Can We Control It?

Science Lesson 7

Did you know…

Which leads me to the point of this lesson…

• Stand up.• Sneeze.• Walk• Get goosebumps on your arm.• Raise a hand.• Make your blood stop pumping.• Make your stomach growl.

Can you….Can you….

Stand up

Sneeze

Walk

Get goosebumps on your arm

Raise a hand

Make your blood stop pumping

Make your stomach growl

CAN Control Can’t Control

VoluntaryVoluntary vs. Involuntary Muscles

Voluntary vs. InvoluntaryInvoluntary Muscles

• The heart is a bag of muscle that squeezes itself about once every second, sending blood flowing throughout the body.

• Your heart has 2 sides: left & right, separated by a thick, muscular wall.

•The heart contracts & relaxes, which means it is a ___________________.

•When your cardiac muscle contracts, it squeezes blood out of the heart through the arteries.

•When it relaxes, the veins fill you’re your heart with more blood.

1. Hold your left hand in front of you, palm up.2. Place first 3 fingertips of your right hand on

the inside of your left wrist in the groove below the base of the thumb.

3. Use the timer/clock to count the number of times your heart beats in one minute. Record result in Science booklet.

4. Run in place for about one minute.5. Repeat steps to take pulse again.6. Record the results.7. Explain what you observed in your booklet.