The Human Body

Our class has been studying the human body. It is amazing! This is some of what we learned.

Cells
There are white blood cells and red blood cells.
Plant cells have a cell wall.
Plant cells have chloroplasts that make the food for the plant.
Animal cells have a membrane.
Plant cells walls are like cardboard and animal cell membranes are like plastic bags.


Eyeballs (Senses)
The iris controls the amount of light that comes into the eye.
The pupil is the part of the eye you see out of.
When your eye sees things it sees them upside down and the brain turns it back.
The color of the eye is something you inherit from your parents.
The eye is attached to the brain by the optic nerve.
Your pupil is clear, kind of like a cave...
When you squint it is how your eye focuses.
Everyone has a blind spot that their brain fills in for you.

Blood and Circulation
There are red and white blood cells.
White blood cells fight bacteria and germs.
Red blood cells carry oxygen.
Blood can be red or blue.
Blood is blue, then it gets oxygen from your lungs and turns red.
Red blood cells can live up to 4 months and white blood cells live up to two weeks.
The right side of your heart brings blood to the lungs and the left side pumps it to the rest of your body.
Your blood can rush out of your brain.

More about digestion tomorrow!!!!