Human Body Systems

basic biological unit of living organisms, containing a nucleus and variety of organelles enclosed by membranes

a group of similar cells specialized to perform a specific function

a part of the body formed of two or more tissues that performs a specialized finction

a group of organs that work together to perform a vital body function

an individual living thing

the science of the structure of living organisms

the science of the functioning of living organisms

toward the head end or upper part of the body, above

away from the head end or toward the lower part of the body, below

toward or at the front of the body, in front of

toward or at the backside of the body, behind

toward or at the midline of body, on inner side of

away from midline of the body, on outer side of

between a more medial and a more lateral structure

close to the origin of the body part or the point of attachment

farther from the origin of a body part or the point of attachment

toward or at the body surface

away from the body surface, more internal