hey ladies! okay so last class we went over the anatomy of the bone and also the functions of the skeleton. so incase you missed some of the facts ill briefly summarize what we went over last class :)


the 3 types of tissue are
1) bone, cartilage, and dense fibrous connective tissue

Longbones are covered by periosteum and there are 2 types of longbone which are
- epiphysis- which is the widened end of the long bone
-diaphysis- which is the shaft of a long bone

there are 2 types of cells which are
- osteoclasts which break down matrix and release calcium to blood, which takes 3 weeks
- ostioblasts which pick up calcium from blood and deposit it in a new bone matrix.
--> one way to remember which one is which is if you think osteoclast which sounds like osteoCRASH which would break down :) thats the way i think of it

The functions of the skeleton are
1) structural support
2) protection of soft body parts ----> ex. skull, rib cage
3) protection of blood cells ---------> ex. red bone marrow in ends of longbone, sternum, pelvis
4) storage of minerals and fat-------> ex. calcium phospate in bone matrix, fat in yellow marrow
5) Locomotion - along with muscles

So in class we didnt get around to watching the Hannah Montana Bone dance cuz the internet was down so i heres a link cuz it could help learning the bones :)

http://www.youtube.com/watch?v=3Waxf9KZWpM

Also i think maria asked in class if there what the diffferences were between the girls skeleton and the guys so i found out :)

The main difference between a girl and guys skeleton is the pelvis, because of course the whole childbirth thing. So the womans pelvis is flatter and more rounded . Men have thicker bones, longer limbs and phalanges. while women have smaller ribcages, smaller teeth, less defined facial features such as ur eyebrows and also the small bumb at the back of your head is smaller than men. Also the forearm is shaped differently then a guy, and we also have rounder shoulder blades.

hope this helped :)

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Follow-up: Five-Second Rule!

Hey everyone,

So building on what Rebecca mentioned, and stemming from the movie, the guys on Mythbusters attempted to solve the age-old question of whether or not "The Five-Second Rule" actually holds up.

Check out the video to see what happened...

Mythbusters: Five-Second Rule

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Osmosis Jones: Part 2

Hey girls, so today we finished the movie Osmosis Jones. There are many parts of the movie that related to what we have learned in bio this year. One of the main things that I noticed was when Osmosis and Drix were talking to the virus in the streets the virus said that he was injected into the body. I notice that this is an example of active immunity. If you remember active immunity is when someone is injected with a vaccine, which is a dead or weakened form of a bacteria or virus.

Also when Osmosis and Drix were in the blackhead club there was a lever at the bar that said "bile". We learnt about bile in the digestive system. Bile is created in the liver and stored in the gull bladder.

The hypothalamus was also mentioned a lot throughout the movie. The hypothalamus deals with homeostasis. This is why when the bad virus takes a DNA bead from the hypothalamus Frank's temperature starts to go crazy. Because the hypothalamus was compromised it couldn't do it's job of keeping the body's temperature constant.

There were also minor hints about the circulatory system, in the movie. One was that the roads were either red or blue. These were supposed to be veins and arteries depending on the colour. (Veins were blue, and arteries were red) This is because veins carry deoxygenated blood thus causing them to be blue. Also the car chase took place on the superior venae cavae , which if you remember is the largest vein in the human body.

This movie also taught us that the highest temperature that the human body can reach is 108 degrees. And also that memories are stored in the subconscious part of the brain.

That's all I could find hoped you liked the movie!!!

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