What is the smallest unit of a living thing?
cell
the name of the process that cells use to replicate or copy themselves
cell division
Name three reasons cells divide
growth, repair, reproduction
what is the name of the organ system that digests and absorbs nutrients
digestive system
what is the name of this system?
Digestion, breaking down food into small pieces, starts in this part of the digestive system
mouth
The wind pipe is called the _______________________
trachea
The organ that pumps blood around the body is called the
heart
Which blood vessel takes blood away from the heart?
arteries
Which type of blood vessel takes blood to the heart?
veins
The part of the heart that makes sure there is no back flow
arteries
ventricles
valves
atria
The part of the heart that pumps blood to the lungs
left atria
right ventricle
right atria
left ventricle
