By Mim McGraw 8A
Skeletal System of a prawn:
Prawns have a exo-skeleton skeletal system.Some key features of the prawn are the exoskeleton allows movement but the movement is also limited in the prawns, it also doesn't give much range as being a exoskeleton creature. The main role of the skeleton for the prawn is protection. All crustacean ( Lobsters and yabbies) have the exo type of skeleton. The prawns skeletal system is different to ours because theirs is on the outside of the body and there is also they have no bone marrow. Prawns shed some of their skeleton then grow some back and that's how they grow. Prawns skeleton is made out of Chiton which is a type of sugar and calcium carbonate.
Skeletal system of a worm:
Worms have a hydro-skeleton and their skeletal system works by; it has a fluid-fille and the worm changes shape by the pressure of the fluid.
Skeletal system of a cuttlefish:
Cuttlefish bones are very soft ,Styrofoam,powdery and got calcium in it. Cuttlefishes main role would to give it shape without much weight on it. Cuttlefish are made out of aragonite and cuttlefish are internal animals.
Skeletal system of humans:
Human Skeletal system is called the endo-skeleton, The human skeletal system is made up of bones and the materials that bones are made up of are calcium phosphate, collagen and bone marrow. The role of the human skeletal system is to provide movement, give soft tissue and protect organs. Bone marrow produces blood cells and its found in the center of bones. Our skeletal system changes overtime by; cartilage gets harder and that's what makes bone grow longer. All mammals and birds have this type of skeletal system.
Chicken Wing Dissection:
1. What structure do these correspond to in humans?
Shoulder and arms.
2. What happens when you tug on these muscles?
When you tug on the leg muscle is moves vertically.
3. Which muscle is a ex-tensor?
The outer one is the ex-tensor.
4. Which muscle is a flexor?
The inner on is the flexor.
5. What happens when you tug on the lower wing?
The arm moved back and forwards.
6. What is the tissue called?
7. Describe what it looks like?
White and a little bit shinny.
8. What is the tissue that connects the bones at this joint called?
9. What kind of joint is this?
10. What kind of joint connects the wing at the shoulder?
Ball and socket joint.
11. Describe the cartilage the lines the joint?
White, smooth and about half a cm thick.
12. Name the bones found in the chicken wing.
Humerus, ulna and radius.
THE HEART AND CIRCULATORY SYSTEM
1.Describe the appearance of the heart. what does it look like? how does it feel? Are there any features you can describe?
There is a lot of fatty tissue around the vein, it feels squishy and slimy.
3. Describe what the artery looks like.
White spidery lines surrounded by fat.
4. what do you think would happen if this artery was blocked by clot?
There would be a lack of oxygen to the heart.
5.a. The thickness of the muscle at the top of the heart.
The aorta which is on the left side and the largest artery.
b. The thickness of the muscles at the bottom of the heart.
The muscles are very thick because they have to bump blood to the rest of the body.
c. The amount of fat surrounding the heart.
There wasn't that much fat around the heart.
d. Any major vessels entering and exiting the heart.
Aorta witch exits the heart, Vena Cava enters the heart, Polmanary vein enters the heart and polmanary artery exits the heart.
6. De-oxygenated blood leaves the right ventricle in an artery and travels to the lungs. Here, the blood collects oxygen, so it is now oxygenated. The blood travels back to the heart via an vein.
7.a. Describe the thickness of this vessel. why do you think it needs to be so thick?
It is Very thick because it is bumping blood all around the body.
b. Where is it taking the blood to?
The body, Lungs and Kidneys (organs)
8.a. Compare the thickness of the vena cava to the aorta. why do you think it is different?
Vena Cava isn't as thick because it doesn't carry oxygen.
b. what part of the heart does the vena cava go back into?
The right side.
c. Remember what you observed when you observed the water flowing through the heart. The water went into the vena cava and into the heart. which blood vessel did the water come out of the heart?
9. When the water was flowing into the polmanary vein, which vessel did it come out of?
Firstly cut open the left ventricle following the lines on the diagram above.
1. Describe what you see inside the left side of the heart?
Bicusped valve, the atrium and the aorta.
2. Observe any valves you see. what do you think their job is?
The bottom part is the thicker part and its stronger because it needs to pump out blood from the aorta.
3. Cut the aorta. Describe how it appears and how it feels and any other features.
The aorta is strong and elastic.
My group and I had to make a life size of the circulatory system which included the right atrium, left atrium, valves, right ventricle, left ventricle, oxygenated blood and oxygenated blood, pulmonary veins and artery's, aorta, vena cava, the heart, lungs and the "rest of the body."
Station 1- The pluck
1. Describe the texture of the trachea. Why are the rings of cartilage important?
The texture is tough and flexible. The cartilage supports the trachea and stops it from colapasing.
2. Describe the texture and the colour of the lungs? Do you think they could have differed when the animal was functioning?
The texture was squishy and soft but was firm when you touched it, the colour was maroon. Yes the colour would be more red if it was functioning.
3. Explain how the heart connects to the lungs.
The heart is connected to the lungs by the pulmonary veins and pulmonary artery.
4. What is the role of the diaphragm? how does it control our breathing?
The diaphragm expands and contacts and allows oxygen to come in.
5. What is the role of the liver?
The role of the liver is to make bile (gastric jucies)
In Conclusion the respiratory system and the Circulatory system are quite simular