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Chapter One Terms
Introduction to the Study of the Structure and Function of the Body
Question | Answer |
---|---|
abdominopelvic quadrants | health professionals divide the adomen (through the navel) into four areas to hep locate specific organs; Right upper, Left upper, Right lower, Left lower |
abdominopelvic regions | anatomists have divided the abdomen into nine regions to identify the location of organs; Right hypochondriac region, Epigastric region, Left hypochondriac region, Right lumbar region, Umbilical region, Left lumbar region, Right iliac (inguinal) region, H |
anatomical position | a reference position that gives meaning to the directional terms used to describe the body parts and regions; the body is in an erect or standing posture, with the arms at the sides and palms turned forward. The head and feet also point forward. |
anatomy | the study of the structure of an organism and the relationships of its parts |
atrophy | wasting away of tissue; decrease in size of a part; sometimes referred to as disuse atrophy |
abdominal cavity | the cavity containing the abdominal organs |
cranial cavity | space inside the skull that contains the brain |
pelvic cavity | the lower portion of the ventral cavity; the distal portion of the abdominopelvic cavity |
pleural cavity | a subdivision of the thorax |
spinal cavity | the space inside the spinal column through which the spinal cord passes |
thoracic cavity | chest cavity |
control center | the brain |
superior | higher; opposite of inferior |
inferior | lower; opposite of superior |
anterior | front or ventral; opposite of posterior or dorsal |
posterior | located behind; opposite of anterior |
ventral | of or near the belly; in humans, front or anterior; opposite of dorsal or posterior |
dorsal | referring to the back; opposite of ventral; in humans, the posterior is dorsal |
medial | of or toward the middle; opposite of lateral |
lateral | of or toward the side; opposite of medial |
proximal | next or nearest; located nearest the center of the body or the point of attachment of a structure |
distal | toward the end of a structure; opposite of proximal |
superficial | near the body surface |
deep | farther away from the body's surface |
effector loop | responding organ; for example, voluntary and involuntary muscle, the heart and glands |
experimentation | performing an experiment, which is usually a test of a tentative explanation of nature called a hypothesis |
feedback | a highly complex and integrated communication control network, classified as negative or positive; negative feedback loops are the most important and most numerous homeostatic control mechanisms |
homeostasis | relative uniformity of the normal body's internal environment |
hypothesis | a proposed explanation of an observed phenomenon |
mediastinum | a subdivision in the midportion of the thoracic cavity |
negative feedback | the most important and most numerous homeostatic control mechanism |
chemical | atoms and molecules |
cellular | the smallest "living" units of structure and function in our body |
tissue | an organization of many similar cells that act together to perform a common function |
organ | a group of several different kinds of tissues arranged so that they can together act as a unit to perform a special function |
system | an organization of varying numbers and kinds of organs arranged so that they can together perform complex functions for the body |
physiology | the study of body function |
sagittal | longitudinal; like an arrow |
midsagittal | a cut or plane that divides the body or any of its parts into two equal halves |
frontal | lengthwise plane running from side to side, dividing the body into anterior and posterior portions |
transverse | a horizontal or crosswise plane |
positive feedback | stimulatory; temporarily amplifies the change that is occurring |
prone | used to describe the body lying in a horizontal position facing downward |
sensor | collects information from the body and sends it to the control center |
supine | used to describe the body lying in a horizontal position facing upward |
theory | an explanation of a scientific principle that has been tested experimentally and found to be true; compare to hypothesis and law |