Download Organ Systems Working Together

3.5 – Organ Systems Working Together
 All
your cells are organized into tissues,
organs, and organ systems
 To keep your body healthy all of your
systems must work together
 For example: Digestive system gets nutrients
and circulatory system disperses the
nutrients around the body
 Organ systems can be divided into 2 main
groups:


Supplies nutrients and removes waste
Regulates the body
 There




are 4 main systems in this group
Respiratory System
Circulatory System
Digestive System
Excretory System
Look at Figure 1 on Page 78
 Consists
of the trachea, lungs, and blood
vessels that are contained within the lungs
 Responsible for absorbing oxygen from the
air and getting rid of carbon dioxide
 Oxygen is needed by all cells of the body to
carry out cellular processes
 Carbon dioxide is produced as waste in the
process
 The
exchange of gases takes place in the
blood vessels in the lungs
 These blood vessels connect the respiratory
system to the circulatory system
 The respiratory system relies on the
circulatory system to distribute the oxygen
throughout the body and take the carbon
dioxide back to the lungs
 Is
made of the mouth, esophagus, stomach,
intestines, and liver
 It is responsible for breaking down the food
we eat and making the nutrients available to
all the cells of the body
 This system also relies on the circulatory
system to distribute the nutrients to the cells
and to collect waste materials that are
produced in the process
 Consists
of the kidneys, bladder, ureters,
and urethra
 It collects waste from the bloodstream and
excretes it as urine
 The kidneys act as filters through which the
blood flows to be purified
 While filtering the waste, the kidneys also
regulate the amount of water in the body
 The excretory system ensures that our bodies
are not poisoned by the waste that is
produced in cells
 The
2 main systems that regulate the body
are:


Endocrine System
Nervous System
 The
endocrine system produces hormones
(chemical messengers)
 These hormones travel to other organs and
tell them how to adjust to what is going on
outside and inside the body
 The nervous system detects what is going on
outside and inside the body and sends
electrical messages throughout the body