Circulatory System
This system moves blood through your body to deliver oxygen.
Circulatory system
This system breaks down the food you eat into energy.
Digestive system
This system sends messages so you can think, feel, and move.
Nervous system
This system includes your bones and muscles working together.
Musculoskeletal system
When your heart beats, it creates this that you can feel in your wrist or neck.
Pulse
Most nutrients are absorbed in this long, winding organ.
The small intestine
This long bundle of nerves runs down your back.
The spinal cord
These hard structures give your body shape.
Bones
Your blood carries this gas that helps you breathe and stay alive
Oxygen
This organ mixes and breaks down food with acid.
The stomach
This organ is the control center of your body.
The brain
How many bones are there in our body
206
our heart pumps faster when you do this activity.
Exercise
Digestion begins in this part of your body.
The mouth
This system helps you think, feel, and react.
The nervous system
Which bone in human body is the biggest in size
Femur
How many sounds is one heartbeat
2
This organ makes saliva, which helps start digestion in your mouth.
Salivary glands
These tiny cells send messages like text messages inside your body.
Neurons (nerve cells)
This is where two bones meet — like your knee or elbow.
Joint