Laboratory Activities and Assignment: Human Anatomy and Organ Systems

Human Organ Systems and Classification

• The 11 Human Organ Systems: The following abbreviations are used to categorize organs and structures within the human body according to their primary system functionality:

  • Cardiovascular (C): Responsible for the transport of blood, nutrients, and waste.
  • Urinary (U): Responsible for waste excretion and fluid balance.
  • Reproductive Male (MR) and Female (FR): Responsible for the production of gametes and offspring.
  • Endocrine (E): Responsible for hormone production and long-term regulation.
  • Muscular (M): Responsible for movement and heat production.
  • Skeletal (S): Provides structural support and protection.
  • Nervous (N): Coordinates high-speed communication and control.
  • Integumentary (I): Provides protection, temperature regulation, and sensory input.
  • Respiratory (R): Facilitates gas exchange ($O_2$ and $CO_2$).
  • Lymphatic (L): Manages fluid balance and immune responses.
  • Digestive (D): Processes food and absorbs nutrients.

• Detailed Classification of Organs and Structures:

  • Adrenal glands: Endocrine (E).
  • Artery: Cardiovascular (C).
  • Blood: Cardiovascular (C).
  • Brain: Nervous (N).
  • Capillaries: Cardiovascular (C).
  • Cartilage: Skeletal (S).
  • Epididymis: Reproductive Male (MR).
  • Esophagus: Digestive (D).
  • Fingernails: Integumentary (I).
  • Gall bladder: Digestive (D).
  • Hair: Integumentary (I).
  • Heart: Cardiovascular (C).
  • Joints: Skeletal (S).
  • Kidney: Urinary (U).
  • Kneecap: Skeletal (S).
  • Large intestines: Digestive (D).
  • Liver: Digestive (D).
  • Lungs: Respiratory (R).
  • Lymph nodes: Lymphatic (L).
  • Lymphatic vessels: Lymphatic (L).
  • Mammary glands: Reproductive Female (FR) and Integumentary (I).
  • Muscles: Muscular (M).
  • Nasal cavity: Respiratory (R).
  • Nerves: Nervous (N).
  • Ovary: Reproductive Female (FR) and Endocrine (E).
  • Pancreas: Digestive (D) and Endocrine (E).
  • Pituitary gland: Endocrine (E).
  • Ribs: Skeletal (S).
  • Sense organs (e.g., eye): Nervous (N).
  • Skin: Integumentary (I).
  • Skull: Skeletal (S).
  • Small intestines: Digestive (D).
  • Spinal cord: Nervous (N).
  • Spleen: Lymphatic (L).
  • Stomach: Digestive (D).
  • Tendons: Muscular (M).
  • Testes: Reproductive Male (MR) and Endocrine (E).
  • Thymus: Lymphatic (L) and Endocrine (E).
  • Thyroid gland: Endocrine (E).
  • Trachea: Respiratory (R).
  • Urinary bladder: Urinary (U).
  • Uterus: Reproductive Female (FR).

Anatomical Position and Directional Terms

• Standard Anatomical Position Definitions: Directional terms describe the relative position of one body part to another.

  • Heart and Lungs: The heart is medial (toward the midline) to the lungs.
  • Knee and Hip: The knee is distal (farther from the point of attachment/trunk) to the hip.
  • Wrist and Hand: The wrist is proximal (closer to the point of attachment) to the hand.
  • Mouth and Nose: The mouth is inferior (below) to the nose.
  • Thorax and Abdomen: The thorax is superior (above) to the abdomen.
  • Thumb and Ring Finger: The thumb is lateral (farther from the midline) to the ring finger.
  • Sternum and Heart: The sternum is anterior / ventral (in front of) the heart.
  • Skull and Scalp: The skull is deep (farther from the surface) to the scalp.
  • Ears and Nose: The ears are lateral (farther from the midline) to the nose.
  • Dorsal vs. Ventral: Dorsal refers to the back (posterior) of the human body, while ventral refers to the front (anterior) of the human body.

• Spatial orientation of the Auditory System (Incus):

  • The incus (an ossicle in the middle ear) is positioned superior (above) and lateral (to the side) relative to the cochlear nerve.
  • The incus is medial (closer to the midline) relative to the malleus.
  • The incus is lateral (farther from the midline) relative to the stapes.

Planes and Sections of the Human Body

• Types of Brain Sections: Slicing the brain through different planes yields different views:

  • Coronal (Frontal) Section: Divides the brain into anterior and posterior parts.
  • Sagittal Section: Divides the brain into right and left parts.
  • Transverse (Axial/Horizontal) Section: Divides the brain into superior and inferior parts.

• General Body Planes Definitions:

  • Frontal (Coronal) Plane: A vertical plane that divides the body or an organ into anterior (front) and posterior (back) parts.
  • Transverse Plane: A horizontal plane that divides the body into superior (upper) and inferior (lower) regions.
  • Sagittal (or Midsagittal/Parasagittal) Plane: A vertical plane that divides the body into right and left parts.

Anatomical Adjectives for Body Locations

• Regional Terms (A-Z):
  • Abdominal: Region of the abdomen.
  • Acromial: Point of the shoulder.
  • Antebrachial: Forearm.
  • Antecubital: Front of the elbow.
  • Axillary: Armpit.
  • Brachial: Arm (upper portion).
  • Buccal: Cheek.
  • Calcaneal: Heel of the foot.
  • Carpal: Wrist.
  • Cephalic: Head.
  • Cervical: Neck.
  • Clavicular: Collarbone.
  • Coxal: Hip.
  • Cranial: Skull.
  • Crural: Leg (lower portion).
  • Cubital: Elbow.
  • Digital: Fingers or toes.
  • Dorsal: Back.
  • Facial: Face.
  • Femoral: Thigh.
  • Frontal: Forehead.
  • Genital: Reproductive organs.
  • Glossal: Tongue.
  • Gluteal: Buttock.
  • Hallux: Great toe (big toe).
  • Inguinal: Groin.
  • Lumbar: Lower back.
  • Mammary: Breast.
  • Manual: Hand.
  • Mental: Chin.
  • Nasal: Nose.
  • Ocular / Orbital: Eye.
  • Olecranal: Back of the elbow.
  • Oral: Mouth.
  • Otic: Ear.
  • Palmar: Palm of the hand.
  • Patellar: Knee cap (front).
  • Pectoral: Chest.
  • Pedal: Foot.
  • Pelvic: Pelvis.
  • Perineal: Region between the anus and external genitalia.
  • Pollex: Thumb.
  • Popliteal: Back of the knee.
  • Pubic: Genital region.
  • Sacral: Between the hips (posterior).
  • Scapular: Shoulder blade.
  • Sternal: Breastbone.
  • Sural: Calf.
  • Tarsal: Ankle.
  • Thoracic: Chest / thorax.
  • Trunk: Torso.
  • Umbilical: Navel.
  • Vertebral: Spinal column.

Abdominopelvic Regions and Quadrants

• The Four Abdominopelvic Quadrants: Used primarily by clinicians for localized pain or abnormalities:

  1. Right Upper Quadrant (RUQ).
  2. Left Upper Quadrant (LUQ).
  3. Right Lower Quadrant (RLQ).
  4. Left Lower Quadrant (LLQ).

• The Nine Abdominopelvic Regions: Used for more detail in anatomical studies:

  1. Right Hypochondriac Region: Upper right section.
  2. Epigastric Region: Upper center section.
  3. Left Hypochondriac Region: Upper left section.
  4. Right Lumbar (Lateral) Region: Middle right section.
  5. Umbilical Region: Center section containing the navel.
  6. Left Lumbar (Lateral) Region: Middle left section.
  7. Right Iliac (Inguinal) Region: Lower right section.
  8. Hypogastric (Pubic) Region: Lower center section.
  9. Left Iliac (Inguinal) Region: Lower left section.

Body Cavities and Serosa

• Primary Cavities and Locations:

  • The two main body cavities are the dorsal (posterior) and the ventral (anterior) cavities.
  • The stomach is located within the abdominal (or abdominopelvic) cavity.
  • The heart is located within the pericardial cavity, which is found within the larger thoracic (ventral) cavity.
  • The brain is located within the cranial cavity, which is part of the larger dorsal cavity.
  • The urinary bladder and reproductive organs are located within the pelvic cavity.

• Serous Membranes (Serosa): Serous membranes are double-layered membranes that line closed body cavities and cover organs.

  • Parietal Layer: Lines the wall of the body cavity.
  • Visceral Layer: Directly covers the surface of the organ.
  • Types of Serosa:
    • Pericardium: Surrounds the heart.
    • Pleura: Surrounds the lungs.
    • Peritoneum: Surrounds organs within the abdominopelvic cavity.