A&P first Unit quizlet

Anatomy

Study of body structure and relationships among parts

Physiology

Study of how body parts function

Inspection

Observing the body for physical signs

Palpation

Feeling body structures with hands

Auscultation

Listening to body sounds (e.g., heart, lungs)

Percussion

Tapping on the body to detect abnormalities by sound

Atom

Smallest unit of matter

Molecule

Two or more atoms bonded together

Organelle

Specialized structure within a cell

Cell

Basic unit of life

Tissue

Group of similar cells performing a function

Organ

Structure composed of multiple tissue types

Organ System

Group of organs working together

Organism

A living being composed of organ systems

Homeostasis

Maintenance of stable internal conditions

Negative Feedback

Mechanism that reverses a change to maintain balance

Positive Feedback

Mechanism that amplifies a change

Set Point

Ideal value for a physiological condition

Anatomical Position

Standard reference position: standing, facing forward, palms forward

Supine

Lying face up

Prone

Lying face down

Superior

Toward the head

Inferior

Toward the feet

Anterior (Ventral)

Toward the front

Posterior (Dorsal)

Toward the back

Medial

Toward the midline

Lateral

Away from the midline

Proximal

Closer to the point of attachment

Distal

Farther from the point of attachment

Superficial

Toward the surface

Deep

Away from the surface

Sagittal Plane

Divides body into left and right portions

Frontal (Coronal) Plane

Divides body into front and back portions

Transverse Plane

Divides body into upper and lower portions

Cranial Cavity

Contains the brain

Thoracic Cavity

Contains the heart and lungs

Abdominopelvic Cavity

Contains digestive, urinary, and reproductive organs