Dissecting a sheep's heart!?

Aim: I want to look at dissecting a sheep's heart.

Equipment: 

• One sheep heart

• Scalpel

• Dissecting Tray

• Dissecting scissor

• Latex Gloves

Safety:

• Make sure to wear your gloves.
• DO NOT cut yourself.
• Keep your area clean.

Method:

1. Place the heart on the dissecting tray and rinse off the excess preservative with tap water. pat the heart dry.
2. Locate the thin membrane called the pericardium that still covers the heart.
3. Carefully remove the pericardium, under which you will find the muscle of your heart called the myocardium.
4. Locate the apex. Only the left ventricle extends all the way to the Apex.
5. Place the heart in the dissecting tray so that the front is towards you.
6. The heart is now the position it would be in a body as you face the body. Locate the following chambers of the heart from this surface:

• Left atrium - upper chamber to your right
• Left ventricle - lower chamber to your right
• Right atrium - upper chamber to your left
• Right ventricle - lower chamber to your left

1. Use scissors to cut through the side of the pulmonary artery and continue cutting down into the wall of the right ventricle.

2. Use your fingers to open up the cut and examine the internal structure of the heart. Rinse off any dried up blood.

3. Locate where the superior and inferior Vena Cava enter the right Atrium.

4. Locate the different valves between the Atriums and the Ventricles.

5. Feel the difference in the thickness of each chamber.

6. Once you're done with the examining, cut out the two Atriums and put it to the side. Make sure that you don't cut any of the main blood vessels.

7. With the Atriums gone, you can further examine the blood vessels.

8. Once you're done with the examination of all the different parts of the heart. Sort them nicely.

Result: 
I didn't really get much of a result however, I did get to see the left-right atrium, ventricle and the Aorta. Which was pretty interesting.

Discussion:
What is a heart?
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. In this blood there is oxygen and nutrients which is how it gets around the body, it also helps with the removal of waste products.

What is the circulatory system?
The circulatory system is made of blood vessels. These blood vessels carry blood to and from the heart. Arteries carry blood away from the heart whereas veins carry the blood back to the heart.

How do the valves work?
Valves are a one-way door, opening to let blood exit or enter a chamber, Then closing to keep blood from flowing backward. four heart valves control the flow of blood through the heart.

What is a hole in the heart?
A hole in the heart is a congenital defect in the heart septum, resulting in inadequate circulation of oxygenated blood (a cause of blue baby syndrome)

What is the purpose of the vena cava?
The inferior vena cava is a vein. It carries deoxygenated blood from the lower half of the body to the right atrium of the heart. The corresponding vein that carries deoxygenated blood from the upper half of the body is the superior vena cava.

How does blood flow through the heart?
After entering the heart through the superior and inferior vena cava, it empties the deoxygenated blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve. When the right ventricle contracts, the muscular force pushes blood through the pulmonary semilunar valve into the pulmonary artery. from here the blood travels to your lungs to be oxygenated.

Heartbeat?
The SA node (sinoatrial node) is the natural pacemaker. The SA node consists of a cluster of cells that are situated in the upper part of the wall of the right atrium. The pulses are generated here.

Evaluation.
This is my blog post on dissecting a sheep's heart. I personally enjoyed this experiment it was fun learning about the heart. I learned about the different muscles and valves in the heart. If I were to redo this experiment I would definitely make sure to be more prepared. Also, I would like to take more photos because I didn't have many to show after I had finished. If you were to do this experiment I advise you to take your time and not rush it.

Genetics - DNA - Extracting DNA from Kiwifruit.

Aim: 
Extract DNA from kiwi fruit.

Equipment:
ziplock bags • jar or beaker that fits strainer or funnel strainer or funnel • cheesecloth (cut to cover the funnel)  • extraction solution • kiwifruit • cold 95% ethanol or isopropanol • small test tubes (1 per student)

Method:
1. Peel the kiwifruit and chop it up.

2. Put the chunks in a jar and mash it up.

3. Mix together the washing liquid, the salt, and the tap water. Stir it together without creating any bubbles. This is also known as an extraction buffer.

4. Add the extraction buffer to the mashed up kiwifruit and mash it some more. The more you mash the more DNA you will get out at the end.

5. Put the kiwifruit and buffer mixture into an incubator/ ziplock bag at 60 degrees Celsius for 15 mins.

6. Filter the kiwi through a fine sieve or coffee paper into a test tube.

7. Pour cold ethanol down the side of the test tube slowly.

Result:
Where the layer of the ice cold alcohol meets the kiwi mixture underneath, you will see a white jelly-like substance. You can hook the DNA out with a hook made from a paperclip or something similar.

Discussion: Deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information. This shape is commonly described as a double helix. The DNA coils around a highly alkaline protein known as histone. Cells are usually made up of 46 Chromosomes Unless it is the sperm or egg cell. Sperm and egg cells have half the amount (23).  These chromosomes come in pairs, females have two X chromosomes whereas males have an X and Y chromosome. These bases are joined together to form base pairs. In a DNA, Normally adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G) These base pairs connect together to form two complementary strands or helix, We know this as Deoxyribonucleic (DNA). 

Evaluation:
My experiment went quite well. I ran into no problems and got the results that I required. If you were to do this experiment I suggest you make more than what I have because I did not end with the amount of DNA that I would have liked too.

"Two worlds, One family"
To me this means even if you're different you can still get along. "Family is not bound by blood."

Tarzan tells us that even if we are different we can still get a long we don't need to fight, and we shouldn't judge one another. Tarzan also shows us the way we treat nature and it isn't good.

This is health unit. Huora. Taha Wairua.

Spiritual well being is religion and beliefs.

I feel protected and loved by my friends and family. Finding meaning in existence because i hate not seeing the meaning. Because i hate feeling alone and thinking there isn't a point to life. I Can't quite recall a moment. I don't care about others opinions on me.

Creative writing

In the history of Europe, the Middle Ages (or medieval period) lasted from the 5th to the 15th century. It began with the fall of the Western Roman Empire and merged into the Renaissance and the Age of discovery with more money, peasants were able to afford better housing and many now lived in wattle and daub houses. Wattle and Daub houses were taller and wider than the simple stick and straw houses. They also offered better protection from the weather. Sometimes they would make bread out of barley.


Again, besides cats, dogs, ermines, ferrets, geckos... heck, I just kinda love my new otter. Perhaps Quinn really senses the unique vision whereas Xion yearns zebras.

My name is Jinx, I am a great evil that corrupts this world. I burn down villages, tarnish castles, kill off civilians. The kings and peasants use to love me once upon a time. Suddenly they didnt I had been framed for the kings murder. I was born in a small village named bebbanburg. After I was 8 I was sent to the castle to learn how to fight under the royale knights. The new king was my close friend I would of never have killed him but no one believed me.

Balancing Toy

In Tech we have been making a balancing toy with two parts to it. We had to make the stand and then we had to make the balancing piece. You would put the balancing piece on the stand and it would swing.

I did finish the project much faster than most but I believe I should have taken more time to make it look a lot better. During this project, I learned how to weld. One of the challenges I face was thinking of a design to put on my balancing piece but in the end, I think it looks nice. I did weld about 3 times and I helped a few others with their welding as well. I thought welding was scary like I could burn me or someone else. I got better at welding using the bandsaw and also measuring out basic shapes.  XD

Move to improve

Why did I Choose move to Improve because it seemed fun and would help me stay fit
What do I want to achieve I want a better and fitter body
What do u want to do in this project I want to use weights improve my over all strength and see the strength of others
Standing jump- 0.5
Vertical jump- 2.59
Sit and reach- 20.8

Run test- 18.03
60m- 8.04
30m- 4.65
12 min run- 4 laps

Too much fructose can cause the insulin to go in to overdrive which can lead to diabetes. and i learnt lemonade has more sugar than coke. Im unsure about how much sugar is actually in something like a coke.