|
|
|
|
Body trivia
Questions
(Check your answers below)
1. What's your body's largest organ?
2. True or False? When you touch a hot stove your nerves must carry a message through your spinal cord to your brain before you can move your hand.
3. Does respiration mean "breathing" or "sweating"?
4. What is the main entrance to your respiratory system? HINT: It smells!
5. Which is not the kind of cell you would find in your body - blood cell, skin cell, jail cell, muscle cell?
6. True or False? All cells live about a week and are then replaced by new ones.
7. True or False? Your skin cells stop dividing and making up new skin cells when you are 21 years old.
8. True or False: Your skin is considered an organ.
9. Take your pulse. What internal organ are you checking?
10. You just did a backbend. Did your skin stretch?
11. True or False? Blood gets around to all parts of the body by flowing through tubes or vessels, called arteries, capillaries and veins.
12. Choose one. Is your heart like a pump, a fan or hose?
13. Point to your heart. Did you point to the right, left, or middle of your chest?
14. Does your heart beat faster or slower when you're playing sports?
15. You exercise your leg muscles when you jog or ride a bike. Are you also exercising your heart?
16. Your sense of touch includes everything you can feel with your skin. Which of these is NOT one of those things - heat, cold, color or pain?
17. Guess how much blood is in the body?
18. True or False? Your fingers and toes get wrinkled when you take a bath because they're dry.
Answers
1. Your skin (your surrounded by it!)
2. False - To keep you from burning yourself, your spinal cord sends a quick message to your muscles making you move your hand. At the same time, a message goes to your brain telling you you're in pain. This is called a reflex.
3. Breathing.
4. Your nose - your mouth is also an entrance, but you usually breathe through your nose.
5. Jail cell.
6. False - some cells, like nerve cells, last a lifetime, while others, like skin cells survive only a few days.
7. False - skin cells keep dividing and making new cells your whole life.
8. True - your skin is an organ whose job is to protect the internal organs in your body.
9. Your heart. (Did you get the beat?)
10. Yes - whenever you move a body part, your skin must stretch.
11. True.
12. A pump - it actually has two sides, one that pumps blood to your lungs and another that sends the blood to the rest of your body.
13. The middle. (Although most of it is on the left side.)
14. Faster, to send extra blood and oxygen to your muscles.
15. Yes - when your heart beats harder and faster, your heart muscle becomes stronger.
16. Color - other things you can feel are pressure and texture.
17. A baby has one quart. A child has three quarts. An adult has five to six quarts.
18. Believe it or not, it's true - even though you're surrounded by wet water it's actually pulling the moisture right out of your skin.
Amazing Facts!
In your whole body, there is only one organ light enough to float on water of your air-filled lungs!
You can live a few days without water and even longer without food, but you can't live without oxygen for more than a few minutes.
Your body is made up of about 75 trillion cells (give or take a hundred million).
A heart beats more than 2 billion times during the average lifetime. (But who's counting?)
Most men have more blood in their bodies than women about one quart (one liter) more.
Did you know that wearing light colored clothing will keep you cooler when it is hot outside? Light colors reflect the suns heat, while dark colors absorb it.
The heart is the strongest muscle in the body. It has to do the job of pumping all your blood throughout the body for your whole lifetime. The heart is about the same size as your fist.
Laid end to end all the bodies blood vessels would measure 60,000 miles. Enough to go around the earth 2 times!
|
|
|
|
|
|
|
|
