Chapter 2 Flashcards
The levels of organization from the least to the most complex are the:
cellular, tissue, organ, system, organism
• cellular level,
the smallest structural and functional unit of the body.
• tissue level,
groups of cells that perform a specialized function.
• organ level,
groups of tissues that perform a specific function.
• system level,
groups of organs that are interconnected or that have similar or interrelated functions.
• organism level,
collection of body systems that makes up the most complex level—a living human being.
chondr/o
cartilage
-oma
tumor
chondr/oma (kŏn-DRŌ-mă □):
tumor composed of cartilage
cyt/o
cell
-meter
instrument for measuring
cyt/o/meter (sī-TŎM-ĕ-ter □):
instrument for counting and measuring cells
hist/o
tissue
-lysis
separation, destruction, loosening
hist/o/lysis (hĭs-TŎL-ĭ-sĭs □):
separation, destruction, or loosening of tissue
nucle/o
nucleus
ar
pertaining to
nucle/ar (NŪ-klē-ăr □):
pertaining to the nucleus
anter/o
anterior, front
ior
pertaining to
anter/ior (ăn-TĒ-rē-ōr □):
pertaining to the front (of the body, organ, or structure)
caud/o
tail
-ad
toward
caud/ad (KAW-dăd □):
toward the tail
dist/o
far, farthest
-al
pertaining to
dist/al (DĬS-tăl □):
pertaining to the farthest (point of attachment)
dors/o
back (of body)
dors/al (DŌR-săl □):
pertaining to the back (of the body)
infer/o
lower, below
infer/ior (ĭn-FĒ-rē-or □):
pertaining to below or lower (structure or surface)
later/o
side, to one side
later/al (LĂT-ĕr-ăl □):
pertaining to the side
medi/o
middle
medi/al (MĒ-dē-ăl □):
pertaining to the middle
poster/o
back (of body), behind, posterior
poster/ior (pŏs-TĒ-rē-or □):
pertaining to the back (of the body, organ, or structure)
proxim/o
near, nearest
proxim/al (PRŎK-sĭm-ăl □):
pertaining to the nearest (point of attachment)
super/o
upper, above
super/ior (soo-PĒ-rē-or □):
pertaining to above or upper (part of the body, organ, or structure)
ventr/o
belly, belly side
ventr/al (VĔN-trăl □):
pertaining to the belly side (front of the body)
medi/o-:
middle
-ad
toward
medi/ad (MĒ-dē-ăd □):
toward the middle or center
hist/o:
tissue
-logist
specialist in the study of
hist/o/logist (hĭs-TŎL-ō-jĭst □):
specialist in the study of tissue
cyt/o:
cell
-logy
study of
cyt/o/logy (sī-TŎL-ō-jē □):
study of cells
-lysis
separation; destruction; loosening
cyt/o/lysis (sī-TŎL-ĭ-sĭs □):
destruction, dissolution, or separation of a cell
Cells are the smallest
living units of structure and function in the human body.
Every tissue and organ in the body is composed of
cells.
The nucleus is the
control center of the cell and is responsible for reproduction. This spherical unit contains genetic codes for maintaining life systems of the organism and for issuing commands for growth and reproduction.
The combining form (CF) for nucleus is / .
nucle/o
Any chemical substance, such as a drug, that interferes with or destroys the cellular reproductive process in the nucleus is referred to as a
nucle/o/toxic substance. Examples of nucle/o/toxic drugs are those administered to patients with cancer during chemotherapy.
pertaining to poison:
-toxic
Recall that cyt/o and -cyte are used to form words that refer to a .
cell
A cyt/o/logist is usually a biologist who specializes in
the study of cells, especially one who uses cyt/o/log/ic techniques to diagnose neoplasms.
Using cyt/o, build a word that means study of cells: / / .
cyt/o/logy
Use cyt/o to form words that mean specialist in the study of cells
cyt/o/logist
Use cyt/o to form words that mean dissolution or destruction of a cell
cyt/o/lysis
At the tissue level, the structural organization of the human body consists of
groups of cells working together to carry out a specialized activity.
The medical scientist who specializes in the study of microscopic structures of tissues is called a
hist/o/logist.
The suffixes -ac, -al, -ar, -iac, -ic, and -ior are adjective endings that mean
pertaining to.These suffixes help describe position, direction, body divisions, and body structures.
Use the adjective ending -al to form words that mean pertaining to the back (of body):
dors/al
Use the adjective ending -al to form words that mean pertaining to side, to one side: later / .
later/al
Use the adjective ending -al to form words that mean pertaining to belly, belly side: ventr / .
ventr/al
list the 10 adjective suffixes that mean ‘pertaining to’
??
Four additional adjective suffixes meaning pertaining to
-ary, -eal, -ous, and -tic.
To guarantee consistency in descriptions of location, the anatomic/al position is a reference point to describe
the location or direction of a body structure.
In anatomic/al position, the body is
erect and the eyes are looking forward. The arms hang to the sides, with palms facing forward; the legs are parallel with the toes pointing straight ahead.
2–12 When a person is standing upright, facing forward, arms at his or her sides, palms facing forward, legs parallel, and feet slightly apart with the toes pointing forward, he or she is in the standard position called the / position.
anatomic/al; ăn-ă-TŎM-ĭk-ăl
front of the body: / and / .
anter/ior and ventr/al
back of the body: / and / .
poster/ior and dors/al
What position of the body do the terms anter/ior and ventr/al refer to?
front of the body
What position of the body do the terms poster/ior and dors/al refer to?
back of the body
The term poster/o/anter/ior (PA) refers to
the back and front of the body.
pertaining to back: .
pŏs-TĒ-rē-or
pertaining to front
ăn-TĒ-rē-or or
2–16 Directional terms are commonly used in radi/o/logy to describe
the direction of the x-ray beam from its source and then its point of exit.
A PA projection indicates that the path of the beam enters the body (See Figure 2-3.)
on the posterior side and exits anteriorly.
An anter/o/poster/ior (AP) projection indicates that
the path of the beam enters the body on the side and exits on the side.
The chest x-ray (CXR) helps diagnose conditions affecting the chest, its contents, and nearby structures. It can be taken in either the AP or the PA position. The abbreviation that means anter/o/poster/ior is
AP
The chest x-ray (CXR) helps diagnose conditions affecting the chest, its contents, and nearby structures. It can be taken in either the AP or the PA position. The abbreviation that means poster/o/anterior is .
PA
The stomach is located on the / side of the body.
anter/ior
The shoulder blades are located on the / side of the body.
poster/ior
Combine infer/o (lower, below) + -ior (pertaining to) to form a directional term that literally means pertaining to lower or below.
infer/ior
In medical terms, the prefix super- designates
an upper position. When you say “the head is superior to the stomach,” you mean it is located above the stomach.
When you say “the eyes are superior to the mouth,” you mean they are located the mouth.
above
The word element later/o means
side, to one side.
A radiographic projection that enters through the left or right side of the body is referred to as
a later/al projection.
The term later/al position refers to the (of the body).
side
Review the three basic rules for building medical words:
• Rule 1: The word root links a suffix that begins with a vowel.• Rule 2: The combining form (root + o) links a suffix that begins with a consonant.• Rule 3: The combining form (root + o) links a root to another root to form a compound word. (This rule holds true even if the next root begins with a vowel.)
radi/o/logy that specify the direction of the x-ray beam from its source to its exit surface before striking the film pertaining to the side or to one side (of the body): /.
LĂT-ĕr-ăl
radi/o/logy that specify the direction of the x-ray beam from its source to its exit surface before striking the film pertaining to the anterior, or front, and the side (of the body):
anter/o/later/al
radi/o/logy that specify the direction of the x-ray beam from its source to its exit surface before striking the film pertaining to the posterior, or back, and the side (of the body):
poster/o/later/al
The term medi/al describes
the midline of the body or a structure. The medi/al portion of the face contains the nose.
From the term medi/al, determine the root that means middle:
medi
From the term medi/al, determine the suffix that means pertaining to: .
al
The suffix for toward is .
-ad
The word root for middle is .
medi
Combine medi + -ad to form a word that means toward the middle. /
medi/ad
Anatomists use the term infer/ior to refer to
a body structure located below another body structure or the lower part of a structure. For example, your chin is situated infer/ior to your mouth. The rectum is the infer/ior portion of the colon.
To indicate that a structure is below another structure, use the directional term / .
infer/ior
To indicate the lower part of a structure, use the directional term / .
infer/ior
The legs are / to the trunk.
infer/ior
The eyes are / to the nose.
later/al
cephal/ad (SĔF-ă-lăd)
refers to the direction toward the head.
Anatomists and other health care professionals use the term super/ior to refer to
a body structure that is above another body structure or toward the head because the head is the most superior structure of the body.
When referring to the direction going toward the head, use the term / .
cephal/ad (SĔF-ă-lăd)
The chest is / to the stomach.
super/ior
The stomach is / to the lungs.
infer/ior
The head is / to the neck.
super/ior
The CF caud/o means
tail. In this sense, tail designates a position toward the end of the body, away from the head. In humans, it also refers to an infer/ior position in the body or within a structure.
Combine caud + -al to build a word that means pertaining to the tail. /
caud/al; KAWD-ăl
\The terms proxim/al and dist/al are
positional and directional terms.
Proxim/al describes a structure as being
nearest the point of attachment to the trunk or near the beginning of a structure.
Dist/al describes a structure as
being far from the point of attachment to the trunk or from the beginning of a structure.
nearest the point of attachment: / .
proxim/al
farthest from the point of attachment: / .
dist/al
The directional element proxim/o means
near or nearest the point of attachment;
To describe a structure nearest the point of attachment, use the directional term / .
proximal
To describe a structure as being farthest from the point of attachment, use the directional term / .
distal
The prefix ab- means
from, away from;
the suffix -duction means
act of leading, bringing, conducting.
ad/duction (ă)-DŬK-shŭn
movement away from the body.
Some directional terms, such as ab/duction and ad/duction, indicate
movement away from the body and movement toward the body.
The prefix ab- means
from, away from;
The prefix ad- means
toward
the suffix -duction means
act of leading, bringing, conducting.
The CF or suffix that matches its definition caud/o
- tail
The CF or suffix that matches its definition later/o
- side, to one side
The CF or suffix that matches its definition cyt/o
- cell
The CF or suffix that matches its definition medi/o
- middle
The CF or suffix that matches its definition dist/o
- far, farthest
The CF or suffix that matches its definition proxim/o
- near, nearest
The CF or suffix that matches its definition hist/o
- tissue
The CF or suffix that matches its definition ventr/o
- belly, belly side
The CF or suffix that matches its definition infer/o
- lower, below
The CF or suffix that matches its definition ‘-al, -ior
- pertaining to
The CF or suffix that matches its definition ‘logy
- study of
The CF or suffix that matches its definition ‘-toxic
- poison
The CF or suffix that matches its definition ‘-ad
- toward
The CF or suffix that matches its definition ‘-logist
- specialist in study of
The CF or suffix that matches its definition ‘-lysis
- separation; destruction; loosening
abdomin/o
abdomen
abdomin/al (ăb-DŎM-ĭ-năl □):
pertaining to the abdomen
cephal/o
head
cephal/ad (SĔF-ă-lăd □):
toward the head
cervic/o
neck; cervix uteri (neck of uterus)
cervic/al (SĔR-vĭ-kăl □):
pertaining to the neck of the body or the neck of the uterus
crani/o
cranium (skull)
crani/al (KRĀ-nē-ăl □):
pertaining to the cranium or skull
gastr/o
stomach
gastr/ic (GĂS-trĭk □):
pertaining to the stomach
ili/o
ilium (lateral, flaring portion of hip bone)
ili/ac (ĬL-ē-ăk □):
pertaining to the ilium
inguin/o
groin
inguin/al (ĬNG-gwĭ-năl □):
pertaining to the groin
lumb/o
loins (lower back)
lumb/ar (LŬM-băr □):
pertaining to the loin area or lower back
pelv/i*
pelvis
pelv/i/meter (pĕl-VĬM-ĕ-tĕr □):
instrument for measuring the pelvis
spin/o
spine
spin/al (SPÎ-năl □):
pertaining to the spine or spinal column
thorac/o
chest
thorac/ic (thō-RĂS-ĭk □):
pertaining to the chest