1. Multi-celled organisms only
Body systems
Multi-celled organisms only

2. Body system
Job
Organs involved
Excretory
Remove wastes
Kidneys (remove urine)
Lungs (remove CO2)
Sweat glands (remove heat)
Respiratory
Gas exchange (O2 in, CO2 out)
Lungs
Nervous
Controls body functions
(thoughts, feelings, emotions, movement…)
Brain, spinal cord, nerves
Circulatory
Transports food, O2 and wastes
Blood, veins, arteries, capillaries, heart
Lymphatic
Removing excess water, cell debris, and wastes
Lymph, lymph vessels, lymph nodes
Skeletal / muscle
Strength, support, movement
Bones, muscles, and connective tissues (ligaments and tendons)