Science Yr 10 2017

Dissecting Heart Experiment
Aim:
To dissect a heart and successfully identify the parts of the heart.

Equipment:
Newspapper
Heart
Scallpel
Scizzors

Method:

1. Spread out the newspaper 3 layers thick.
2. Identify the right atrium and the left atrium.
3. Stick your finger through the pulmonary artery into the right ventricle.
4. Stick your finger through the Aorta into the left ventricle.
5. Cut open both the left and right sides of the heart so you can see the left and right atria, and the left and right ventricles.
6. Take a photo of the dissected heart so you can see as many different parts of the heart as possible.

Results

When first time I touched the heart it felt like weird and solid but of course, it was sorta frozen, but once it began thawing you could squeeze it and it felt like a stress ball but more muscular, and when we stuck our fingers in the aorta it felt slimy and wet. But when you smelt the heart it smelt foul and rotten, honestly if nearly made me puke... This was a first time I've ever had some hands-on experience with a real heart, but it was just a sheep heart. 

Interestingly I could identify the main parts of the heart like the Aorta, the left and right ventricles and the septum. So what I found out was that the left side was thicker because the left side carried blood around your body whereas the right side sent blood to your lungs. We also found some little things on the top of the heart there was little veins I couldn't find the name of it.

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Measuring Grip Strength
Aim:
To measure grip strength with different wrist positions

Method:
First, we made the thing that measured our grip strength, using a paper protractor and a bulldog clip and some popsicle sticks.
We measured it with the protractor while we tried to clamp it down, and then we get a friend to see what degrees it went up to.

Results
What I got for my results was 70degrees with my wrist pointing down, and 70 degrees on neutral position and then 65 degrees pointing upwards.

Here is a graph of our average
http://prntscr.com/e99j9d
The main results of the graph are that the neutral position is the strongest.

Discussion
What I found out about the position of the wrist was that, if it was pointing up it was weaker than the others, and the position of pointing was weaker than the neutral position but stronger than pointing upwards. The strongest position was, of course, the neutral position with the highest average in our class to be 40.8. And the downwards position to be 39.88 and the upwards 34.68.

We could get a better result by just using more high tech grip strength measuring machine.

Some of the data on the list my not correct cause people might not have been trying or that they put
false information.

The reason I think that the neutral position is the strongest is because in our arm we have tendons and then if we have the tendons pointing straight it would be stronger and if we have it bent it would be weaker.







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Building Sports Specific Muscles

So the sport I am doing is Soccer.

Muscles that will need to be used are your legs muscles Quadriceps and the Hamstring.

Due to the amount of running and kicking they do during games.

Muscles work in pairs or antagonists, so one muscle contracts and the other muscle relaxes making the joint move so then the limb moves, so if you were wondering, the muscles don't actually connect with the bone, instead the muscle is actually connected to the bones via the tendon.Also, muscles can only contract and relax, it cannot pull. There is also a bit of flexible tissue between your joints called the Ligaments, ligaments also help your joints move freely, if we didn’t have ligaments we would probably be walking around with straight legs and straight arms. So if one of your muscles snaps or breaks this will result in extreme pain and will be unable to move.

Some exercises needed to work out the Quadriceps and the Hamstring.

Firstly you would need to do some warm ups and then after you could go for a little run then you could go up steps and down steps to work out the hamstring and quadriceps.

These exercises will help with these muscles getting used to being moved in that way so they will work easier and takes least pain. And this will also help expand the muscle.