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Anatomy
the study of the structure of the body
Physiology
the study of the function of the body
Chemical level
represents the atoms and molecules that make up cells (Consists of Atomic level and molecular level)
Cellular level
represents the basic unit of all living things
Tissue level
a group of cells with similar or common function
Organ level
a group of tissues with similar or common function
Organ system level
a group of organs with similar or common function
Organismic level
the entire body consisting of the various organ systems.
Integumentary System
controls body temperature & protects body from environmental hazards
Skeletal System
supports body, protects soft body parts, stores minerals, forms blood cells
Muscular System
movement, support and produces heat
Nervous System
controls immediate responses to stimuli
Endocrine System
controls long-term responses in body
Cardiovascular System
internal transport of nutrients, wastes, oxygen, carbon dioxide and cells
Lymphatic & Immune Systems
defense, immunity and returns lost fluids to cardiovascular system
Respiratory System
exchange of air and delivery of blood gases to/from tissues
Digestive System
ingestion, breakdown and absorption of food & elimination of indigestible wastes
Urinary System
filtration of blood to maintain proper water and salt balance and to eliminate waste products
Reproductive System
produces sex cells and hormones related to reproduction
homeostasis
condition in which body's internal environment remains within certain narrow physiological limits
homeostatic regulation
adjustment of physiological system to maintain homeostasis
receptor
monitors change in controlled condition (stimulus) and sends input to control center
control (integration) center
receives input from receptor & determines appropriate response
effector
cell or organ that receives information (output) from control center and produces a response (effect)
interactions of a feedback system
stimulus -> receptor -> input (afferent pathway) -> control center -> output (efferent pathway) -> response
positive feedback
the response by the effector to the initial change is to further exaggerate the change. Example in labor contractions, the contraction of the uterus forces the baby towards the birth canal, which
places pressure on the cervix; the pressure of the baby against the cervix causes uterine contraction, etc.
...
Negative feedback
the response by the effector to the initial change is to counter or reduce that change, thus bringing the system back to its "normal" state. Example When blood sugar level rises, the pancreas secretes
insulin which causes the cells of the body to take in glucose, thus removing glucose from the blood and lowering blood sugar level.
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Anatomical position
patient is erect, feet apart and palms facing anteriorly Cephalic = head
Cranial
upper portion of head surrounding brain
Facial
face
cervical
neck
thoracic
chest
axillary
armpit
acromial
point of shoulder
deltoid
fleshy portion of shoulder
brachial
upper arm
antebrachial
forearm
antecubital
front of elbow
carpal
wrist
manual
hand
digital (phalangeal)
fingers or toes
abdominal
region of trunk between diaphragm and pelvis
dorsal
back
lumbar
lower back
olecranol
back of elbow
pelvic
pelvis
pubic
anterior pelvis
inguinal
junction of trunk and thighs (groin)
gluteal
buttocks
femoral
thigh
patellar
front of knee
popliteal
back of knee
crural
anterior of lower leg (shin)
sural
posterior of lower leg (calf)
tarsal
ankle
pedal
foot
plantar
bottom of foot
superior (
cephalic = cranial) = towards the head
inferior (
caudal) = away from the head
anterior (ventral)
towards the front
posterior (dorsal)
towards the back
medial
towards the midline
lateral
away from the midline
proximal
towards the point of attachment (limbs)
distal
away from the point of attachment (limbs)
superficial
towards the surface (i.e., skin)
deep
away from the surface
Sagittal
separates the body into right and left parts
Midsaggital
median = separates the body into equal right and left parts
Parasaggital
separates the body into unequal right and left parts
Frontal
coronal = separates the body into anterior and posterior parts
Transverse
horizontal - cross-sectional -separates the body into superior and inferior parts
.
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dorsal body
The two major cavities of the body are the dorsal body cavity and the ventral body cavity.
ventral body
The organs in the ventral body cavity are surrounded by serous membranes which allow for organ movement. There are no serous membranes in he dorsal body cavity.
The dorsal body cavity
surrounds the brain and spinal cord.
It is separated into two subdivisions
the cranial cavity surrounds the brain and the spinal cavity surrounds the spinal cord.
The ventral body cavity
includes the thoracic cavity and the abdominopelvic cavity.
The thoracic cavity
is the cavity superior to the diaphragm and the abdominopelvic cavity is inferior to the diaphragm.
The thoracic cavity is further subdivided into
two pleural cavities, which contain the lungs, one pericardial cavity, which contains the
heart, and the mediastinum, which is the central region of the thoracic cavity containing the esophagus and trachea.
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The abdominopelvic cavity
is separated into two regions, which are not truly separated from one another in the
body.
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These are the abdominal cavity,
which contains primarily the digestive organs and the pelvic cavity, which contains primarily the reproductive and urinary organs.
Serous membranes (also called serosae)
are found within the ventral body cavity. They consist of two layers of membrane with fluid =(called serous fluid) in between the two layers.
The inner layer
which is closest to the organ, is
called the visceral layer.
...
The outer layer
which is closest to the body wall, is called the parietal layer.
Pleura
serous membranes surrounding lungs
parietal pleura
outer serous membrane surrounding lungs
visceral pleura
inner serous membrane surrounding lungs
Pericardium
serous membranes surrounding heart
parietal percardium
outer serous membrane surrounding heart
visceral pericardium
inner serous membrane surrounding heart
Peritoneum
serous membranes lining organs in the abdominopelvic cavity (surrounding digestive, reproductive and
urinary organs)
...
parietal peritoneum
outer serous membrane surrounding organs in the abdominopelvic region
visceral peritoneum
inner serous membrane surrounding organs in the abdominopelvic region