Skeletal System
The framework of the body.
skeleton
The process of breaking down food into nutrients.
digestion
The brain and spinal cord make up this system.
central nervous system
This is the fluid that carries oxygen and nutrients throughout the body.
blood
These are the main organs of the respiratory system.
lungs
The strongest bone in the human body.
femur
The part of the body where food enters and digestion begins.
mouth
These carry messages to and from the brain and spinal cord.
nerves
This organ pumps blood throughout the body.
This is the windpipe or tube that carries air to the lungs.
trachea
The skull protects this important organ.
brain
A large organ that stores and digests food.
stomach
The basic unit of the nervous system.
neurone
These blood vessels carry blood away from the heart.
Tiny balloons or air sacs in the lungs where gas exchange occurs.
alveoli
Another name for the collarbone.
clavicle
The longest organ in the digestive system.
small intestine
synapse
These blood vessels carry blood back to the heart.
veins
This dome-shaped muscle helps you breathe.
diaphragm
The number of bones in a human body.
206
The organ that removes waste from the body.
large intestine
The part of the body that helps us think and feel.
brain
Tiny blood vessels that connect arteries and veins.
capillaries
The gas that is exhaled by the body as a waste product.
carbon dioxide