Body Systems and Major Organs
This large organ pumps blood continuously through your entire circulatory system.
heart
These specialized nerve cells are the basic building blocks of the nervous system that transmit electrical signals.
Neurons
These cells contain hemoglobin and carry oxygen from your lungs to the rest of your body.
red blood cells
These curved bones in your chest form a protective cage around your heart and lungs.
ribs
This marine creature has 3 hearts, blue blood, and no bones at all.
Octopus
These two sponge-like organs in your chest extract oxygen from the air you breathe in.
lungs
This vital sign measures how many times your heart beats in one single minute (BPM).
heart rate
small proteins in your blood that help distinguish blood types
antigens
Located in your upper leg, this is the longest, strongest bone in the human body.
femur
More than half of all the bones in your entire body are located in just these four body parts. (2 answers)
hands and feet
This body system is responsible for breaking down food, absorbing nutrients, and getting rid of solid waste.
digestive system
Respiration rate measures how many times a person does this in one minute.
breathes
These specialized blood cells act as immune system soldiers to fight off infections, bacteria, and viruses.
white blood cells
Tough, flexible connective tissue found in joints (like your knees) and forming structural shapes like your nose and ears.
cartilage
Which is the only substance on Earth that can exist in all three phases of matter (solid, liquid, gas)?
Water
These two bean-shaped organs filter waste and extra fluid out of your blood to produce urine.
kidneys
When you accidentally touch something super hot, your body pulls your hand back automatically. This automatic reaction is called a...
reflex
Known as the "universal donor," this specific ABO blood type can be safely given to almost any patient in an emergency.
Type O
Red blood cells are manufactured deep inside bones within this soft, spongy tissue.
red bone marrow
Bananas are naturally slightly radioactive because they contain high levels of this essential chemical element/mineral.
potassium
This is the largest organ in the entire human body, acting as your first line of defense against germs.
skin
Even though your brain doesn't have muscles, it gets exhausted after studying hard because it uses up massive amounts of this simple sugar carried in your blood.
glucose
The medical condition where a person doesn't have enough healthy red blood cells or iron, causing them to feel tired.
anemia
The type of joint found in your shoulder and hip that allows movement in every single direction.
ball and socket joint
These sea creatures don't have brains, hearts, blood, or bones, and their bodies are about 95% water.
Jellyfish