7.L.1.4 - Summarize the general functions of the major systems of the human body (digestion, respiration, reproduction, circulation, and excretion) and ways that these systems interact with each other to sustain life.

Major organs

blood vessels

heart

Function

transports nutrient

and waste

throughout the

body

Contributes to homeostasis by..

regulates & maintains correct levels

nutrients, oxygen, and waste

products needed by cells

Major organs

Mouth

Esophagus

Stomach

large and small

intestines

colon

Function

absorbs nutrients by breaking down food into usable

particles

Contributes to homeostasis by..

regulating the intake of

nutrients

breaking down food

molecules & absorbing them

into the cells

regulating water intake (large

intestine)

Major organs

Kidneys

Liver

Bladder

Colon

Rectum

Lungs

Skin

Function

removes waste from the body

Contributes to homeostasis by..

Removing all waste material from the

body Skin - sweats (which also helps to cool the body)

Kidneys- filter chemicals in the blood

Liver -filters toxins and acids from the blood

Colon- allows solid waste to pass from the body

Major organs

Lungs

Function

Moves oxygen into

the body while

removing carbon

dioxide (CO2) from

the body

Contributes to homeostasis by..

bringing in necessary levels of

oxygen while removing harmful

CO2

Major organs

bones

Function

protects and supports other body

systems

Contributes to homeostasis by..

supporting & keeping organs in

place

directly interacts with muscles

Includes

voluntary and involuntary muscles

Function

creates the force that enables the body to move & carry out different functions related to movement

Contributes to homeostasis by..

allowing movement & the

body to return back into

place after changing

position; many involuntary

muscles constantly regulate

body functions such as

breathing and heartbeat

Major organs

Glands

Brain

Function

regulates and sends hormones throughout the body

Contributes to homeostasis by..

Regulating hormone messages

such as temperature, hunger, sleep,

etc.

Major organs

Nerves

Brain

Functions

sends chemical messages

throughout the body

Contributes to homeostasis by..

sending chemical messages to

the brain that tell the status of

pain, temperature, hunger,

etc. so that the body can

make adjustments using other

systems

The immune system protects cells from microscopic invaders.

What four systems are involved in

regulating internal body temperature?

› nervous

› endocrine

› excretory

› circulatory