.
They depend on each other
They are separate from one another
their relationship is difficult to understand
They do not interact with one another
Nervous system
Digestive system
Muscular system
Cardiovascular system
The circulatory system
The reproductive system
The muscular system
The skeletal system
Lungs
Stomach
Hand
Brain
Nervous system
Circulatory system
Digestive system
Skeletal system
Respiratory system
Muscular system
Nervous system
Circulatory system
Endocrine and excretory systems
Excretory and muscular systems
Muscular and digestive systems
Nervous and endocrine systems
Muscular and endocrine systems
Nervous and digestive systems
Nervous and circulatory systems
Circulatory and digestive systems
It prevents heat from entering his body.
It causes evaporation and carries away body heat.
It washes off bacteria off his skin.
It causes evaporation and saves body heat.
One or more cells
Chloroplasts
Independent movement
A skeletal system
Nervous system
Immune system
Digestive system
Endocrine system
Arteries
Brain
Heart
Capillaries
Rapid heartbeat
Sweating
Shallow breathing
Blinking
Moves blood through the arteries
Causes the lungs to expand
Sends nerve messages to the brain
Allows movement of the muscles
Integumentary and muscular systems
Skeletal and reproductive systems
Respiratory and circulatory systems
Digestive and nervous systems
Feeling tired after eating a meal
Movement of a person's arm
Healing of a cut on the arm
Increased production of hormones
Skeletal and circulatory systems
Digestive and nervous systems
Circulatory and digestive systems
Muscular and skeletal systems
Removing excess carbon dioxide
Stimulating the production of heat hormones
Causing cells to hold in more water
Causing involuntary muscle contractions
Keeping the body's temperature normal
Excreting wastes
Killing disease-causing organisms
Breaking down food into useable molecules
Carbon dioxide
Oxygen
Nitrogen
Hemoglobin
Integumentary and endocrine systems
Endocrine and excretory systems
Nervous and endocrine systems
Endocrine and circulatory systems
Wait!
Here's an interesting quiz for you.