Okay so below in the first few pictures is the arm. We were asked to make with an arm with things that we found around the house. Necessity is the mother of invention and that is exactly what you will see going on here.
**Directions on the making of the arm**
1) I took the two bones radius and ulna (knitting needles red and gold) and wired them together
2)Ran a long wire along the side of them.
3)Then took a bit of duct tape and crinkled it into a ball more flattened for the joint or connection area between the bones.
4) Got the silver knitting needle (humerus) and connected them together with wire and alittle bit of tape.
5) Extended the wire along side the humerus this acted as the muscle and my hand was the nerve impulses.
6) Pulled the wire and it made the arm move
7) Oh and artificial arms are not my specialty... haha.
These are the things that I used to make my mechanical arm. A paper hand cut out. Duct tape for the joint. Wire for the muscle movement. Tape to hold it in place. the knitting needles were used for the bones. This was kind of challenging but lots of fun!
**Directions on the making of the arm**
1) I took the two bones radius and ulna (knitting needles red and gold) and wired them together
2)Ran a long wire along the side of them.
3)Then took a bit of duct tape and crinkled it into a ball more flattened for the joint or connection area between the bones.
4) Got the silver knitting needle (humerus) and connected them together with wire and alittle bit of tape.
5) Extended the wire along side the humerus this acted as the muscle and my hand was the nerve impulses.
6) Pulled the wire and it made the arm move
7) Oh and artificial arms are not my specialty... haha.
These are the things that I used to make my mechanical arm. A paper hand cut out. Duct tape for the joint. Wire for the muscle movement. Tape to hold it in place. the knitting needles were used for the bones. This was kind of challenging but lots of fun!
The picture below is of the arm fully extended.
The picture below is of the arm moving to a waving position.
The picture below is of the hand in an upright position. "HEY!!!"
The hand was able to move by pulling on the wire that I had running from the hand along side the bones (radius and ulna the red and gold knitting needles) and through the joint along side the humerus (silver knitting needle). Below is a picture of the upper skeletal body of a human. If you could just focus on the arm that is what I did my lab on. If you look to the left hand side of the diagram you can see the arm that I made form ordinary house hold items. http://en.wikipedia.org/wiki/Arm 
Next we had to make a neuron and its parts. So this is how I did that. The picture in the center is actually what it is suppose to look like. Remember without these little guys we would not be able to move arms, legs, or joints. A neuron is a highly specialized cell that generates and transmits nerve impulses from one part of the body to another. Pretty amazing!
**Key terms**
Synapse is the juncture of two neurons that allows an impulse to travel from one neuron to the next.
Synaptic cleft is a gap between an axon and the dentrite or effector it supplies (muslces or glands)
Receptors are structures that respond to internal or external changes. There are three types of receptors in the body; encapsulated, nonecapsulated (naked nerve endings), and specialized ( like the retina).
Neurotransmitters are chemical substances that are released from the terminal ends of axons when a nerve impulse arrives. This either stimulates or henders the next neuron.
**Supplies and their names or symbolism**
I used color paper cut outs, beads for the neurotransmitters, yarn for the microtubules, wire for the receptors, and hole punches with beads for the synapse vesicles for the different parts.
Below is a picture of synapse.
Below is a picture of synapse.
**Some more key terms**
Dentrites are short highly branched fiber that carries impulses to the nerve of the cell body.
Axon is a long unbranched process attached to the nerve cell body of the neuron that transports nerve impulses away for the cell body.
Myelin sheath is layer of fatty material coating the axons of many neurons in the central and peripheral nervous system.
Node of Ranvier is a small gap in the myelin sheath of an axon it is located between segments formed by schwann cells.
**Picture an supplies and their parts**
The picture above shows an actual neuron. The black dot in the center is actually a big magnet, the nucleus and all the parts surrounding it are the same as what is in a cell microtubules, mitochondria, ribosomes etc... Where the green contruction paper meets with the red is the area of synapse. The red branches are the dentrites. Notice the node of Ranvier and each blue gray piece that is separating it is the myelin sheath and at the end of that "tail" is the axon terminal.
The picture below is that of a muscle and how it is broken down.
http://en.wikipedia.org/wiki/Image:Skeletal_muscle.jpg
http://en.wikipedia.org/wiki/Image:Skeletal_muscle.jpg
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