Body Systems Vocabulary

Important concepts to know from the body systems packets 1 and 2 

HOMEOSTASIS: When your body maintains a stable environment inside the body, even when things on the outside of the body are changing.

Cells need NUTRIENTS and OXYGEN and they need to get rid of WASTES in order to survive.

Cells must do many jobs so they form groups of similar cells to help with the jobs in the body.  These groups are called TISSUES.

In the body of complex organisms, the tissues cannot do all the jobs alone.  Tissues word together to form and ORGAN.

An organ works together with otehr organs to perform a specific job, such as digestion.  These organs working together are called ORGAN SYSTEMS.

CELLULAR RESPIRATION takes place in the MITOCHONDRIA.  The ingredients for ENERGY are...


Alveoli = tiny air sacs of the lungs where oxygen and carbon dioxide are exchanged.

The role ENZYMES play in digestion = break NUTRIENTS into smaller particles the body can use.  SPEED UP CHEMICAL REACTIONS

There are 10 major body systems and their functions are as follows:

body systemfunctionexplanation
Skeletalprotectionbones protect our organs (ribs protect heart and lung, vertebrae protect spine, skull protects brain)
 storagebones store minerals that help your nerves and muscles funtion properly
 movementskeletal muscles pull on bones to produce movement
 blood cell formationbone marrow is a special material that makes blood cells
 3 types of musclesfunction
Muscularskeletal muscleattached to bones, enables bones to move
 smooth musclefound in digestive tract, moves food through digestive system
 cardiac musclefound in heart, pumps blood around the body
Integumentary (skin)keeps water in your body and forein particles out
 lets you feel things around you
 helps regulate your body temperature
 helps get rid of waste (water-sweat)
Cardiovascularhelps maintain HOMEOSTASIS
 helps in regulation by carrying chemical signals (hormones) throughout the body 
Lymphatica group of organs and tissues that collect the excess fluid and return in to your blood.  Also helps fight pathogens 
RespiratoryTakes in oxygen and gets rid of carbon dioxide
Digestivedigests food so it can be used by the body
Urinary Removes waste products from the blood
NervousGathers and interprets information from inside the body and from the world outside the body 
 responds to the information as needed
Endocrineregulates growth, development, and homeostasis