Exam 1 Flashcards
Anatomy
Science of the structure of organisms and their parts, focusing on the physical structure and relationships of body organs and systems.
Physiology
Branch of biology studies the functions and processes of living organisms, focusing on how organs and tissues work and interact to sustain life.
Metabolism
Chemical reactions convert food into energy, build tissues, & remove waste. The catabolic process releases energy (tears down). Anabolic Process uses energy (builds & repairs)
Homeostasis
Body’s process of maintaining stable internal conditions through receptors, control centers, and effectors that regulate variables like temperature, pH, and glucose levels.
Negative Feedback Loop
Feedback mechanism restores homeostasis by reversing deviations using - Receptor: Detects changes
Control Center: Processes information.
Effector: Restores balance.
Biology Progression
Molecules: Basic chemical units.
Cells: Basic unit of life.
Tissues: Groups of similar cells.
Organs: Structures of different tissues.
Organ Systems: organs work together.
Organism: Complete living entity.
Cardiovascular System
Transports nutrients, gases, and waste products throughout the body (heart, blood vessels)
Lymphatic System
Supports immune function and returns excess fluid to the bloodstream (lymph nodes, lymph vessels, spleen).
Respiratory System
Facilitates gas exchange and helps regulate blood pH (lungs, trachea).
Nervous System
Controls and coordinates body activities through electrical signals (brain, spinal cord, nerves). (Sense Organs - smell, tastes buds, hearing, feeling, seeing)
Urinary System
Removes waste products from the blood and regulates fluid balance (kidneys, bladder).
Reproductive System
Facilitates reproduction and produces sex hormones (ovaries, testes).
Skeletal System
Supports the body, protects organs, and provides a framework for movement (bones, joints).
Muscular System
Enables movement, maintains posture, and produces heat (skeletal muscles).
Integumentary System
Protects the body, regulates temperature, and provides sensory information (skin, hair, nails).
Endocrine System
Regulates body functions through hormones (glands such as thyroid, adrenal).
Digestive System
Breaks down food, absorbs nutrients, and eliminates waste (stomach, intestines).
Anatomical Position
The standard reference position in anatomy is the body standing upright, facing forward, with arms at the sides, palms facing forward, legs parallel, feet flat, and toes pointing forward.
Planes
Sagittal Plane: Divides the body into left and right parts.
Coronal Plane: Divides the body into front and back parts.
Transverse Plane: Divides the body into upper and lower parts.
Cross Section
A cut made along a plane perpendicular to the long axis of a structure, typically viewed in a transverse plane.
Superior VS Inferior
Superior: Toward the head or upper part of the body (e.g., the head is superior to the chest).
Inferior: Away from the head or toward the lower part of the body (e.g., the feet are inferior to the knees).
Anterior vs. Posterior
Anterior (Ventral): Toward the front of the body (e.g., the sternum is anterior to the spine).
Posterior (Dorsal): Toward the back of the body (e.g., the spine is posterior to the heart).
Medial vs. Lateral
Medial: Toward the midline of the body (e.g., the nose is medial to the eyes).
Lateral: Away from the midline of the body (e.g., the arms are lateral to the chest)