Homeostasis

I currently did a lab about homeostasis, but I didn't have a clear understanding what it was at first. So now I am going to redo a blog about Homeostasis and show that now I do have a better understanding of what Homeostasis is.
Homeostasis is the process that maintains balance or equilibrium of an organism's internal environment. For example our body temperature is controlled by homeostasis. Homeo = same; stasis = standing.
Human homeostasis refers to the body's ability to physiologically regulate its inner environment to ensure its stability in response to fluctuations in the outside environment and the weather.An inability to maintain homeostasis may lead to death or a disease, a condition known as homeostatic imbalance.
We as human we need homeostasis in our body. The more we are active the more we need it. When its cold you shiver and when its hot you sweat right, Why?

This is what you would call homeostasis taking place in our bodies. In the human body, it has various ways of keeping warm and or cool depending on its outside world conditions. With other organs functioning properly blood levels of vital nutrients must be helping to. This will allow the heart activity and blood pressure in the body to react in order for blood to be involved to all body tissues. The way in which our bodies talk in this specific condition is for homeostasis to occur. 
The nervous and endocrine systems are the key contributors to this situation by sending electrical impulses by nerves or blood borne hormones. Also there are 3 components that in themselves help control the homeostatic control mechanisms. The first component is the receptor, which starts the path of homeostasis by sensing the conditions of the environment and responding to the changes,which is known as the stimuli. The stimuli helps by sending information to the second component of this chain (the control center). The control center determines the set point. It then analyzes the input it receives and determines the response or course of action. 
Then comes the last step. The component. The compoent to this homeostasis path is the effector. The effector provides the means for the control center's response to the stimulus. Thats how you know when homeostasis is occuring in your body system.

Skeletal System

Self Analysis

Since school started in Anat & Phy I have been really struggling. I member at first when it came to writing a blog I didn't know what to write and I could make it as long as a blog should be. I was really struggling with the understanding of things. Not knowing what your doing is not a fun feeling. As I get more and more into the semester i started getting the hang of writing a longer bog and understanding what Im writing about. Its never easy to understand science and the body. My strongest subject in Anatomy is the skeletal system. The bones are so easy to learn and not hard to forget where they are because they'll never move.

I had a really hard time with the tissues and homeostasis. With the tissues they all looked the same to me besides the color was the only different thing about them. I couldn't figure out what was what. No matter how hard I tried to study or by memory I couldn't get the names of them right. I'm really good at memorizing things but when it came to tissues I just couldn't remember them. The one tissue that I finally membered by heart was the compact bone. It was something about that tissue that was different that just made me memorize it. It was a light black color with a bunch of circles in the middle and since i know the bones so well I memorized the Compact bone structure.

As for homeostasis I don't quite have a great understanding of it, but i will. I'm tempted to understand what that word means and how is it involved in our life. We did a lab on it once and i kind of got the idea of it. I had to ask a friend if she understood it. So I asked if she could tell me a little on what she understood by it. She said it had to do with our body and the way we move on a daily basis. That kind of got me to understand what homeostasis meant but still need a little improvement on it. I'm going to do one more lab report on it and I hope from there I will have a better understanding on what Homeostasis means. That way when someone was to ask me what it meant I'm able to answer with an answer and not a I don't know answer.

Also we had did a blog about the levels of the organization system. That is where the body is position. I kind of know that well but not so well where if someone was to ask me what position it was I probably would be able to name some but not all of them. There are some position that I do know. For the past couple of blogs or labs we did I had to use a posterior and an anterior view. Those are the only ones that I member by heart.

Overall I think I got an understanding on some of the things we did in here, but since the I have to do one more blog I should have a complete understanding of the things we been doing in here. That way all the things I learned this semester it'll help me towards next semester.

Broken Bones

We have recently watched a video on a girl and her bones. Its weird how bones repair themselves. There like little robots but there repairing your bones in your body. There are many different types of broken bones or bone fractures. Theres

• Non-displaced- bone ends retain their normal position
• displaced- bone ends are out of normal alignment
• complete- bone is broken all the way through
• incomplete- bone is not broken all the way through
• Linear- the fracture is parallel to the long axis of the bone
• Transverse- the fracture is perpendicular to the long axis of the bone
• compound (open) - bone ends penetrate the skin
• Simple (closed) - bone ends do not penetrate the skin

Then theres common types of fractures

• Comminuted- bone fragments into three or more pieces; common in the elderly
• Spiral- ragged break when bone is excessively twisted common sports injury
• depressed- broken bone portion pressed inward; typical skull fracture
• compression- bone is crushed common in porous bones
• Epiphyseal- epiphysis separates form diaphysis along epiphyseal line occurs where cartilage cells are dying
• Greenstick- incomplete fracture where one side of the bone breaks and the other side bends common in children 

The Bionic Body

I have just finish reading an article about two wise men named Bob Langer and his colleague Joseph Vacanti. It said that they had trouble trying to get their work published because journalist just didn't see and practical applicants in there work. Now today they are known as the fathers of the field of tissue engineering. I bet the publishers regret not writing about them in the first place. Now them and there team of researchers go around the world and make custom-made tissues for those who need them.

The first so called noe-organ was approved by the US Food and Drug Administration. It stated that custom-made heart, livers, breast, corneas, bone morrow, kidneys, and bladders could offer elegant solution to the most life threatening illnesses. Thats really good for those who wait for someone to die so they can receive a transplant from them. In the later future there theory is lab grown cartilage and bone would relieve arthritis suffers while blood vessels cardiac valves and muscle tissue could save thousands of cardiovascular disease patients. In the later time line they still experiments thirty + tissues in there lab.

This a human heart grown in there lab

The first step of tissue engineering is unlocking the biochemical signals that influence growth and development. Adding the right combination of compounds scientists are able to start there growing and and proliferating. The word proliferating means to grow or multiply rapidly producing new tissue parts cells or offspring. In order to produce biologically useful tissues like cartilage and heart valves tissue engineers must pay close attention to physical environment in which cells grow.


http://www.pbs.org/saf
This video shows the tissue growing on scaffolding

The circulatory system gives each individual cell in a tissue access to nutrients and a means of waste removal. One of Mr. Langers major contribution to his file was his work in biodegradable materials that can serve as scaffolding. The video above will show that happening as it grows. Langer stated that the scaffold looks like strands of spaghetti attached together. The tissue can be custom grown for the intented recipient.  For example, to grow an ear tissue engineers mold the biodegradable scaffold into the proper size and shape. In order for this to happen they have to seed the scaffold with young cartilage cells and surgically implant the mold under the skin. This was all done on a hairless mouse. Here is a picture of it.

Once the ear is removed the mouse will not be harmed. It will remain the same. 

Levels Of Structural Organization

The structures of the body are organized in successively larger and more complex structures.

Histology lab

Connective

1. Hyaline Cartilage

• Amorph, firm matrix with imperceptible network of collagen fibers 
• Chondrocytes lie in lacunae 
• Supports reinforces cushions and resists compressionForms the costal cartilage
• found in embryonic skeleton the end of the long bones nose trachea and laryn

2. Ground Bone, cs. Human

• Ring ring tree bark 

3. Ground Bone Compact

• some ring like tree bark

Epithelia

  1. Columnar Epithelia simple ciliated

• Branch like also looks like sponge

  2. Transitional Epithelia

• Several cell layers basal cells are cuboidal surface cells are some shaped
• Stretches to permit the distension of the urinary bladder
• Lines the urinary bladder ureters and part of the urethra

  3. Pseudostratified  Epithelia

• Single layer cells with different heights; some do not reach the free surface
• Nuclei are seen at different layers
• Function in secretion and propulsion of mucus
• Present in the male sperm-arrying ducts (non-ciliated) and trachea (ciliated)

Musle

1. Striated Muscle Teased Human

• Single Cells with bunch of things in the middle 

2. Cardic Muscle is human

• Branching striated uninucleate cells inter-locking at intercalated
• Propels blood onto circulation
• found in the walls of the heart

3. Muscle Cardic Purkinje Fibers

• long thin fibers that allow for stretch

Nervous

1. Neuron Motor

•  vein look like 
• some dark areas
• spider web look like

2. Brain Basal Ganglia 

• Packed Together

Homeostasis In Action

For our first project in this class, we took the temperature of both Mikaella and Desi, before doing any activities, with a temperature probe at our forearms. Mikaella started off with the temperature of 87.7 and Desi did with a temperature of 78.1. Then, Mikaella began to try to rise her temperature by exercising around the room such as jogging, push-ups and jumping jacks.  Desi iced her forearm. They both waited out for 2 minutes continuing the activities then took the temperature of there forearms again. This time Mikaella's temperature was 89.1 and Desi was 63.9. Mikaella and Desi continued on with our activities for another 3 minutes and once again took there temperatures again. Mikaella came in a whopping 90.1 while Desi actually rose a little to 64.8. Finally, we waiting out for 5 minutes going through the relaxation period. When we finally took our last temperatures Mikaella's was 88 even, and Desi was 69.1. In the beginning we all had a hypotenuse that there bodies would respond with homeostasis, and we were correct. While going through the relaxation period our bodies tried to regain order, Mikaella by sweating, and Desi by shaking. It was a pretty neat experiment to do. 

Tissue

We recently did a lab on tissues. There are different types of tissue and different ways you can arrange them. Here is a video that shows you what the types of Epithelial tissues look like.http://www.youtube.com/watch?v=7z2vYr5YjD8. Stratified Columnar
Stratified squamous http://www.youtube.com/watch?v=88KFjtfrznw&NR=1
Simple columnar  http://www.youtube.com/watch?v=GtGdiJw2rpQ
Simple squamous www.youtube.com/watch?v=Dwdge84Uuok
Simple cuboidal http://www.youtube.com/watch?v=OwNW85c1x3U&NR=1
Stratified Cuboidal http://www.youtube.com/watch?v=omUF56C4WDs
Transitional Epithelial http://www.youtube.com/watch?v=GDyYIs2Z4CE
Pseudostratified Columnar http://www.youtube.com/watch?v=_B4GnXWe_P0

As you can see all the tissue look different and they all act different to. Us doing it as a class and doing pictures of ourselves made it a little easier to understand what each tissue does and how it looks in human form. In these videos that i found show you what they look like inside a human body.

Flash Cards
These are flash cards that will help you study

This is a presentation that will show you what or where they are located to one another.

Homeostasis

Homeostasis involves the ventral cavity. The ventral cavity is in the front of the body. It is divided into three parts the contain many of the body organs that maintain Homeostasis. The prefix home/o means constant and suffix -stasis means control. In this body region our organs have to be under control. If there not our body will not function properly. I say mainly the heart and lungs need the most control out of everything else. If we can keep that under control we have maintain homeostasis.

Homeostasis, an event occurring everyday for me. I practice softball everyday five times out of the week. I move my arms a lot just as much as i run. Running makes me hot and tired especially in that hot sun. I have to take a lot of water to stay hydrated and make sure that my body maintains control in the heat. Sometimes i sweat a whole lot more then I usually do and I started getting more thirsty then usual. When its really hot outside my body starts getting weak and not wanting to do anything. That tells me that I'm not keeping myself hydrated enough and not maintaining control of my surroundings.