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17 Cards in this Set

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Common unit of measurement for human cell
1 micrometer (um)=10^-6m
1 nanometer (nm)=10^-9m
Common unit of measurement for body weight
1 kilogram=2.2lbs
normal weight=60-70kg or 130-150lbs
Nanometer
"typical molecule" size= 1 thousandth of length of bacterium
Nanotechnology
new science- generally defined as study and manufacture of structures and devices with dimensions of about size of molecule
Normal size range for human cells
(diameter) 7-20um
Exceptions to size for human cells
(diameter)
human egg= 200um
neuron=10um to 1 m
muscle cell= 10-100um
liver cell= 100um
Tissue
group of cells that possess similar structures, shapes, and functions
Organ
large groups of cells consisting of 1 or more tissues organized into a unit which carry out a specific function
System
composed of several organs which have common function or functions
Tissue (example)
epithelial, shape=rectangular or circular, functions= protection,secretion, absorption, locations= skin, linings of body cavities, arteries, veins and other tubular structures
Organ (example)
liver consists of epithelial tissue
System (example)
digestive= stomach, intestines, liver, pancreas
function= digest and absorb
Homeostasis
maintenance of the internal environment
Physiological functions of skeletal system
protection of organs, site of synthesis and maturation of erythrocytes, leukocytes, and platelets, storage site for calcium
Bone Salt
primarily calcium carbonate
Bone matrix
primarily collagen
Intercellular matrix of bone
contains osteoblasts, osteocytes, and osteoclasts