Criteria:

    • The standard reference posture used in anatomy.
    • Individual is standing straight.
    • Individual is facing forward.
    • Arms are placed at the sides of the body.
    • Palms are facing forward.

  • Patient Reference Frame:

    • Right (R) and Left (L) anatomical terms always use the patient's frame of reference.
    • For example, the patient's right hand corresponds to their own right side, not the hand seen on the right side from the perspective of an observer or practitioner looking at the patient.

Regional Anatomical Terms

  • Anterior Body Regions:

    • Frontal: Forehead
    • Orbital: Eye
    • Nasal: Nose
    • Buccal: Cheek
    • Oral: Mouth
    • Mental: Chin
    • Cervical: Neck
    • Acromial: Shoulder
    • Sternal: Breastbone
    • Axillary: Armpit
    • Thoracic: Chest
    • Mammary: Breast
    • Brachial: Arm
    • Antecubital: Front of elbow
    • Antebrachial: Forearm
    • Carpal: Wrist
    • Pollex: Thumb
    • Palmar: Palm
    • Digital: Fingers or toes
    • Abdominal: Abdomen
    • Umbilical: Navel
    • Pelvic: Pelvis
    • Coxal: Hip
    • Inguinal: Groin
    • Pubic: Genital region
    • Patellar: Anterior knee
    • Tibia: Shin
    • Crural: Leg
    • Fibular / Peroneal: Side of leg
    • Tarsal: Ankle
    • Pedal: Foot
    • Hallux: Great toe

  • Posterior Body Regions:

    • Cephalic: Head
    • Otic: Ear
    • Occipital: Back of head or base of skull
    • Vertebral: Spinal column
    • Scapular: Shoulder blade
    • Brachial: Arm
    • Dorsum or Dorsal: Back
    • Lumbar: Loin
    • Sacral: Between hips
    • Gluteal: Buttock
    • Femoral: Thigh
    • Popliteal: Back of knee
    • Sural: Calf
    • Calcaneal: Heel
    • Plantar: Sole of foot

Directional Terms and Terms of Laterality

  • Directional Terms:

    • Superior (Cephalic / Cranial): Positioned above or toward the head/upper part of a structure.
    • Inferior (Caudal / Plantar): Positioned below or toward the lower part of a structure.
    • Anterior (Ventral): Positioned toward the front of the body.
    • Posterior (Dorsal): Positioned toward the back of the body.
    • Proximal: Nearer to the center of the body or point of attachment.
    • Distal: Farther from the center of the body or point of attachment.
    • Medial: Toward the midline of the body.
    • Lateral: Away from the midline of the body.
    • Superficial: Close to the surface of the body.
    • Deep: Internal; away from the body surface.

  • Terms of Laterality:

    • Unilateral: Pertaining to one side of the body.
    • Bilateral: Pertaining to two (both) sides of the body.
    • Ipsilateral: Located on the same side of the body.
    • Contralateral: Located on the opposite side of the body.

Body Planes and Sections

  • Frontal (Coronal) Plane:

    • Lies vertically.
    • Divides the body into anterior (front) and posterior (back) parts.

  • Transverse Plane:

    • Runs horizontally.
    • Divides the body into superior (upper) and inferior (lower) parts.

  • Sagittal Planes:

    • Lie vertically.
    • Divide the body into right and left sides.

  • Midsagittal Plane:

    • Passes exactly down the middle of the body.
    • Divides the body into equal right and left sides.

  • Oblique Plane:

    • Lies at an angle (diagonal) relative to the horizontal and vertical planes.

Abdominal Quadrants and Regions

  • Abdominal Quadrants and Internal Organs:

    • Upper Left / ULA (Upper Left Abdomen): Contains the Pancreas, Stomach, and Large Intestine.
    • Upper Right / URO (Upper Right Abdomen): Contains the Esophagus, Liver, and Gallbladder.
    • Lower Right / RLA (Lower Right Abdomen): Contains the Appendix, as well as the Large and Small Intestine.
    • Lower Left / LLA (Lower Left Abdomen): Contains the Small and Large Intestine.

  • Nine Abdominal Regions Grid:

    • Top Row: Right Subcostal | Epigastric | Left Subcostal
    • Middle Row: Right Lumbar | Umbilical | Left Lumbar
    • Bottom Row: Right Inguinal | Hypogastric | Left Inguinal

Human Body Systems

  • Skeletal System:

    • Functions: Provides support and protection to the body.
    • Major Structures: Bones, ligaments, cartilage.

  • Nervous System:

    • Functions: Receives, interprets, and responds to messages.
    • Major Structures: Brain, spinal cord, nerves, senses.

  • Cardiovascular System:

    • Functions: Transports materials through the blood to all parts of the body.
    • Major Structures: Blood, heart, veins, arteries.

  • Respiratory System:

    • Functions: Exchanges gases (O2O_2 and CO2CO_2).
    • Major Structures: Lungs, trachea, nose, mouth.

  • Muscular System:

    • Functions: Allows movement and generates heat.
    • Major Structures: Skeletal muscles, Smooth muscles, tendons.

  • Digestive System:

    • Functions: Breaks down and absorbs nutrients.
    • Major Structures: Stomach, intestines, esophagus.

  • Urinary System:

    • Functions: Eliminates liquid waste.
    • Major Structures: Kidneys, bladder, urethra.

  • Integumentary System:

    • Functions: Maintains border, provides protection, and regulates temperature.
    • Major Structures: Skin, nails, hair.

  • Lymphatic / Immune System:

    • Functions: Fights infections and cleanses blood.
    • Major Structures: Lymph, lymph nodes, Spleen, white blood cells.

  • Endocrine System:

    • Functions: Releases hormones to help regulate growth and metabolism.
    • Major Structures: Pituitary gland, thyroid, ovaries, testes.

  • Female Reproductive System:

    • Functions: Produces sex cells and offspring.
    • Major Structures: Ovaries, uterus.

  • Male Reproductive System:

    • Functions: Produces sex cells and offspring.
    • Major Structures: Testes, prostate.