1
When you exhale, your lungs blow out
carbon dioxide
The body system that breaks down food
Digestive system
Pumps blood through the body
Heart
I protect your brain
skull
I am the liquid in your mouth that helps you break down food
saliva
I turn liquid waste into solid waste
large intestine
I protect your lungs and heart
ribs
How many organs are in your body?
50
Which muscle is located in your upper chest?
Pectoral muscle
I am the communication center that coordinates the body's actions and reactions
brain
What body system moves blood through your body?
Circulatory system
When you inhale, your lungs take in ______ ?
oxygen
What attaches your muscles to your bones?
tendons
Controls the direction the blood flows through the heart
valves
Carries blood *away* from the heart
arteries
What body system gives your body structure and protects delicate body parts?
skeletal system
How many kinds of tissues are there?
4
Carries blood *into* your heart
veins
Three types of muscles
smooth
cardiac
skeletal
Three main parts of the nervous system
brain
spinal cord
nerves
I send messages about movement back and forth to the spinal cord
motor nerves
In order from smallest to largest...
organ systems; cells; tissues; organs
cells
tissues
organs
organ systems
Five parts of the digestive system in order
mouth
esophagus
stomach
small intestine
large intestine
What transports messages around the body using chemical and electrical signals?
neurons
I carry messages about movement to and from the motor neurons to the brain.
nerves