baro-
pressure
baroreceptors for monitoring blood pressure
basal
base
basal lamina of epithelial basement membrane
bi-
two
bicuspid, having two cusps
bili-
bile
bilirubin, a bile pigment
bio-
life
biology, the study of life and living organisms
blast-
bud, germ
blastocyte, undifferentiated embryonic cell
brachi-
arm
brachial plexus of peripheral nervous system supplies the arm
brady-
slow
bradycardia, abnormally slow heart rate
brev-
short
fibularis brevis, a short leg muscle
broncho-
bronchus
bronchospasm, spasmodic contraction of bronchial
muscle
bucco-
cheek
buccolabial, pertaining to the cheek and lip
calor-
heat
calories, a measure of energy
capill-
hair
blood and lymph capillaries
caput-
head
decapitate, remove the head
carcin-
cancer
carcinogen, a cancer-causing agent
cardi-, cardio-
heart
cardiotoxic, harmful to the heart
carneo-
flesh
trabeculae carneae, ridges of muscle in the ventricles of the
heart
carot-
(1) carrot, (2) stupor
(1) carotene, an orange pigment, (2) carotid
arteries in the neck, blockage of which causes fainting
cata-
down
catabolism, chemical breakdown
caud-
tail
caudal (directional term)
cec-
blind
cecum of large intestine, a blind-ended pouch
cele-
abdominal
celiac artery, in the abdomen
cephal-
head
cephalometer, an instrument for measuring the head
cerebro-
brain, especially the cerebrum
cerebrospinal, pertaining to the
brain and spinal cord
cervic-, cervix
neck
cervix of the uterus
chiasm-
crossing
optic chiasma, where optic nerves cross
chole-
bile
cholesterol, cholecystokinin, a bile-secreting hormone
chondr-
cartilage
chondrogenic, giving rise to cartilage
chrom-
colored
chromosome, so named because they stain darkly
cili-
small hair
ciliated epithelium
circum-
around
circumnuclear, surrounding the nucleus
clavic-
key
clavicle, a “skeleton key”
co-, con-
together
concentric, common center, together in the center
coccy-
cuckoo
coccyx, which is beak-shaped
cochlea
snail shell
the cochlea of the inner ear, which is coiled like a snail
shell
coel-
hollow
coelom, the ventral body cavity
commis-
united
gray commissure of the spinal cord connects the two col-
umns of gray matter
concha
shell
nasal conchae, coiled shelves of bone in the nasal cavity
contra-
against, opposite
contraceptive, agent preventing conception
Prefixes and Combining Forms
a-, an-
absence, lack
acardia, lack of a heart; anaerobic, in the absence of
oxygen
ab-
departing from, away from
abnormal, departing from normal
acou-
hearing
acoustics, the science of sound
ac-, acro-
extreme or extremity, peak
acrodermatitis, inflammation of the
skin of the extremities
ad-
to, toward
adorbital, toward the orbit
aden-, adeno-
gland
adeniform, resembling a gland in shape
adren-
toward the kidney
adrenal gland, adjacent to the kidney
aero-
air
aerobic respiration, oxygen-requiring metabolism
af-
toward
afferent neurons, which carry impulses to the central nervous
system
agon-
contest
agonistic and antagonistic muscles, which oppose each other
alb-
white
corpus albicans of the ovary, a white scar tissue
aliment-
nourish
alimentary canal, or digestive tract
allel-
of one another
alleles, alternative expressions of a gene
amphi-
on both sides, of both kinds
amphibian, an organism capable of liv-
ing in water and on land
ana-
apart, up, again
anaphase of mitosis, when the chromosomes separate
anastomos-
come together
arteriovenous anastomosis, a connection be-
tween an artery and a vein
aneurysm
a widening
aortic aneurysm, a weak spot that causes enlarge-
ment of the blood vessel
angi-
vessel
angiitis, inflammation of a lymph vessel or blood vessel
angin-
choked
angina pectoris, a choked feeling in the chest due to dys-
function of the heart
ant-, anti-
opposed to, preventing, inhibiting
anticoagulant, a substance
that prevents blood coagulation
ante-
preceding, before
antecubital, in front of the elbow
aort-
great artery
aorta
ap-, api-
tip, extremity
apex of the heart
append-
hang to
appendicular skeleton
aqua-, aque-
water
aqueous solutions
arbor
tree
arbor vitae of the cerebellum, the treelike pattern of white matter
areola-
open space
areolar connective tissue, a loose connective tissue
arrect-
upright
arrector pili muscles of the skin, which make the hairs
stand erect
arthr-, arthro-
joint
arthropathy, any joint disease
artic-
joint
articular surfaces of bones, the points of connection
atri-
vestibule
atria, upper chambers of the heart
auscult-
listen
auscultatory method for measuring blood pressure
aut-, auto-
self
autogenous, self-generated
ax-, axi-, axo-
axis, axle
axial skeleton, axis of vertebral column
azyg-
unpaired
azygous vein, an unpaired vessel
Word Roots, Prefixes, Suffixes,
and Combining Forms
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