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Medical Terminology Ch. 2 Terms
Ch.2 terms
149
Medical
Undergraduate 3
01/23/2011

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Term
Anatomic reference systems
Definition
Describe the location of the structural units of the body
Term
Anatomy
Definition
Study of the structures of the body
Term
Physiology
Definition
Study of the functions of the structures of the body
Term
Anatomic position
Definition
Standing up straight, erect and facing forward, arms at the side with the hands turned with the palms turned toward the front.
Term
Body planes
Definition
imaginary vertical and horizontal lines that divide the  body into sections for descriptive purposes
Term
Vertical plane
Definition
up and down plane
Term
Midsagittal plane
Definition
Midline, divides the body into equal left and right halves
Term
Sagittal plane
Definition
Unequal left and right portions
Term
Horizontal plane
Definition
Divides the body into upper and lower portions
Term
Transverse plane
Definition
Divides the body into upper and lower halves
Term
Ventral
Definition
front, belly side
Term
Dorsal
Definition
Back of the organ or body
Term
Anterior
Definition
Front, or toward part of an organ
Term
Posterior
Definition
Situated in the back, or back part of an organ
Term
Superior 
Definition
Uppermost, above, or toward the head
Term
Inferior
Definition
Lowermost, below, or toward the feet
Term
Cephalic
Definition
Toward the head
Term
Proximal
Definition
Nearest the midline or beginning of a body structure
Term
Distal
Definition
Farthest from the midline, or beginning of a body structure 
Term
Medial
Definition
Toward or nearer the midline
Term
Lateral
Definition
Toward or nearer the side, away from the midline
Term
Body cavities
Definition
Spaces within the body that contain and protect internal organs
Term
Dorsal cavity
Definition
back of the body and heads, contains organs of the nervous system which coordinates body functions.
Term
Cranial cavity
Definition
within the skull and surrounds and protects the brain
Term
Spinal cavity
Definition
Within the spinal column, surrounds and protects the spinal cord
Term
Ventral cavity
Definition
Front of the body, contains organs that maintain homeostasis 
Term
Homeostasis 
Definition
Maintain a constant internal enviorment
Term
Thoracic cavity
Definition
also known as chest cavity or thorax, protects heart and lungs
Term
Diaphragm
Definition
Muscle that separates the thoracic and abdominal caivity
Term
Abdominal cavity
Definition
contains major organs of digestion.  Frequently refereed to as the abdomen.
Term
Pelvic cavity
Definition
space formed by the hip bones, contains organs of reproduction and excretory systems
Term
Abdominopelvic cavity
Definition
The abdominal and pelvic cavity as one unit
Term
Inguinal
Definition
Relating to the groin, entire lower area of the abdomen
Term
Groin
Definition
Crease at the junction of the trunk with the upper end of the thigh 
Term
Hypochondriac regions
Definition
Left and right sides, covered by the ribs
Term
Epigastric region
Definition
Located above the stomach
Term
Lumbar regions
Definition
Left and right sides, near the inward curve of the spine
Term
Lumbar
Definition
Part of the back between the ribs and pelvis 
Term
Umbilical region
Definition
Surrounds the umbilicus, also known as the belly button or navel
Term
Iliac regions
Definition
Left and right sides over the hip bones
Term
Hypogastric region
Definition
Below the stomach
Term
Quadrant
Definition
Divided into four
Term
Peritoneum
Definition
Multilayerd membrane that protects and holds the organs in place within the abdominal cavity
Term
Membrane
Definition
Thin layer of tissue that covers a surface, lines a cavity or divides a space or organ
Term
Parietal peritonuem
Definition
Outer layer of the peritonuem that lines the interior of the abdominal wall
Term
Parietal
Definition
Cavity wall
Term
Mesentery
Definition
Fused double layer of the parietal peritoneum that attches parts of intestine to the interior abdominal wall
Term
Visceral paritoneum
Definition
Inner layer of the peritoneum that surrounds the organs of the abdominal cavity
Term
Viceral
Definition
relating to the internal organs
Term
Retroperitoneal
Definition
Behind the peritoneum
Term
Peritonitis
Definition
Inflammation of the peritoneum
Term
Cells
Definition
Bacis structural and functional units of the body.  Specialized and grouped together to form tissue and organs
Term
Cytology
Definition
Study of the anatomy, physiology, pathology and chemistry of a cell
Term
Cell membrane
Definition
Tissue that surrounds and protects the contents of the cell by seperating them from its external enviroment
Term
Cytoplasm
Definition
Material within the cell membrane that is not part of the nucleus
Term
Nucleus
Definition
Surrounded by the nuclear membrane, controls activites of the cell, and helps cell to divide
Term
Stem cells
Definition
unspecialized, renew themselves for long periods of time by cell division.  Can be transformed into cells with special functions
Term
Adult stem cells
Definition
Somatic stem cells, undifferentiated cells found among differentiated cells in a tissue or organ.  Maintain and repair tissue
Term
Graft versus host disease
Definition
Rejection of stem cells becuase donor and recipiant arent a perfect match
Term
Embryonic stem cells
Definition
undifferentiated cells, ability to form any adult cell.  Does not require perfect match, more primative
Term
Cord blood
Definition
Where embryonic stem cells come from found in unbilical cord and placenta
Term
Gene
Definition
Physicla function unit of heredity
Term
Genetics
Definition
Study of how genes are transfered from partents to their children, and role of genes in health and disease.
Term
Geneticist
Definition
Specialist in the feild of genetics
Term
Dominant gene
Definition
Inhereited from either parent, will inherit the genetic condition
Term
Recessive gene
Definition
Inherited from both parents , will have the condition
Term
Sickle cell anemia
Definition
group of inhereited red blood cell disorders
Term
Genome
Definition
Set of genetic information of an individual
Term
Chromosome
Definition
genetic structures located within the nucleus of each cell, made up of DNA.  Keeps information neat, organized, and compact
Term
Somatic cell
Definition
Any cell in the body except the gamets (sex cells), pertaining to the body in general
Term
Sex cell
Definition
sperm or egg, all known as a gamete, only type of cell that does not contain 46 chromosomes
Term
DNA
Definition
Deoxyribonucleic acid, located on pairs of chromosomes in the nucleus, information essential fir heredity, apperance, disease
Term
Helix
Definition
shape twisted like a spiral staircase
Term
Double helix
Definition
Two strands twisted together
Term
Genetic mutation
Definition
Change of the sequence of a DNA molecule, caused by radiation exposure, or polluion
Term
Somatic cell mutation
Definition
Change within the cells, affect the individual but cant be transmitted
Term
Gametic cell mutation
Definition
Change within the genes in gamet or sex cell, can be transmitted
Term
Genetic engineering
Definition
manipulating of splicing of genes for scientific or medical purposes
Term
Huntington's disease
Definition
Genetic disorder that is passed from parent to childen.  Nerve degeneration with symptoms appearing in midlife.  Eventually results in uncontrolled movments, and lost of mental abilities
Term
Genetic disorder
Definition
Also known as a hereditary disorder, is a pathological condition caused by an absent or defective gene
Term
Cystic fibrosis
Definition
Present at birth and affects the respitory and digestive system
Term
Down syndrome
Definition
Genetic variation, characteristic facial apperance, learning disabilities, and physical abnormalities
Term
Hemophilia
Definition
Group of hereditary bleeding disorders, blood clotting factor is missing
Term
Muscular dystrophy
Definition
Genetic disorder, progressive weakness and degeneration of the skeltal msuucle that control movements
Term
Phenylketuria
Definition
PKU, genetic disorder, digestive enzyme phenylalanine hydroxylase is missing.
Term
Tay-Sachs disease
Definition
Fatal genetic disorder, harmful quantities of a fatty substance buildup in tissues and nerve cells in the brain, both parents must carry it.
Term
Tissue
Definition
group or layer of similarly specialized cells that join together to perform specific functions
Term
Histology
Definition
Study of the structure, composition and function of tissue
Term
Histologist
Definition
Specialist in the study of the organization of tissues at all levels
Term
Epithelial tissues
Definition
Protective covering for all the internal and external surfaces, also form glands
Term
Epithelium
Definition
Specialized epithelial tissue that forms the epidermis of the skin, and the surface layer of the mucous membranes
Term
Endothelium
Definition
Lines the blood and lymph vessels, body cavities, glands and organs
Term
Coonective tissue
Definition
Support and connect organs and other body tissue
Term
Dense connective tissue
Definition
Bone and cartilage, from joints and frame
Term
Adipose tissue
Definition
Fat, provides protective padding, insulation and support
Term
Loose connective tissue
Definition
Surrounds various organs and supports both nerve cells and blood vessels
Term
Liquid connective tissue
Definition
Blood and lymph, transport nutrients and waste products thoughout the body
Term
Muscle tissue
Definition
Cells with ability to contract and relax
Term
Nerve tissue
Definition
ability to react to stimuli and to conduct electrical impulses
Term
Aplasia
Definition
Defective development, congenital absence of an oragan or tissue
Term
Hypoplasia
Definition
incomplete development of an organ or tissue, deficiency in the number of cells
Term
Anaplasia
Definition
Change in the structure of cells, orientation to each other
Term
Dysplasia
Definition
Abnormal development or growth of cells, tissues or organs
Term
Hyperplasia
Definition
Enlargment of an organ or tissue of becuase of increase in the number of cells in the tissue
Term
Hypertrophy
Definition
Increase in the bulk of a body part or organ, due to increase in size, but no in the number of cells in the tissue
Term
Gland
Definition
Specialized epithelial cells, capable of producing secretions
Term
Exocrine glands
Definition
sweat glands, secrete chemical substances into ducts that lead to organs or out of the body
Term
Endocrine glands
Definition
produce hormones, dont not have ducts, secreted directly into bloodstream
Term
Geriatric
Definition
Study of medical problems and care in the aged, also known as gerontology
Term
Geriatrician
Definition
Specializes in the care of older people, also known as gerontologist
Term
Premature birth
Definition
Earlier than 37 weeks of development, breathing difficulties and heart problems are common
Term
Birth injuries
Definition
congenital disorder, not present before the events surrounding the time of birth.
Term
Cerabal palsy
Definition
results of brain damage, caused by premature birth or inadequate oxygen to brain during the birthing process
Term
Adenitis
Definition
inflammation of the gland
Term
Adenocarcinoma
Definition
malignant tumor that originates in glandular tissue
Term
Malignant
Definition
harmful, capable of spreading, life threatening
Term
Adenoma
Definition
Benign tumor that arises, or resembles glandular tissue
Term
Adenomalacia
Definition
abnormal softening of a gland
Term
Adenosis
Definition
Any disease of condition of a gland
Term
Adenosclerosis
Definition
Abnormal hardening of a gland
Term
Adenectomy
Definition
Surgical removal of a gland
Term
Organ
Definition
Independent part, performs a specific function
Term
Pathology
Definition
Study of the nature and cause of disease that involves changes in structure and function
Term
Pathologist
Definition
specializes in labratory analysis of tissue samples to confirm or establish a disnosis
Term
Postmortem
Definition
after death
Term
Autopsy
Definition
postmortem examination
Term
Etiology
Definition
Study of the causes of dieases
Term
Communicable disease
Definition
contagious disease, transmited from one person to another, direct or indirect contact
Term
Indirect contact transmission
Definition
infected by contact with contaminated surface
Term
bloodborne transmission
Definition
through contact with blood or other body fluids that are contaminated with blood
Term
Airborne transmission
Definition
Contact with contaminated respitory droplets, spread by a cough or sneeze
Term
foodborne and waterborne transmission
Definition
Fecal-oral transmission, eating or drinking contaminated food or water, not been properaly treated to remove pathogens
Term
Vector-borne transmission
Definition
Due to bite by a vector, insects or animals
Term
Epidemiologist
Definition
Specialist in the study of outbreaks of disease within a population group
Term
Endemic
Definition
Ongoing presence of a disease within a population
Term
Epidemic
Definition
Disease within a specific population
Term
Pandemic
Definition
outbreak over a large geographic region, possibly worldwide
Term
Functional disorder
Definition
no physiological or anatomical cause can be identified
Term
Iatroggenic illness
Definition
unfavorible response due to prescribed medical treatment
Term
Idiopathic disease
Definition
Illness without known cause
Term
Infectious disease
Definition
caused by living pathogenic organisms, bacteria
Term
Nonsocmial
Definition
Disease aquired in a hospital or clincal setting
Term
Organic disorder
Definition
Caused by a dectable physical change in body
Term
Congenital disorder
Definition
Disease that exists at the time of birth
Term
Developmental disorder
Definition
birth defect, result in an anomaly or malformation
Term
Anomaly
Definition
Deviation from what is regarded as normal
Term
Atresia
Definition
congenital absence of a normal opening, or failure of a structure to be tubular
Term
Prenatal influences
Definition
mopthers health, behavior, and medical care that she does or doesnt recieve before delivery
Term
Fetal alcohol syndrome
Definition
Caused by mothers consumption of alcohol during pregnancy,growth abnormalities, mental retardation, brain damage, and socialization difficulties
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