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Seite 1

hierarchy of body organization

atom - molecule - macromolecule - organelle - cells - tissues - organs - organ system - organism

Foul major animal tissues CEMN

Connective Epithelial Muscle Nervous

Functions

Connective: binds and supports body parts

Epithelium: covers body surfaces and line body cavities

Nervous: enables responses to stimuli and coordinates body functions

-contains glial cells (glia): help nourish, insulate, replenish neurons

Muscle: enables movement of structure within the body and movement of entire animal

-skeletal: voluntary movements

- smooth: involuntary activities

- cardiac muscle: forms the contractile wall of the heart

Regulating and Conforming

regulator: internal mechanism is used to control internal change due to external fluctuation

conformer: allow internal condition to change with external change

interstitial fluid: the fluid that surrounds body cells

homeostasis - steady condition

set point - receiving stimulus at receptor (sensor) - response

negative feedback: a control mechanism that reduce the stimulus

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thermoregulation: the process by which animals maintain internal temperature within a normal range

endothermic: warmed mostly by heat generated by metabolism

ectothermic: gain heat from external sources

heat exchange between organism and its environment RECC

radiation: emission of electromagnetic waves,

evaporation: removal of heat from the surface of a liquidz