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Medical Terms ch 2
chapter 2
Question | Answer |
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anatomical reference systems | body cavities, body planes, body directions and structural units |
study of the structure of the body | anatomy |
study of the functions of the structures of the body | physiology |
imaginary vertical/horizontal lines used to divide the body into sections | body planes |
up and down plane that is a right angle to the horizon | vertical |
divides the body into equal left and right halves | midsagittal plane |
vertical plane that divides the body into unequal left and right portions | sagittal plane |
verticl plane that divides the body into anterior and posterior planes | frontal plane |
another name for frontal plane | coronal plane |
flat crosswire plane | horizonal plane |
horizontal plane that divides the body into superior and inferior portions | transverse plane |
refers to the front, bell side of the body or organ | ventral |
refers to the back of the organ or body | dorsal |
situated in the front; front or forward part of an organ | anterior |
situated in the back, back part of the organ | posterior |
uppermost, above or toward the head | superior |
lowermost, below or toward the feet | inferior |
toward the head | cephalic |
toward the lower back of the body | caudal |
situated nearest the midline or beginning of body structure | proximal |
situated farthest from the midline or beginning of a body structure | distal |
direction towards or nearer to the midline | medial |
direction towards or nearer the side and away from the midline | lateral |
2 major body cavities | dorsal and ventral |
2 portions of the dorsal cavity | cranial and spinal |
located along the back of the body and head and contains organs of the nervous system | dorsal |
located within the skull, surrounds and protects the brain | cranial cavity |
located within the spinal column, surrounds and protects the spinal cord | spinal cavity |
located along the front of the body, contains the body organs that maintain homeostasis | ventral cavity |
body maintains a constant internal environment | homeostasis |
surrounds and protects the heart and lungs | thoracic cavity |
mucle that separates the thoracic and abdominal cavity | diaphragm |
contains the major organs of digestion | abdominal cavity |
space by hip bones and contains organs of the reproductive and excretory system | pelvic cavity |
refers to the combo of the pelvic and abdominal cavity | abdominopelvic |
refers to the groin and entire lower area of abdomen | inguinal |
system tat divides the abdomen and lower portion of the thorax into 9 parts | regions of the thorax and abdomen |
upper left and right sides of the body and covered by lower ribs | hypochondriac region |
region located above the stomach | epigastric region |
located on the left and right sides near the inward curve of the spine | lumbar region |
pit in the center of abdominal wall marks the point where umbilical cord was attached | umbilical region |
left and right regions over hip bones | iliac regions |
region located below the stomach | hypogastric region |
multilayered membrane that protects and holds the organs in place within the abdomen cavity | peritoneum |
thin layer of tissue that covers a surface, lines a cavity or divides space or organ | membrane |
outer layer of peritoneum that lines the interior of abdominal wall | parietal peritoneum |
inner layer of the peritoneum that surrounds the organs in abdominal cavity | visceral peritoneum |
located behind the peritoneum | retroperitoneal |
inflammation of the peritoneum | peritonitis |
basic structural and functional units of the body | cells |
study of anatomy, physiology, pathology and chemistry of a cell | cytology |
tissue that surrounds and protects the contents of the cell by separating them from its external environment | cell membrane |
material within the cell membrane that is not part of the nucleus | cytoplasm |
surrounds by cell membrane, has 2 functions; controls activities of cells and helps cells divide | nucleus |
unspecialized cells that are able to renew themselves fro long period of time by cell division | stem cells |
another name for adult stem cells | somatic cells |
undifferentiated cells found among differentiated cells in a tissue or organ | adult stem cells |
undifferentiated cells that are unlike any specific adult stem cells | embryonic stem cells |
fundamental physical and functional unit of hereditary | gene |
study of how genes are transferred from parents to their children and roles of genes in healthy and disease | genetics |
specialist in the field of genetics | geneticist |
inherited from either parent, the offspring will inherit the genetic condition | dominant trait |
genetic structures located within the nucleus of each cell | chromosomes |
complete set of genetic info of an individual | genome |
condition that appears only in individuals who received 2 copies of a mutant gene - 1 from each parent | recessive trait |
any cell in the body except the gametes | somatic cell |
only type of cell that doesn't contain 46 chromosomes | sex cell |
packaged in a chromosome as two spiraling strans that twist together to form a double helix | DNA |
found in the nucleus of all types of cells except erythrocytes (red blood cells) | DNA |
change in the sequence of a DNA molecule | genetic mutation |
change within the cells of the body | somatic cell mutation |
manipulating or splicing of genes for scientific or medical purposes | genetic engineering |
pathologic condition caused by an absent or defective gene | genetic disorder |
disorder present at birth and affects both the respiratory and digestive system | cystic fibrosis |
disorder associated with characteristic facial appearance, learning disabilities and physical appearances | down syndrome |
hereditary bleeding disorder in which a blood clotting factor is missing | hemophilia |
disorder passed on from parent to child, causes nerve degeneration with symptoms that appear midlife | huntingtons disease |
group of genetic diseases that are characterized by progressive weakness and degeneration of skeletal muscles that control movement | muscular dystrophy |
genetic disorder in which the essential digestive enzyme phenylalanine hydroxylase | phenylketonuria PKU |
fatal genetic disorder in which harmful quantities of a fatty substance build up in tissues and nerve cells in the brain | tay-sachs |
group or layer of similarly specialized cells that join together to perform specific functions | tissue |
4 main types of tissue | epithelial, connective, muscle and nerve |
study of the structure, composition and function of tissues | histology |
specialist in the study of the organization of tissues at all levels | histologist |
forms a protective covering for all of the internal and external surfaces of the body | epithelial tissue |
specialized tissue that forms the epidermis of the skin and surface layer of mucous membranes | specialized epithelial tissue that lines the blood and lymp vessels, body cavities, glands and organs |
support and connect organs and other body tissue | connective tissue |
4 types of connective tissue | dense, adipose, loose, liquid |
tissue that forms the join and framework of body (bone, cartilage) | dense connective tissue |
provides protective padding, insulation and support | adipose connective tissue |
tissue surrounds various organs and supports both nerve cells and blood vessels | loose connective tissue |
tissue that is blood | liquid connective tissue |
contains cells with the specialized ability to react to stimuli and to conduct electrical impulses | nerve tissue |
contains cells with the specialized ability to contract and relax | muscle tissue |
defective development of the congenital absence of an organ or tissue | aplasia |
incomplete development of an organ or tissue usually due to a deficiency in the # of cells | hypoplasia |
change in the structure of cells and in their orientation to each other | anaplasia |
abnormal development or growth of cells, tissues or organs | dysplasia |
enlargement of an organ or tissue because of an abnormal increase in the # of cells in the tissues | hyperplasia |
general increase in the bulk of a body part or organ that is due to an increase in the size but not in # of cells in tissues | hypertrophy |
group of specialized epithelial that are capable of producing secretions | gland |
secrete chemical substance into ducts that lead either to other organs or out of body (sweat glands) | exocrine glands |
glands that produce hormones, do not have ducts | endocrine glands |
inflammation of a gland | adenitis |
malignant tumor that originates in the glandular tissue | adenocarcinoma |
benign tumor that arises in glandular tissue | adenoma |
abnormal softening of a gland | adenomalacia |
any disease condition of the gland | adenosis |
abnormal hardening of a gland | adenosclerosis |
surgical removal of a gland | adenectomy |
independent part of the body that performs a specific functions | organs |
study of the nature and cause of disease that involves changes in structure and function | pathology |
study of the causes of diseases | etiology |
any condition that is transmitted from one person to another either by direct or by indirect contact with contaminated objects | communicable disease |
situations in which a susceptible person is infected by contact with a contaminated surface | indirect contact transmission |
spread of disease through contact with blood or other body fluids that are contaminated with blood | blood borne transmission |
occurs through contact with contaminated respiratory droplets spread by cough or sneeze | airborne transmission |
spread of disease by insect or animal bite | vector borne transmission |
specialist in the study of outbreaks of disease within a population growth | epidemiologist |
ongoing presence of a disease within a population group or area | endemic |
sudden and widespread outbreak of a disease within a specific population group or area | epidemic |
outbreak of a disease occurring over a large geographic area | pandemic |
produces symptoms for which no physiological or anatomical cause can be identified | functional disorder |
unfavorable response due to prescribed medical treatment | iatrogenic illness |
illness caused by living pathogenic organisms such as bacteria and viruses | infectious diseases |
disease acquired in a hospital setting | nosocomial infection |
produces symptoms caused by detectable physical changes in the body | organic disorder |
abnormal condition that exists at the time of birth | congenital disorder |
results in an anomaly or malformation (absence of limb, extra toe) | developmental disorder |
congenital absence of a normal opening or failure of structure to be tubular | atresia |