Histology is the study of the Micrscopic anatomy of cells and tissues of plants and animals. You may not know it, but humans count as animals...unfortunately. The visualization of cells is achieved through usage of a light microscope, or an electron microscope. Along with the key usage of thin strips of the samples your going to look at. Histology is extremely big when it comes to Biology and Medicine. There are many classifications of cells. And they are listed below:
Epithelial-Lining of bowels , skin and glands. Along with a some organs.
Endothelium-Lining of blood and lymphatic vessels.
Mesothelium-Lining of pleural and pericardial spaces.
Mesenchyme-Cells filling space between the organs(fat, muscle, bone, etc.)
Blood cells-Red and white blood cells including those found in lymph nodes and spleen.
Neurons- conducting cells of the nervous system.
Germ cells-Reproductive cells.
Placenta- characteristic of true mammals during pregnancy.
Stem cells-Cells that develop new cells.
http://www.histology-world.com/
There is a link that takes you to a "fun and entertaining" website on histology. Although it is very entertaining to play the games, there are many other more...educational things to do on the website.
I took a microscope exam and did a lab about histology, of which I got a smiley face with a top hat...so I got an Abraham Lincoln on it. Which, I think is better than a George Washington, but maybe that's just me. It's the top hat, definitely. In the histology lab, we had to look at different samples and draw them. We looks at bone, epithelial tissue, and a funky connective tissue. We then had to draw the tissues and other cellular items that we looked at. Although the drawings that I do not have, would be a good representation of my horrible drawing ability, that was the lab.
Thursday, October 20, 2011
Sunday, October 2, 2011
Divisional planes
In a view of your body, there are some "primary" ways of dividing your body. One of which is sagittal, or just dividing the body into left and right parts. So you would cut straight down between the eyes, making two parallel half-people. Then there is frontal, or coronal, which divides the body into Anterior and posterior parts. Meaning this time, your would cut in half from the side, cutting both ears in half...painful. Then there is transverse, which divides your body in half Horizontally, dividing the body into upper and lower sections. There is one that is not mentioned here, and that is the
Oblique section, which divides the body diagonally thoughout the body. There you have it, the division of the body.
http://www.youtube.com/watch?v=J5COfnxIMB8&list=FL8mwj6QXDUtoT6iTJD00EVg&index=1
in this resident evil clip, the laser slices the first guy horizontally through his neck. In other words, that would be a transverse cut, although it is at the neck. The second one that was cut to bits, was cut obliquely to the utmost extreme. most oblique cuts are normally one diagonally cut and not so much as a ton of squares. But, the representation still applies, and lets face it, nobody wants to be cut into little bite sized squares.
Oblique section, which divides the body diagonally thoughout the body. There you have it, the division of the body.
http://www.youtube.com/watch?v=J5COfnxIMB8&list=FL8mwj6QXDUtoT6iTJD00EVg&index=1
in this resident evil clip, the laser slices the first guy horizontally through his neck. In other words, that would be a transverse cut, although it is at the neck. The second one that was cut to bits, was cut obliquely to the utmost extreme. most oblique cuts are normally one diagonally cut and not so much as a ton of squares. But, the representation still applies, and lets face it, nobody wants to be cut into little bite sized squares.
Bodily terms
In the body, there are certain terms being used to describe certain parts. I know sounds odd right? Well, let's say that you want to describe what the front of your body looks like, you would use the word like anterior, whereas the back of your body is your posterior. It's really easy to remember because your posterior is behind you, and your anterior is in front of you. This doesn't mean necessarily your complete from of your body, you could say something like your nose is anterior to your eyes, and your eyes are posterior to your nose. Superior is you upper body, and Inferior is your lower body. The same goes for superior and inferior, although we might switch is up, and say something like, your hair is superior to your eyes, unless you have really long hair, then of which something like your hair is superior to you toes. You get the point. Medial, describes a structure towards the body's midline. Lateral is almost the same, only it describes the parts further from the median plane. Intermediate describes a structure in between the medial, and lateral plane. For example, your nose is medial to your ears, your ears are then lateral to your nose. Whereas your cheeks are intermediate of them both. Next, we come to proximal and distal. Both are describing the distance around the "trunk" (torso). Proximal means that something is closer to the torso, and distal means farther. So, we could all agree then that your foot is distal to your knee, and your knee is proximal to your foot. Superficial and deep, pretty obvious when it says deep. Deep, being deeper into your body, or simply away from your skin. And superficial is the opposite of that, being closest to your skin, or just outside of your body. So your heart is deep compared to your ribs, which would than be superficial compared to your heart.
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