Lymph is another fluid that runs through your bloodstream. It carries fats and sugars to tissues. It is important because it carries nutrients to tissues as opposed to blood carrying nutrients to organs.
2. What happens in your lymph nodes?
Lymph nodes create white blood cells. They also collect them and send them to where they should be at various places in the immune system.
3. What is the difference between an open organ system and a closed system. Give examples of each.
A closed organ system is when an organ system doesn't let anything in or out. An example is the circulatory system. It circulates what is already brought into the body by the respitory system around the body. An open system is quite the opposite; it takes in (air/solid) and releases (air/solid). An example is the digestive system. It takes in food and drink, and, er... recycles it, spewing it out the other end.
4. What is a hormone?
A horomone is a special chemical generated by various glands around the body. They allow the do things normally restricted by the human species, such as growth spurts and quick thinking.
5. Tell which endocrine gland is acting in each example.
a. You are feeling tired and worn out, so you drink some sweet hot chocolate and feel like a million bucks. Pancreas.
b. You are 16 and your voice is changing. Privates.
c. You are riding your bike and slam on the brakes to avoid hitting a dog. Adrenal.
d. The dog begins to chase you, so you begin to pedal as fast as you can to outrun the dog. Thyroid.
e. You are a newborn baby and you double your body weight in the first two weeks of your life. Pituitary.
6c. Experiment: Put two cups of water in two different pots. Cover one pot with a lid. Let the water heat for about 10 minutes. After 10 minuts has passed, take both pots off the stove and count to 10 slowly. Then take the lid off the pot and hold your hands one foot above each pot. Which hand feels hotter? Which hand has more moisture on it? Which pot do you think represents the human body on a hot day with lots of clothing on? Which pot represents the human body on a hot day with fewer clothes on?
The hand that was over the covered pot got hotter. This is because the heat built up over time, and was quickly released. The same hand also had more moisture because the other pot's moisture escaped while the covered one retained it's. The one with the lid on was like a human bundled up in clothes on a hot day. The other one, the one that let moisture ("sweat") out, was like a kid with less clothes, on the same day.
EXAM
1. What is the function of the lymphatic system?
It creates and carries white-blood cells for the body to exploit.
2. What is the function of the spleen?
It removes worn-out blood cells from the bloodstream.
3. Which gland in the endocrine system produces insulin?
The pancreas.
4. What is the function of insulin?
It keeps the blood sugar just right.
5. Which glands control changes in hair growth, voice and sexual organs during the teenage years?
The................um.................privates......... . . .
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