Human Anatomy and Physiology Laboratory I: Comprehensive Study Notes

BIOL 2401: Human Anatomy and Physiology Laboratory I Notes

Course Information and Structure

Instructor: Dr. Joseph Reeve (reevej@wcjc.edu)
Office Locations:
- Sugar Land: SUGUH 214A
- Richmond: FBTC 240
Office Hours: To Be Announced (TBA)
Communication Policy: Before emailing, students are required to check the syllabus, their notes, their textbook, and consult with study partners.

Required Materials

Lab Workbook: Study Guide for Understanding Anatomy and Physiology; 4th Edition; F.A. Davis by Gale Sloan Thompson.

Laboratory Schedule: Fall 2025

This schedule outlines weekly topics, associated workbook pages, and handout pages.

Week 1 (August 25)
- Topic: Orientation, Lab Safety, Microscope, & Language of Anatomy (Directional Terms, Planes, Membranes, Abdominopelvic Quadrants & Regions)
- Related Workbook Pages: $3, 5-9, 53$
- Handout Pages: $1-3$
Week 2 (September 1)
- Topic: Cell, Tissues, & Integumentary System
- Note: Labor Day Holiday on September 1st
- Related Workbook Pages: $23, 43, 45-46, 55$
- Handout Pages: $4-6$
Week 3 (September 8)
- Topic: Quiz 1; Skeletal System - Histology & Axial Skeleton
- Related Workbook Pages: $65, 67, 77, 80, 82-84, 86$
- Handout Pages: $7-10$
Week 4 (September 15)
- Topic: Quiz 2; Skeletal System - continued
- Related Workbook Pages: $65, 67, 77, 80, 82-84, 86$
- Handout Pages: $7-10$
Week 5 (September 22)
- Topic: Lab Practical #1
- Note: Includes all previous lab topics from Handout Pages $1-10$
Week 6 (September 29)
- Topic: Skeletal System - Appendicular Skeleton
- Related Workbook Pages: $87-93$
- Handout Pages: $10-12$
Week 7 (October 6)
- Topic: Quiz 3; Muscular System - Histology & Identification of Major Skeletal Muscles (includes origin, insertion, & action)
- Related Workbook Pages: $104, 106, 114-121$
- Handout Pages: $13-18$
Week 8 (October 12)
- Topic: Quiz 4; Muscular System - continued
- Related Workbook Pages: $101, 106, 111-121$
- Handout Pages: $12-19$

Course Overview and Learning Objectives (Start Here - Lab 1)

This initial lab serves to:

Introduce the policies and procedures specific to this laboratory course.
Familiarize students with anatomical and directional terms critical for describing the human body.
Enable identification of major organs located within the dorsal and ventral body cavities.
Provide instruction on the proper use of the microscope.

I. Orientation

Discussion of the lab syllabus and schedule.
Explanation of course expectations and testing procedures.

II. The Microscope

Identification of all parts of a compound microscope and their respective functions.
Demonstration of correct microscope operation.
Methodology for determining total magnification of a viewed specimen.

III. The Language of Anatomy

Definition and description of the anatomical position.
Description of directional terms, anatomical terms/regions (using models), and body planes (using models).
Identification of major body cavities (using models).

Assessment Structure

Lab Practical Exams ( $3$ total): Account for $75\%$ of the final grade.
Lab Quizzes ( $6$ total, with $1$ lowest score dropped): Account for $25\%$ of the final grade.
Note: No extra credit opportunities will be provided.

Microscope Parts and Their Functions

Eyepiece (Ocular Lens):
- Function: The component one looks through to make observations. It magnifies the image by a factor of $10 imes$ .
Rotating Nosepiece:
- Function: Allows for the rotation and positioning of different objective lenses.
Objective Lenses:
- Function: These include scanning, low-power, and high-power lenses. They magnify the image of an object as they project light upwards into the body tube.
Mechanical Stage:
- Function: A platform designed to hold the microscope slide securely.
Slide Holder Finger; Stage Clips:
- Function: Mechanisms used to firmly secure the microscope slide onto the mechanical stage.
Condenser:
- Function: Concentrates and focuses the amount of light emitted by the illuminator onto the microscope slide.
Iris Diaphragm Lever:
- Function: Opens and closes the diaphragm, thereby adjusting the intensity of light entering the condenser. This mechanism provides control over the image contrast.
Substage Illuminator (Lamp):
- Function: The light source that directs light into the condenser, through the objective lens, and ultimately to the eyepiece.
Illuminator Switch:
- Function: Controls the power to the light bulb, turning it on or off.
Base:
- Function: The sturdy foundation upon which the microscope rests. It supports the entire instrument and is a primary point for carrying the microscope.
Body and Body Tube:
- Function: Located between the eyepiece and the rotating nosepiece, these structures provide support and a clear path for light transmission.
Arm:
- Function: The vertical component connecting the base and the body of the microscope. It is also used as a handle for carrying the microscope.
Coarse Adjustment Knob:
- Function: Used for initial focusing of the image primarily under scanning or low-power objectives.
Fine Adjustment Knob:
- Function: Used for precise, fine-tuning of the image focus, especially when observing under high-power objectives.

Microscope Lenses and Total Magnification

Total magnification is calculated by multiplying the objective lens magnification by the eyepiece lens magnification.

Scanning Lens:
- Common Objective Lens Magnification: $4 imes$
- Common Eyepiece Lens Magnification: $10 imes$
- Total Magnification: $40 imes$
Low-power (LP) Lens:
- Common Objective Lens Magnification: $10 imes$
- Common Eyepiece Lens Magnification: $10 imes$
- Total Magnification: $100 imes$
High-power (HP) Lens:
- Common Objective Lens Magnification: $40 imes$
- Common Eyepiece Lens Magnification: $10 imes$
- Total Magnification: $400 imes$
Oil Immersion Lens:
- Common Objective Lens Magnification: $100 imes$
- Common Eyepiece Lens Magnification: $10 imes$
- Total Magnification: $1,000 imes$
Important Note for Observation: When preparing to observe an object under low-power, high-power, or oil immersion objectives, it is crucial to first locate, center, and bring the object into focus using the scanning magnification.

Language of Anatomy

Anatomical Position

This is the standard reference position for anatomical descriptions:

Body is erect.
Feet are slightly apart.
Palms of the hands are facing forward.
Eyes are gazing forward.
Arms are straight and down at the sides.
Fingers are extended.
Feet are flat with toes pointing forward.

Body Axes

Axial: Pertains to the long axis of the body, including the head, neck, and trunk.
Appendicular: Refers to the limbs (upper and lower extremities) attached to the axial skeleton.

Anterior Body Landmarks (Anterior View)

These terms describe regions on the front of the body:

Cephalic (head region):
- Cranial (skull)
- Facial (face)
- Orbital (eye socket)
- Otic (ear)
- Nasal (nose)
- Buccal (cheek)
- Oral (mouth)
- Mental (chin)
Cervical (neck)
Thoracic (chest region):
- Sternal (breast bone)
- Axillary (underarm)
- Mammary (breast)
Abdominal (abdomen)
Pelvic (pelvis)
Inguinal (groin)
Pubic (genitals)
Upper Extremity:
- Brachial (arm)
- Antecubital (front of elbow)
- Antebrachial (forearm)
- Carpal (wrist)
- Palmar (palm)
- Digits or Phalanges (fingers)
Lower Extremity:
- Coxal (hip)
- Femoral (thigh)
- Patellar (kneecap)
- Crural (leg)
- Tarsal (ankle)
- Digits or Phalanges (toes)
- Pedal (foot)

Posterior Body Landmarks (Posterior View)

These terms describe regions on the back of the body:

Occipital (base of skull)
Acromial (shoulder)
Scapular (shoulder blade)
Vertebral (back bone)
Dorsum (back, general)
Olecranal (back of elbow)
Lumbar (low back)
Sacral (between hips)
Gluteal (buttocks)
Upper Extremity:
- Manus (hand)
- Phalanges (fingers)
Lower Extremity:
- Femoral (thigh)
- Popliteal (back of knee)
- Sural (calf)
- Plantar (sole of foot)
- Calcaneal (heel)

Body Orientation and Directional Terms

Superior (Cranial): Above, toward the top or head.
Inferior (Caudal): Below, toward the bottom or tail.
Medial: Toward the midline of the body.
Lateral: Away from the midline of the body.
Anterior (Ventral): Toward the front side or belly side of the body.
Posterior (Dorsal): Toward the back side or vertebral side of the body.
Proximal: Nearer to the trunk (for a limb) or closer to the point of origin (for an organ).
Distal: Further from the trunk (for a limb) or further from the point of origin (for an organ).

Body Planes

Body planes are imaginary flat surfaces that pass through the body, dividing it into sections.

Coronal (Frontal) Plane:
- Divides the body vertically into anterior (front) and posterior (back) parts.
Transverse (Horizontal) Plane:
- Divides the body horizontally into superior (upper) and inferior (lower) parts.
- Produces a cross section.
Midsagittal (Median) Plane:
- Divides the body vertically exactly in the midline into equal right and left parts.
Parasagittal Plane:
- A sagittal plane that divides the body vertically into unequal right and left parts (not along the midline).
Oblique Plane:
- A plane cut at an angle, not perpendicular or parallel to the sagittal, coronal, or transverse planes.

Body Cavities

Body cavities are spaces within the body that contain and protect internal organs (viscera).

I. Dorsal Cavity

Function: Primarily protects the delicate nervous system.
Subdivisions:
- Cranial Cavity:
  - Contents: Encases the brain.
  - Protection: Protected by the meninges.
- Spinal Cavity (Vertebral Cavity):
  - Contents: Contains the spinal cord.
  - Protection: Protected by the meninges.

II. Ventral Cavity

Function: Houses the internal organs (viscera).
Diaphragm: A large, dome-shaped muscle that separates the thoracic cavity from the abdominopelvic cavity.
Subdivisions:
- Thoracic Cavity:
  - Pleural Cavities: Each pleural cavity contains one lung, encased by serous membranes called pleura.
  - Pericardial Cavity: Located within the mediastinum. Contains the heart, encased by the pericardium.
  - Mediastinum: The central compartment of the thoracic cavity. It contains all organs between the lungs, including the heart, great vessels, esophagus, and trachea.
- Abdominopelvic Cavity:
  - Abdominal Cavity:
    - Contents: Primarily contains digestive organs (e.g., stomach, spleen, liver, gallbladder, small and large intestines).
    - Protection: Encased by the peritoneum.
  - Pelvic Cavity:
    - Contents: Contains the urinary bladder and reproductive organs (e.g., uterus, ovaries, prostate, rectum).
    - Protection: Also encased by the peritoneum.

Divisions of the Abdominopelvic Region

For more precise anatomical localization, the abdominopelvic cavity can be divided into regions or quadrants.

Abdominopelvic Regions (Nine Regions):
1. Right Hypochondriac Region
2. Epigastric Region
3. Left Hypochondriac Region
4. Right Lumbar Region
5. Umbilical Region
6. Left Lumbar Region
7. Right Iliac (Inguinal) Region
8. Hypogastric (Pubic) Region
9. Left Iliac (Inguinal) Region
Abdominopelvic Quadrants (Four Quadrants):
1. Right Upper Quadrant (RUQ)
2. Left Upper Quadrant (LUQ)
3. Right Lower Quadrant (RLQ)
4. Left Lower Quadrant (LLQ)

Serous Membranes of the Ventral Body Cavity

These are thin, double-layered membranes that line the walls of the ventral body cavities and cover the organs within them.

Primary Functions:
- Provide lubrication to allow organs to slide past each other without friction.
- Compartmentalize organs, limiting the spread of infection.
Types of Serous Membranes:
- Parietal Layer: The outer layer, which lines the walls of the body cavity.
- Visceral Layer: The inner layer, which covers the surface of the organs within the cavity.
Specific Examples:
- Lungs: Associated with the pleura (parietal pleura lining the thoracic wall and visceral pleura covering the lungs).
- Heart: Associated with the pericardium (fibrous pericardium and serous pericardium - parietal and visceral layers).
- Abdominal Organs: Associated with the peritoneum (parietal peritoneum lining the abdominopelvic wall and visceral peritoneum covering most abdominal organs).