The system where lungs absorb oxygen and release carbon dioxide.

Heart pumps blood through all of your blood vessels in this system.

System where females produce eggs and nourish/protect the fetus; males produce and deliver sperm.

System where kidneys remove wastes from the blood and regulate your body's fluids.

System where leaked fluid is returned to blood vessels and also helps get rid of bacteria and viruses.

System that includes the brain, spinal cord, and nerves; receives and sends messages throughout your body.

Two systems that work together to help you move and provide a framework to support and protect your body parts.

In order to survive, our body systems work independently from one another to avoid any complications.

Many organs are part of more than one body system.

Cells communicate by

The maintenance of a constant internal environment when outside conditions change is

Bacteria, viruses, fungi, and parasites are different forms of

Some bacteria are necessary and helpful to humans

Common cold, influenza, measles, chicken pox, and COVID-19 are caused by

Viruses cannot reproduce on their own.

__________ are used to treat bacterial infections and ___________ are used to fight off viral infections.

An organism that lives on and receives food from a host organism

Single-celled organisms capable of multiplying enter humans by being bitten by an infected insect are called

_______________ are usually large enough to be viewed without a microscope and include flat worms and roundworms.

___________ attach or burrow into the skin and include ticks, fleas, and lice.