Anatomy, Histology, and Microscope Basics

Vocabulary practice flashcards covering organ systems, microscopy, tissue classification, body planes, cavities, and abdominal regions/quadrants.

Cell

The basic structural and functional unit of life.

Tissue

A group of similar cells performing a common function.

Organ

A structure containing two or more tissue types working together.

Organ System

A group of organs working together to perform complex functions.

Organism

A complete living thing.

Integumentary System

Composed of skin, hair, and nails; functions in protection.

Skeletal System

Composed of bones; provides support and protection.

Muscular System

Functions in movement and heat production.

Nervous System

Functions in rapid communication and control.

Endocrine System

Functions in producing hormones and long-term regulation.

Cardiovascular System

Composed of the heart and blood vessels; functions in transportation.

Lymphatic/Immune System

Functions in fluid return and defense against disease.

Respiratory System

Functions in gas exchange.

Digestive System

Breaks down food and absorbs nutrients.

Urinary System

Removes wastes and regulates fluid and electrolyte balance.

Reproductive System

Produces gametes and supports reproduction.

Ocular Lens

Also known as the eyepiece; commonly provides $10\times$ magnification.

Objective Lenses

Lenses providing different magnifications: scanning ($4\times$), low power ($10\times$), and high power ($40\times$).

Condenser

Microscope component that concentrates light onto the specimen.

Iris Diaphragm

Microscope component that regulates the amount of light reaching the specimen.

Coarse Adjustment Knob

Microscope control that produces large focusing movements; used primarily under low power.

Fine Adjustment Knob

Microscope control that produces precise focusing movements to sharpen the image.

Total Magnification Formula

Calculated as $\text{Ocular magnification} \times \text{Objective magnification}$.

Field of View

The area visible through the microscope; as magnification increases, field of view decreases, detail increases, and the specimen may appear dimmer.

Epithelial Tissue

Primary tissue type that covers surfaces and lines cavities; functions in protection, absorption, secretion, and filtration.

Types of Epithelial Tissues

Classifications of epithelial tissue by cell shape and layer structure, accompanied by specific anatomical examples.

Simple Squamous Epithelium

A single layer of flattened cells; found in the lungs.

Simple Cuboidal Epithelium

A single layer of cube-shaped cells; found in the kidneys.

Simple Columnar Epithelium

A single layer of tall column-like cells; found in the stomach.

Pseudostratified Columnar Epithelium

A single layer of cells appearing layered due to differing cell heights; found in the trachea.

Stratified Squamous Epithelium

Multiple layers of flattened cells; found in the esophagus.

Stratified Cuboidal Epithelium

Multiple layers of cube-shaped cells; found in sweat glands.

Stratified Columnar Epithelium

Multiple layers of tall column-like cells; found in salivary ducts.

Transitional Epithelium

Epithelial tissue adapted to stretch and change shape; found in the bladder.

Connective Tissue

Primary tissue type that supports, binds, protects, and stores; examples include bone, cartilage, blood, and adipose.

Muscle Tissue

Primary tissue type that contracts to produce movement.

Skeletal Muscle

Striated, voluntary muscle tissue usually attached to bones.

Cardiac Muscle

Striated, involuntary muscle tissue found in the heart.

Smooth Muscle

Nonstriated, involuntary muscle tissue found in the walls of hollow organs and blood vessels.

Nervous Tissue

Primary tissue type that conducts electrical signals for communication.

Transverse Plane

Also known as horizontal plane; divides the body into superior (top) and inferior (bottom) portions.

Sagittal Plane

Divides the body into left and right portions.

Frontal Plane

Also known as coronal plane; divides the body into front (anterior) and back (posterior) portions.

Oblique Plane

Cuts the body at an angle.

Dorsal Body Cavity

Posterior body cavity that contains the cranial cavity (brain) and vertebral/spinal cavity (spinal cord).

Thoracic Cavity

Ventral cavity situated above the diaphragm containing the lungs, heart, trachea, esophagus, pleural cavities, pericardial cavity, and mediastinum.

Mediastinum

Central region of the thoracic cavity located between the lungs containing the heart and other structures.

Abdominopelvic Cavity

Ventral cavity located below the diaphragm, divided into the abdominal cavity and pelvic cavity.

Abdominal Cavity

Superior portion of the abdominopelvic cavity containing the stomach, liver, gallbladder, spleen, and most intestines.

Pelvic Cavity

Inferior portion of the abdominopelvic cavity containing the urinary bladder, internal reproductive organs, and rectum.

Abdomen Divisions

Anatomical division of the abdominal area into 4 quadrants (using RLFR) and 9 regions (using SRHLS) for diagnostic and descriptive clarity.

Right Upper Quadrant (RUQ)

Abdominal quadrant containing the liver, gallbladder, small intestine, right kidney, and hepatic flexure.

Left Upper Quadrant (LUQ)

Abdominal quadrant containing the stomach, spleen, pancreas, left kidney, and splenic flexure.

Right Lower Quadrant (RLQ)

Abdominal quadrant containing the appendix, small intestine, and right ovary/fallopian tube.

Left Lower Quadrant (LLQ)

Abdominal quadrant containing the descending colon, small intestine, and left ovary/fallopian tube.

Epigastric Region

Superior middle abdominal region containing the stomach, pancreas, and duodenum.

Umbilical Region

Center abdominal region containing the small intestine and transverse colon.

Hypogastric Region

Inferior middle abdominal region containing the bladder, uterus, and rectum.

Right Hypochondriac Region

Superior right abdominal region containing the liver, gallbladder, and right kidney.

Left Hypochondriac Region

Superior left abdominal region containing the spleen and left kidney.

Right Iliac Region

Inferior right abdominal region containing the appendix and cecum.

Left Iliac Region

Inferior left abdominal region containing the sigmoid colon and left ovary.