1. Cerebral Stretch #92
January is named after Janus, a mythical Roman god with two faces. Why would this be chosen as the name for the first month of the year? Do you think it is appropriate? Give reasons for this opinion.

2. List all of the body organs you can in the next 4 minutes.
Compare your list to your table partner’s and add any you didn’t have.
Compare to someone in front or behind you and add any you didn’t have.
How many organs are there?
Which organ is largest?
This week’s news reported, “New Body Organ Discovered In The Digestive Tract.” Listen to the information about this discovery and see if you agree with the headline.
Video clip
Cerebral Stretch #93

3. Cerebral Stretch #94 A human baby has 60 more bones than an adult.
Why would this be so?
What happens to the 60 bones?
According to HowStuffWorks, babies have more bones than adults because some infant bones are separate pieces that gradually fuse after birth. In addition, newborns have cartilage that turns into bone over time. Adults typically have 206 bones, but infants have a combination of 300 bone and cartilage structures
Cerebral Stretch #94

4. Human bones are ounce for ounce, stronger than steel.
Your bones are composed of 31% water.
What else makes up bones?
The chemical elements that make up your body are worth around US$160.
Our bodies consist of 60 out of 118 confirmed elements in the periodic table or 50.8% of the periodic table.
Cerebral Stretch #95

6. Your femur is the longest and strongest bone in your body
Compare the length of your femur to your height.
Use a tape measure and while sitting down measure the length from your hip to your knee.
At the white board measure your height.
Compare femur length/height
Cerebral Stretch #96

7. Cerebral Stretch #97 Are you a Square?
Use a tape measure and a partner’s help to measure your “wingspan,” the distance from one outstretched arm, across your back, and down the other arm. Record the measurement in centimeters.
Compare this to your height that you measured 2 days ago. Record this measurement.
Are you a square? How close did you come?
Check the other people at your table to see how many squares there are.
Cerebral Stretch #97

8. Predict the circumference (in centimeters) of your bicep muscle while at rest and while flexed. Do this for both arms.
Make a chart like the following:
Predicted arm at rest
Arm at rest
Predicted flexed bicep
Flexed bicep
Right
Left
Fill in the predicted values and then get a tape measure to do the actual measurements.
Was one muscle larger than the other? Why or why not?
Cerebral Stretch #98

9. Cerebral Stretch #99 Muscle Strain
Using your best handwriting, write your first and last name.
Using your writing hand, open and close the clothes pin 150 times
Again, write your first and last name.
Is there any evidence of muscle strain?
Did this task cause you any discomfort?
Try the same procedure with your other hand. Any difference?
What else causes muscle strain?
Cerebral Stretch #99

11. Cerebral Stretch #100 Testing for Nerve Endings in your Skin
Does all of the skin have the same amount of nerve endings?
Do some areas need to detect pressure, heat, etc. more than others? Why or why not
Use a hairpin to determine your partners ability to detect pressure on their skin.
Test an area on the hand and on the arm, leg, or back. Record your results on your system notes page.
Cerebral Stretch #100

12. Cerebral Stretch #101 Type of Joint Locations in the body
Make a chart like this and complete the information.
Type of Joint
Locations in the body
Other examples
Ball and socket
Hinge
Gliding
Cerebral Stretch #101

14. Cerebral Stretch #102 List 3 major organs of the skeletal system
List 3 major organs of the muscular system
List 3 major organs of the integumentary system
Pull out all of your notes on integumentary, skeletal and muscular systems, including your last quiz, and review for today’s quiz.
Cerebral Stretch #102

15. In today’s lab you will be cutting through several layers to get to the muscles we want to observe.
The first layer is the skin. To what system does it belong?
Next is a thin transparent layer covering the muscles and bones. This is called connective tissue.
What purpose do you think the connective tissue serves?
You will also see a durable white tissue that connects the muscle to the bone. What is it called?
What kind of joint you will observe?
Cerebral Stretch #103

16. Cerebral Stretch #104 Exercise your Heart mini lab – page 605
Take your pulse – count the number of beats for 15 seconds and then multiply by 4
Then jog in place or do jumping jacks for 30 seconds – take your pulse again after the exercise
Rest for 5 minutes and take your pulse again.
How did exercise affect your heart rate? Why?
How does your heart rate affect the rate at which red blood cells travel throughout your body?
Did your heart rate return to normal (or almost normal) after you rested? Why or why not?
Cerebral Stretch #104

17. Cerebral Stretch #105 Identify numbers 1, 2, and 3 on the diagram.3. 2.
Identify numbers 1, 2, and 3 on the diagram.
4. What problems occur if the thin elastic muscular walls get clogged with cholesterol? 1.
Cerebral Stretch #105

18. Carbon dioxide breath mini lab