Rats - Biology

Today for biology we have a diagram of a rat. We have all of the organs in the picture and we have to label the organs from the photo. I didn't want to dissect the rat because I don't like rats so I am doing the paperwork for the dissection instead.

1 - Oesophagus
2 - Trachea
3 - Heart
4 - Lungs
5 - Liver
6 - Large Intestine
7 - Stomach
8 - Pancrease
9 - Small Intestine
10 - Rectum

Digestive System - Biology

Nutrients - Testing

For the last three lessons, we were working on learning about what the body needs in terms of nutrients. We had to do three experiments to see if the foods we had were carbohydrates like simple sugar and complex sugars or if it were a protein. We split into groups and in my group, we had Lyan, Alliah, Milan, Lucy, and me. We started off by thinking about our hypothesis and then moved on to the real experiment. We used milk, egg, bread, sugar, apples, and potatoes.

Test 1 - Simple Sugars

Hypothesis -

My group and I think that the simple sugars were apples and sugar.

We put strips of food into test tubes adding benedict solution and putting it on the heat for 1 minute to see if it changed into an orange color. simple sugars.

We found that the only simple sugar in the groups of food was the apple.

Test 2 - Complex Sugars

Hypothesis -

My group and I think that the complex sugars were bread, milk, eggs, and potatoes.

We again put strips of food into the test tubes this time adding 5 drops of iodine. We could tell it was a complex sugar if it went for brown to black the moment it touched the food.

We found that bread and potatoes were the only complex sugars out of the group.

Text 3 - Proteins

Hypothesis -

My group and I thought that the milk and eggs were the proteins of the group.

We put the strips of food in adding 5 drops of NaOH as well as 5 drops of Cuso4. We could tell it was a protein when it went from blue to purple.

We found that the milk and eggs were the proteins.

Heart Dissection - Biology

Yesterday in Biology we talked about the heart and what it does as well as dissecting a pig's heart. We started off by talking about the things the heart does to keep you alive. The heart basically pumps the blood around the body to try and deliver the entry and nutrients to the right cells. Your heart pumps to keep the blood pumping and flowing for if it didn't then your blood would be still and you wouldn't be able to get the oxygen and nutrients to the right cells. When your blood pumps it goes around to the lungs to collect the oxygen while making its way around to get the nutrients from the digestive system to send them down to the different cells that need them. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it collects the oxygen and replaces it with the unwanted carbon-dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through the arteries to the rest of your body.

When we were dissecting the heart we started by using the scalpel and cutting the left side gently being careful not to cut ourselves. The left side was the thickest side of the heart for it has a lot more muscle. The left side of the heart is thickest for it has to push the blood out more forcefully because it has further to go but it also has to defy gravity when it travels up your body. Then we cut the right side of the heart and found it to be the thinnest side of the heart. The right side was thinner because it had less muscle surrounding it. The right side pumps the blood the lungs which are right next to it which makes it pump the blood with less force then they do with the left. After that, we split it straight down the middle and started playing around with it while learning more about how it works.

Arthritis - Inside And Out

For the past two days, my friend and I have been working on a slideshow about arthritis. We talked about what it was, the different types, and how to prevent arthritis. We did a lot of research and found out a lot of things we didn't know until today. I found out that arthritis isn't caused by clicking your bones unless you bend them too far and mess with the ligaments and cartilage by your bone. Lucy and I halved the work but we also communicated about what we were putting in the slide so we can learn more and compare our information. I found this assignment easy and fun to do which was a surprise for I am not a huge fan of biology.

How Does Your Hand Work - Inside Out

For the past two weeks, we have been looking at bones and muscles in our bodies but we have been recently been looking at how our hand functions. In your hand, you have 27 bones keeping it in place as well as 20 joints to help bend your hand in ways to help us with everyday activities. With the muscles in our hand, we have them in our palm and forearm but our fingers don't have any. You have two types of joints in your hand, the first one is a hinge joint which is a joint that can only move one way like how your fingers can only for forwards, the second is a ball and socket joint which is the joint that can move around in a circle. 

We made some hands of our own out of paper, reusable straws, and string. We cut the paper into a hand shape and stuck that straws to it. We cut three pieces for the fingers but two for the thumb, then we cut 5 medium-sized ones to connect the fingers to the hand. After that, we cut a small part of the straw to connect all of them together. Once we were done with the base we used 5 thin strips of string and put them through the straw.