BODY SYSTEMSINTRO NOTES

DIGESTIVESTRUCTURES

• MOUTH: BEGINNING OF DIGESTION

• STOMACH: ACIDS AND MUSCLES BREAK DOWN FOOD

• SMALL INTESTINE ABSORBS NUTRIENTS FROM FOOD

• LARGE INTESTINE ABSORBS WATER

FUNCTION

• BREAKS DOWN FOOD INTO SUBSTANCES THAT CELLS CAN ABSORB AND USE.

CIRCULATORY

STRUCTURE

• HEART: MUSCLE THAT PUSHES BLOOD THROUGH ARTERIES

• ARTERIES: CARRY BLOOD AWAY FROM HEART THE HAS OXYGEN AND NUTRIENTS

• VEINS: CARRY BLOOD TO THE HEART THAT IS LOW IN OXYGEN AND HIGH IN WASTE

FUNCTION

• DELIVERY SYSTEM OF THE BODY. IT DELIVERS NUTRIENTS AND OXYGEN THROUGHOUT THE BODY CELLS AND PICKS UP WASTE.

RESPIRATORY

STRUCTURE

• LUNGS TAKE IN OXYGEN INTO THE BODY AND RELEASE CARBON DIOXIDE

• DIAPHRAGM MUSCLE THAT FORCES THE LUNGS TO EXPAND AND CONTRACT AND BRING AIR INTO AND OUT OF THE LUNGS.

FUNCTION

• BRINGS OXYGEN INTO THE BODY AND REMOVES CARBON DIOXIDE.

EXCRETORY

STRUCTURE

• KIDNEYS IS A FILTER FOR THE BLOOD

• INCLUDES THE SWEAT GLANDS, THE LUNGS, THE KIDNEY SYSTEM, URINARY SYSTEM AND OTHERS.

FUNCTION

• DISPOSES OF WASTES AND CONTROLS BODY FLUID LEVELS

IMMUNE

STRUCTURE

• INCLUDES WHITE BLOOD CELLS THAT FIGHT BACTERIA AND VIRUSES

FUNCTION

• FIGHTS INFECTION AND ILLNESS. INCLUDES THE WHITE BLOOD CELLS

SKELETAL

STRUCTURE

• BONES, CARTILAGE, LIGAMENTS, TENDONS

FUNCTION

• PROVIDE SUPPORT AND STRUCTURE TO THE BODY

• BLOOD CELLS ARE MADE IN BONE MARROW

MUSCULAR

STRUCTURE

• MUSCLES INCLUDING VOLUNTARY AND INVOLUNTARY

FUNCTION

• ALLOW MOVEMENT OF BONES AND BODY PARTS BY WORKING WITH THE NERVOUS AND SKELETAL SYSTEMS

NERVOUS

STRUCTURE

• BRAIN, SPINAL CORD, NERVES

FUNCTION

• RECEIVES STIMULI FROM INSIDE AND OUTSIDE OF THE BODY AND RESPONDS TO CHANGE

• MAINTAINS HOMEOSTASIS WHICH IS THE REGULATION OF STEADY, LIFE-MAINTAINING CONDITIONS BY ALL OF THE BODY SYSTEMS

INTEGUMENTARY

STRUCTURE

• INCLUDES SKIN (LARGEST ORGAN OF THE BODY), HAIR, AND FINGERNAILS

FUNCTION

• THE SKIN PROTECTS AND PROVIDES A BARRIER TO KEEP OUT FOREIGN MATERIALS AND TO PREVENT THE BODY FROM DRYING OUT.

ENDOCRINE

STRUCTURE

• GLANDS AND HORMONES

FUNCTION

• REGULATES BODY FUNCTIONS THROUGH CHEMICAL MESSENGERS CALLED HORMONES, CONTROLS THINGS SUCH AS HOMEOSTASIS, DEVELOPMENT, AND GROWTH

REPRODUCTIVE

STRUCTURE

• FEMALE: OVARIES, UTERUS, VAGINA

• MALE: TESTIS, PENIS, SCROTUM

FUNCTION

• PERFORMS REPRODUCTION, CONTROLS MALE AND FEMALE FUNCTIONS AND BEHAVIORS