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Chapter 2
Body Structure, Cells, and Tissues
86
Medical
Intermediate
06/09/2023

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Term
cell
Definition
the basic unit of living organisms
Term
Integumentary system
Definition
includes the skin and its
associated structures, such as hair, sweat glands, and
oil glands. This system functions in protection and also
helps to regulate body temperature
Term
skeletal system
Definition
includes the bones and joints
Term
muscular system
Definition
moves the skeleton and makes
up the walls of internal organs. The muscular system and
skeleton protect vital body parts
Term
nervous system
Definition
consisting of the brain, spinal cord,
and nerves, and including the sensory system and respiratory system
Term
respiratory system
Definition
obtains the oxygen
needed for metabolism and eliminates carbon dioxide, a byproduct of metabolism.
Term
digestive system
Definition
which takes in, breaks down, and
absorbs nutrients and eliminates undigested waste.
Term
urinary system
Definition
eliminates soluble waste and
balances the volume and composition of body fluids
Term
adenosine triphosphate (ATP)
Definition
The energy compound of the cell that stores energy needed for cell activities
Term
carbohydrates
Definition
The category of organic compounds that includes sugars and starches
Term
cell
Definition
The basic structural and functional unit of the living organism, a microscopic unit that
combines with other cells to form tissues (root: cyt/o
Term
chromosome
Definition
A thread-like body in a cell’s nucleus that contains genetic information
Term
cytology
Definition
the study of cells
Term
cytoplasm
Definition
The fluid that fills a cell and holds the organelles
Term
deoxyribonucleic acid (DNA)
Definition
The genetic compound of the cell, makes up the genes
Term
enzyme
Definition
An organic substance that speeds the rate of a metabolic reaction
Term
gene
Definition
A hereditary unit composed of DNA and combined with other genes to form the
chromosomes
Term
glucose
Definition
A simple sugar that circulates in the blood, the main energy source for metabolism (roots:
gluc/o, glyc/o)
Term
histology
Definition
study of tissues
Term
homeostasis
Definition
A steady state, a condition of internal stability and constancy
Term
lipid
Definition
A category of organic compounds that includes fats (root: lip/o)
Term
membrane
Definition
A simple, very thin, and pliable sheet of tissue that might cover an organ, line a cavity, or
separate structures
Term
metabolism
Definition
The sum of all the physical and chemical reactions that occur within an organism
Term
mitosis
Definition
cell division
Term
mucus
Definition
A thick fluid secreted by cells in membranes and glands that lubricates and protects tissues
(roots: muc/o, myx/o); the adjective is mucous
Term
nucleus
Definition
The cell’s control center; directs all cellular activities based on the information contained in
its chromosomes (roots: nucle/o, kary/o)
Term
organ
Definition
A part of the body with a specific function, a component of a body system
Term
organelle
Definition
A specialized structure in the cytoplasm of a cell
Term
protein
Definition
A category of organic compounds that includes structural materials, enzymes, and some
hormones
Term
ribonucleic acid (RNA)
Definition
An organic compound involved in the manufacture of proteins within cells
Term
tissue
Definition
A group of cells that acts together for a specific purpose (roots: hist/o, histi/o); types include
epithelial tissue, connective tissue, muscle tissue, and nervous tissue
Term
root: morph/o
Definition
meaning: form
example: polymorphous
definition of example: having many forms
Term
root: cyt/o, -cyte
Definition
meaning: cell
example: cytologist
definition of example: one who studies cells
Term
root: nucle/o
Definition
meaning: nucleus
example: nuclear
definition of example: pertaining to a nucleus
Term
root: kary/o
Definition
meaning: nucleus
example: karyotype
definition of example: picture of a cell’s chromosomes organized
according to size
Term
root: hist/o, histi/o
Definition
meaning: tissue
example: histocompatibility
definition of example: tissue similarity that permits transplantation
Term
root: fibr/o
Definition
meaning: fiber
example: fibrosis
definition of example: abnormal formation of fibrous tissue
Term
root: reticul/o
Definition
meaning: network
example: reticulum
definition of example: network
Term
root: aden/o
Definition
meaning: gland
example: adenoma
definition of example: tumor (-oma) of a gland
Term
root: papill/o
Definition
meaning: nipple
example: papilla
definition of example: projection that resembles a nipple
Term
root: myx/o
Definition
meaning: mucus
example: myxadenitis
definition of example: inflammation (-itis) of a mucus-secreting gland
Term
root: muc/o
Definition
meaning: mucus, mucous
membrane
example: mucorrhea
definition of example: increased flow (-rhea) of mucus
Term
root: somat/o, -some
Definition
meaning: body, small body
example: chromosome
definition of example: small body that takes up color (dye) (chrom/o)
Term
root: blast/o, -blast
Definition
meaning: immature cell, productive cell,
embryonic cell
example: histioblast
definition of example: a tissue-forming cell
Term
root: gen
Definition
meaning: origin, formation
example: karyogenesis
definition of example: formation of a nucleus
Term
root: phag/o
Definition
meaning: eat, ingest
example: autophagy
definition of meaning: self (auto)-destruction of a cell’s
organelles
Term
root: phil
Definition
meaning: attract, absorb
example: basophilic
definition of example: attracting basic stain
Term
root: plas
Definition
meaning: formation, molding, development
example: hyperplasia
definition of example: overdevelopment of an organ or
tissue
Term
root: trop
Definition
meaning: act on, affect
example: chronotropic
definition of example: affecting rate or timing (chron/o)
Term
root: troph/o
Definition
meaning: feeding, growth, nourishment
example: atrophy
definition of example: tissue wasting
Term
suffixes: -ase
Definition
meaning: enzyme
example: lipase
definition of example: enzyme that digests fat (lipid)
Term
suffixes: -ose
Definition
meaning: sugar
example: lactose
definition of example: milk sugar
Term
root: hydr/o
Definition
meaning: water, fluid
example: hydration
definition of example: addition of water, relative amount of water
present
Term
root: gluc/o
Definition
meaning: glucose
example: glucogenesis
definition of example: production of glucose
Term
root: glyc/o
Definition
meaning: sugar, glucose
example: normoglycemia
definition of example: normal blood sugar level
Term
root: sacchar/o
Definition
meaning: sugar
example: polysaccharide
definition of example: compound containing many simple sugars
Term
root: amyl/o
Definition
meaning: starch
example: amyloid
definition of example: resembling starch
Term
root: lip/o
Definition
meaning: lipid, fat
example: lipophilic
definition of example: attracting or absorbing lipids
Term
root: adip/o
Definition
meaning: fat
example: adiposuria
definition of example: presence of fat in the urine (ur/o)
Term
root: steat/o
Definition
meaning: fatty
example: steatorrhea
definition of example: discharge (-rhea) of fatty stools
Term
root: prote/o
Definition
meaning: protein
example: protease
definition of example: enzyme that digests protein
Term
root: cephal/o
Definition
meaning: head
example: megacephaly
definition of example: abnormal largeness of the head
Term
root: cervic/o
Definition
meaning: neck
example: cervicofacial
definition of example: pertaining to the neck and face
Term
root: thorac/o
Definition
meaning: chest, thorax
example: thoracotomy
definition of example: incision (-tomy) into the chest
Term
root: abdomin/o
Definition
meaning: abdomen
example: intra-abdominal
definition of example: within the abdomen
Term
root: celi/o
Definition
meaning: abdomen
example: celiocentesis
definition of example: surgical puncture (centesis) of the abdomen
Term
root: lapar/o
Definition
meaning: abdominal wall
example: laparoscope
definition of example: instrument (-scope) for viewing the peritoneal
cavity through the abdominal wall
Term
root: lumb/o
Definition
meaning: lumbar region, lower back
example: thoracolumbar
definition of example: pertaining to the chest and lumbar region
Term
root: periton, peritone/o
Definition
meaning: peritoneum
example: peritoneal
definition of example: pertaining to the peritoneum
Term
root: acro
Definition
meaning: extremity, end
example: acrocyanosis
definition of example: bluish discoloration of the extremities
Term
root: brachi/o
Definition
meaning: arm
example: antebrachium
definition of example: forearm
Term
root: dactyl/o
Definition
meaning: finger, toe
example: polydactyly
definition of example: having more than the normal number of fingers or toes
Term
root: ped/o
Definition
meaning: foot
example: pedometer
definition of example: instrument that measures footsteps
Term
root: pod/o
Definition
meaning: foot
example: podiatric
definition of example: pertaining to study and treatment of the foot
Term
prefix: circum-
Definition
meaning: around
example: circumoral
definition of example: around the mouth
Term
prefix: peri-
Definition
meaning: around
example: periorbital
definition of example: around the orbit (eye socket)
Term
prefix: intra-
Definition
meaning: in, within
example: intravascular
definition of example: within a vessel (vascul/o)
Term
prefix: epi-
Definition
meaning: on, over
example: epithelial
definition of example: referring to epithelium, tissue that covers
surfaces
Term
prefix: extra-
Definition
meaning: outside
example: extrathoracic
definition of example: outside the thorax
Term
prefix: infra-a
Definition
meaning: below
example: infrascapular
definition of example: below the scapula (shoulder blade)
Term
prefix: sub-a
Definition
meaning: below, under
example: sublingual
definition of example: under the tongue (lingu/o)
Term
prefix: inter-
Definition
meaning: between
example: intercostal
definition of example: between the ribs (cost/o)
Term
prefix: juxta-
Definition
meaning: near, beside
example: juxtaposition
definition of example: a location near or beside another
structure
Term
prefix: para-
Definition
meaning: near, beside
example: parasagittal
definition of example: near or beside a sagittal plane
Term
prefix: retro-
Definition
meaning: behind, backward
example: retrouterine
definition of example: behind the uterus
Term
prefix: supra-
Definition
meaning: above
example: suprapatellar
definition of example: above the patella (kneecap)
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