Organ Systems Interaction & Regulation

Comprehensive vocabulary flashcards covering the organization, structure, interactions, and regulation of plant and animal organ systems, including clinical injury cases and homeostatic control mechanisms.

Cell

The basic structural and functional unit of biological organization that builds into tissues.

Tissue

A group of specialized cells working together to perform a specific function, such as muscle tissue.

Organ

A distinct structure composed of different types of tissues cooperating to carry out a specific complex function, such as the heart.

Organ System

A group of interacting organs that coordinate to perform major, life-sustaining bodily functions, such as the circulatory system.

Organism

The highest level of biological organization; a whole living individual whose interacting organ systems work together to sustain life.

Frog Skin

A thin, moist, and permeable surface layer covering the body that allows gas exchange ($O_2$ and $CO_2$) and water absorption.

Frog Heart

A three-chambered muscular pump with thick walls that pumps blood to deliver oxygen and nutrients to all cells.

Model Organism

A species studied to understand specific biological processes; frogs serve as one because they are vertebrates with simple, visible internal anatomy who share key organ systems with humans.

Physical Digestion

The mechanical breakdown of food into smaller particles, occurring primarily in the mouth and stomach.

Chemical Digestion

The enzymatic breakdown of large, complex nutrient molecules such as protein, starch, and fats into simpler absorbable forms.

Systemic Circulation

The circulatory pathway that carries oxygen-rich blood away from the heart to supply body organs and tissues.

Respiratory System

The organ system that supplies body cells with oxygen and removes carbon dioxide as a waste product.

Excretory System

The system that removes metabolic wastes from the body using specialized organs, including the kidneys, ureters, urinary bladder, and urethra.

Nervous System

The control network consisting of the brain, spinal cord, and nerves that regulates behavior, maintains homeostasis, and coordinates sensory and motor functions.

Reproductive System

The system involved in the production of new individuals, consisting of the testes and penis in males, and the ovaries and uterus in females.

Endocrine System

The body system that regulates, coordinates, and controls functions such as moods, growth, development, and metabolism by secreting chemical signals directly into the bloodstream.

Muscular System

A body system made of muscle cells and fiber bundles that contract (tighten) and relax to generate bodily movement and propel materials through the body.

Skeletal System

The system of bones, cartilage, and joints that provides body shape and form, supports and protects organs, enables bodily movement, produces blood cells, and stores minerals.

Ligament

A band of tough, flexible connective tissue that connects bone to bone and provides structural stability to joints.

Tendon

A tough fibrous cord of connective tissue that anchors skeletal muscle to bone, enabling muscle contractions to move the skeleton.

Immune System

A collection of biological structures and processes that protects against disease by identifying foreign threats like viruses, bacteria, and parasites, distinguishing them from the body's healthy tissue.

Integumentary System

The outer protective covering consisting of the skin, hair, nails, and sweat glands that acts as an external barrier, retains body fluids, eliminates wastes, and regulates temperature.

Roots

Specialized plant organs that anchor the plant into the ground and absorb water and dissolved minerals from the soil.

Stem

The plant organ that provides physical support for the plant body and serves as the conduit for transporting materials between roots and leaves.

Leaves

Specialized plant organs that capture sunlight to produce food through photosynthesis and facilitate gas exchange by taking in $CO_2$ and releasing $O_2$.

Xylem

Plant vascular tissue formed by hollow, dead cells that create continuous tubes transporting water and dissolved minerals upward from roots to leaves.

Phloem

Plant vascular tissue that transports soluble sugars and nutrients produced in the leaves to growing regions and storage tissues in both directions.

Anterior Cruciate Ligament (ACL)

A key ligament within the knee joint connecting the femur to the tibia that prevents forward sliding of the tibia and provides rotational joint stability.

Asthma

A chronic respiratory condition characterized by airway inflammation and constriction, causing narrowed passages, reduced airflow to the lungs, and labored breathing.

Homeostasis

The ability of an organism to maintain relatively stable internal conditions within a narrow range despite fluctuations in the external environment.

Receptors

Sensory structures in the skin and brain that detect environmental changes or shifts in internal conditions and send signals to the nervous system.

Negative Feedback

A primary homeostatic mechanism in which the body detects a physiological deviation and triggers a response that opposes the original change to restore baseline balance.