Chapter two Flashcards
Anatomic Reference System
describe the locations of the structural units of the body
= body plane
= body direction
= body cavity
= structural unit
Anatomy
study of the structures of the body
Physiology
study of the functions of the structure of the body
physi
nature or physical
Anatomic Position
standing up straight so that the body is erect and face forward
holding arms at the sides with hands turned so that the palms face the front
Body Planes
imaginary vertical and horizontal lines used to divide the body into sections for descriptive purposes
Vertical Plane
up-and-down plane that is at a RIGHT ANGLE to the horizon
sagittal
midsagittal
frontal
Sagittal plane
the vertical plane that divides the body into unequal left and right portions
Misaggital Plane
or midline
divide teh body into equal left and right portions
Frontal Plane
vertical plane that divides the body into anterior and posterior portions
or coronal plane
right angle to the sagittal plane
Horizontal Plane
flat, crosswise plane (horizon)
Transverse Plane
the horizontal plane that divides the body into superior and inferior portions at any level across the body
Body Direction Terms
describe the relative locations of sections of the body or of an organ
Ventral
front or belly side, of the organ or body
ventr
al
belly side of the body
pertaining to
Dorsal
refers to the back of the organ or body
Dors
al
back of the body
pertaining to
Anterior
situated in the front
front or forward part of the organ
(in reference to ventral)
anter
ior
front or before
pertaining to
Posterior
situated in the back or back part of an organ
poster
ior
back or toward the back
pertaining to
(in reference to posterior)
Superior
uppermost, above, or toward the head
Inferior
lowermost, below, or toward the feet
Cephalic
toward the head
Caudal
lower part of body
Caud
tail or lower part of the body
Proximal
situated nearest the midline or beginning of a body structure
Distal
situated farthest from the midline or beginning of the body structure
Medial
the direction toward or nearer the midline
Lateral
the direction toward or nearer the side of the body, away from the midline
Body Cavities
spaces that contain and protect internal organs
DORSAL
VENTRAL
Dorsal Cavity
located along the back of the body and head
contain organs of the nervous system that coordinate body function
CRANIAL
SPINAL
Cranial Cavity
located within the skull
surround and protect brain
cranial = pertaining to the skull
Spinal Cavity
located within the spinal column
surround and protect the spinal cord
Ventral Cavity
located along the front of body
contains organs that sustain homeostasis
thoracic cavity (chest cavity or thorax) abdominal cavity (abdomen) pelvic cavity
Homeostasis
processes through which the body maintains a constant internal environment
home = constant stasis = control
Thoracic Cavity
surround and protect heart and lungs
Diaphragm
muscle that separates the thoracic and abdominal cavities
Abdominal Cavity
contain organs for digestion
Pelvic Cavity
space formed by the hip bones
contain the organs for the reproductive and excretory system
Abdominopelvic cavity
refers to these two cavities as a single unit
there is no division between the abdomen and pelvic cavity
pelv
pelvis
inguinal
relating to the groin
refers to the entire lower area of the abdomen
groin
crease at the junction of the trunk with upper end of the thigh
What are the 9 regions of the thorax and abdomen
1/2 - right and left hypochondriac regions
= covered by lower ribs
3 - Epigastric Region
above the stomach
4/5 - right and left lumbar regions
= located near the inward curve of the spine
6 - Umbillical regions
= surround the umbilicus (belly button or naval)
= pit in the center of abdominal wall marks the point where umbilical cord was attached before birth
7/8 - right and left iliac regions
= located near the hip bones
9 - hypogastric region
= located below the stomach
chondr
cartilage
lumb
lower back
lumbar
describe the part of the back between the ribs and pelvis
ili
hip bone
What are the quadrants of the abdomen
describe where an abdominal organ or pain is located
RUQ
LUQ
RLQ
LLQ
Peritoneum
the multilayered membrane that protects and holds the organs in place within the abdominal cavity
membrane
thin layer of tissue that covers a surface, lines a cavity, or divides a space or organ
Layers of peritoneum
parietal peritoneum
= outer layer of the peritoneum that lines teh interior of the abdominal wall
mesentery
= fused double layer of the parietal peritoneum that attaches parts of the intestine to the interior abdominal wall
visceral peritoneum
= inner layer of the peritoneum that surrounds the organs of the abdominal cavity
visceral
relating ot the intenral organs
parietal
cavity wall
retroperitoneal
behind the peritoneum
retro
behind
periton
peritoneum
peritonitis
inflammation of the peritoneum
Structures of the body
cell
tissue
organ
body system
cells
basic structural and functional units of the body
specialized and grouped to form tissue and organ
cytology
study of the anatomy, physiology, pathology, and chemistry of the cell
cytologist
specialist in the study and analysis of cells
cell membrane
tissue that surrounds and protects the content of a cell from the external environment
cytoplasm
material within the cell membrane that is NOT part of the nucleus
plasm
formative material of cells
nucleus
surrounded by nuclear membrane
structure within the cell
- control activities of the cell
- help cell divide
stem cells
unspecialized cells that can renew themselves for long periods of time through cell division
= do not have a specialized role and do not die after a determined life span
what special thing can stem cells do
transform themselves into cells with special functions
cells of the heart muscle that make the heartbeat
cells of the pancreas that produce insulin
Adult Stem Cells
somatic stem cells
- undifferentiated cells among differentiated cells in a tissue or organ
- maintain and repair tissue in which they are found
differentiated
specialized function or structure
what is one main use of stem cells
- transplantation from one individual to another
- are harvested from HEMOPOIETIC (blood-forming) tissue of the donorś bone marrow
graft versus host disease
occurs when the match between a donor and recipient is not perfect, and there is a possibility of rejection
Embryonic stem cell
undifferentiated cell that may form into any adult cell
can proliferate indefinitely in a laboratory and provide a source for
- muscle
- liver
- bone
- blood cell
embryo
a developing child during the first 9 weeks in the womb
embryo = fertilized ovum
Describe an embryonic stem cell transplant
does not require a perfect match as the cell is primitive
Where do embryonic stem cells come from?
cord blood found in the umbilical cord and placenta of newborn infant
it is possible to get stem cells from cord blood without danger to the mother or child at the time of birth. the cells are kept frozen until necessary for treatment
What is another method of obtaining embyronic stem cells?
surplus embryos produced by in vitro (test-tube) fertilization.
usually kept for medicinal and scientific research
Gene
the fundamental physical and functional unit of heredity
control
= hereditary disorders
= physical traits
Genetics
study of how genes are transferred from parents to their children and the role of genes in health and disease
gene (word part)
producing
geneticist
a specialist of genetics
dominant gene
if inherited from either parent, the offspring will inherit that condition or disease
recessive gene
if inherited from both parents, the offspring will have that condition
if inherited from one parent, the offspring will not have that condition. the child will have the trait
sickle cell anemia
group of inherited red blood cell disorders that are transmitted by a recessive gene
genome
complete set of genetic information of an organization
Human Genome Project
studied the genetic code (genome) and found that it is more than 99% identical among human throughout the world
took 13 years to map the human genome, an was published in 2003
Why is the human genome important
helps in the study of the use of genetics in health and science.
they are now trying to understand the proteins encoded by the sequence of 30,000 genes
Chromosome
genetic structure located within the nucleus of a cell.
made up of DNA molecules containing the boyś genes
allows keeping genetic information neat, organized, and compact
one chromosome = 100,000 genes
somatic cell
any cell EXCEPT gametes
somatic = pertaining to the body
contain 46 chromosomes in 23 pairs.
22 identical pairs and the XX or XY pair
gamete (sex cell)
sperm or egg (ovum)
contains 23 single chromosomes which are passed on to the offspring for a total of 46
What determines gender
the X or Y chromosome from the father
Describe human DNA
deoxyribonucleic acid
located on the pairs of chromosomes in the nucleus of each cell
has an identical structure in all living organisms
contains thousands of genes that provide essential information regarding heredity, physical appearance, disease risk, etc..
Describe the structure of DNA
packaged in a chromosome as two spiraling strands that twist to form a double helix
helix
shape twisted like a spiral staircase
Where is DNA found
in the nucleus of all types of cells, except erythrocytes as they do not have nuclei
Who has identical DNA
identical twins
Genetic Mutation
change of the sequence of a DNA molecule
- usually due to radiation or environmental pollution
somatic cell mutation
change within the cells of the body
- are not transmitted to next generation
gametic cell mutation
change within the genes in a gamete
- can be transmitted to next generation
genetic engineering
the manipulation or splicing of genes for scientific or medical purposes
(e.g. the production of human insulin from modified bacteria)
Genetic Disorder
aka hereditary disorder
pathological condition caused by absent or defective gene
- may be obvious at birth OR manifest later in life
What are 6 genetic disorders
Cystic Fibrosis Down Syndrome Hemophilia Huntingtonś disease Muscular Dystrophy Phenylketonuria
Cystic Fibrosis
CF
present at birth and impacts the respiratory and digestive systems
Down Syndrome
caused by the presence of 3rd copy of 21st chromosome (trisomy 21)
characteristic facial appearance, learning disabilities, developmental delays, and physical abnormalities (heart valve disease)
Hemophilia
group of hereditary bleeding disorders in which a blood-clotting factor is missing
is a blood-coagulation disorder characterized by spontaneous hemorrhages or severe bleeding after an injury