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Skeletal System
Digestive System
Respiratory System
Excretory System
Circulatory System
100
This part of the skeleton is composed of several bones and protects the brain.
What is the skull?
100
These structures, also part of the skeletal system, crush that has entered the mouth.
What are the teeth?
100
These balloon like sacs that inflate and deflate, bringing air into and out of the body.
What are the lungs?
100

The main organ of this body system

What is the kidneys?

100
These disc shaped cells transport oxygen from the lungs to the other parts of the body.
What are red blood cells?
200
The leg bone which connects to the hip.
What is the femur?
200
Food travels down this long tube from the mouth to the stomach.
What is the esophagus?
200
Small sacks in the lungs which allow oxygen and carbon dioxide to move between the lungs and blood stream.
What are aveoli?
200

This tube carries urine from the kidneys to the bladder.

What are the ureters?

200
Double Jeopardy: These blood cells are a vital part of the body's immune system.
What are white blood cells?
300
The connection between the humerus an scapula in humans is this kind of joint.
What is a ball and socket joint?
300
The millions of tiny finger-shaped structures that cover the inner surface of the small intestine and provide a large surface area through which digested food is absorbed.
What are the villi?
300
This chemical is in the air we breathe and we need it to survive.
What is oxygen?
300

The process by which the kidneys filter out excess ions, waste, and water from the blood to form urine is called this.

What is filtration?

300
The chamber in the heart that pushes blood out of the heart and to the other parts of the body.
What is the ventricle?
400
The internal, and spongy, portion of the bone that produces blood cells.
What is the marrow?
400
Double Jeopardy: This chemical aids in digestion by speeding up chemical reactions.
What is an enzyme?
400
This chemical is exhaled by animals, but plants "breathe" it in and use it to produce oxygen.
What is carbon dioxide?
400

The excretion of this substance is the primary method by which the body gets rid of excess nitrogen, which is a byproduct of protein metabolism.

What is urea?

400
Part of the circulatory system and a vital part of the immune system that carries a clear fluid called lymph towards the heart.
What is the lymphatic system?
500
The term of the vestigial tail found in humans.
What is the coccyx?
500
The name for the soft tissue that hangs down in the back of the mouth.
What is a uvula?
500
A disease in the lungs caused by breathing in harmful chemicals.
What is emphysema (or lung cancer)?
500

This process in the kidneys involves the movement of substances like glucose, water, and ions from the filtrate back into the bloodstream.

What is reabsorption?

500
These chambers bring blood into the heart from elsewhere in the body.
What are the atria (singular: Atrium)?