SA Node
Saltatory conduction
Sarcolemma
Sarcomere
Sarcoplasmic reticulum (SR)
Saturation
Schwann cell
Second messenger
Secondary active transport
Secondary bronchus
Secretion
Secretion in kidney
Segmental arteries
Selective permeability
Semilunar valves
Serotonin
Serous Fluids
Serous membrane
Shunt (n)
Shunt (v)
Simple diffusion
Simple squamous epithelial cells
Simple squamous epithelium
Skeletal muscle
Skeletal muscle cell
Sliding filament theory
Slow calcium channel
Slow-twitch fibers
Small cardiac vein
Smooth muscle
Sodium channel
Sodium/potassium [ATPase ion] pump
Solubility
Solute
Solvent
Solvent drag
Soma
Somatic motor system
Somatic nervous system
SR calcium channel
Stethoscope
Stimulus
Striations
Stroke volume
Substrate phosphorylation
Subthreshold stimulus
Superior vena cava
Support cells
Surface tension
Surfactant
Surfactant-secreting cell
Sympathetic nervous system
Synapse
Synaptic cleft
Synaptic potential
Synaptic vesicles
Synthetic enzyme
Systemic arteries
Systemic capillary
Systemic circuit
Systemic veins
Systole
Systolic pressure