Cells in Organisms
Neuron
Sends messages from brain to move up
Leukocyte
keeps the tissues involved free of disease
Erythrocyte
keeps tissues involved alive, provides oxygen for energy for motion
Functioning Organism
must possess interrelated systems; can be unicellular; can be plant or animal
Kidney, heart, stomach, liver,
Organ
Algae, frog, rabbit
Organism
System Level
Organisms at this level have their cells arranged into systems
Tissue Level
Organisms at this level have their cells arranged into tissues
Cellular Level
Organisms in this level are either unicellular or colonial
Colonial
Organisms that live in a group called a colony
What process does some leukocytes absorb entire bacteria?
Phagocytosis
Organ Level
A degree of organism complexity. Organisms at this level have their cells arranged into organs
Organism
A functional plant or animal, existing through the cooperative organization of interrelated systems;
System
A group of organs working together for a common purpose
Organ
A group of tissues working together as a unit
Excretion
A system operation in amoeba
Muscle Fiber
A very long, contracting cell
Tissue
Cells working together to perform a particular task
Amoeba, paramecium, euglena
Cellular (1)
Colonial organisms
Cellular (2)
Respiratory, digestive
System
Organism Level
The highest level of complexity of a living thing
Specialization
The limiting of the function of a cell to a specific function; multicellular organisms exhibit a division of labor among cells
Division of Labor
The work being divided up into specialized tasks
Muscle, fat, bone
Tissue