A-
A band
Abdominal aorta
Absolute refractory period
Acetyl CoA
Acetylcholine (ACh)
Acetylcholinesterase
Acidosis
Acids
Actin
Action potential
Active channels
Active transport
Adenine
Adenine nucleotide
Adenosine triphosphate
Adipose capsule
ADP
Adrenal gland
Adrenergic
Aerobic
Afferent arteriole
Afferent nerve
Affinity
Albumin
Aldosterone
Alkalosis
Allergic reactions
All-or-none event
Alveolar duct
Alveolar fluid
Alveolar sac
Alveolus
Amniotic Fluid
Anaerobic
Angiotensin Converting Enzyme (ACE)
Angiotensin I
Angiotensin II
Angiotensinogen
Anion
Anoxia
Anterior interventricular artery
Antidiuretic hormone (ADH)
Antiport transport protein
Aorta
Aortic arch
Aortic semilunar valve
Arcuate artery
Arcuate vein
Arteriole
Arteriosclerosis
Artery
Ascending loop of Henle (thick segment)
Asynchronous
ATP
ATPase
Autonomic nervous system (ANS)
Autoregulation
Autorhythmic cells
AV bundle
AV node
Axoaxonic synapse
Axodendritic synapse
Axon
Axon collateral
Axon hillock
Axon terminal
Axosomatic synapse