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Biology Lab Report Connective Tissue Paper

Words: 796, Paragraphs: 7, Pages: 3

Paper type: Report , Subject: Biology

Muscle tissue: It is in charge of the contractive action or movement of the body. It can be attached to bone, internal organs and blood vessels. Due to this contraction it performs other actions such as posture, joint stability and heat production. There are 3 types of muscle tissue. * Skeletal muscle: It is composed of striated muscle fibers with many nuclei in the periphery and it is attached to bones. It is controlled by the central nervous system and so it is voluntary. The muscle fibers are striated and each acts independently of the rest of the muscle fibers.

Smooth muscle: It is opposed to skeletal muscle in everything. The fibers are not striated, they are spindle shaped with a central nucleus and they act independently of our consciousness and they are located in the walls of hollow internal organs such as blood vessels, uterus and bladder. They facilitate or retard the transportation of fluid. * Cardiac muscle: It is located in the walls of the heart and its part of the autonomic nervous system too, meaning they contract involuntarily. The cardiac muscle cell has one central nucleus like smooth muscle, but its striated like skeletal.

It is rectangular in shape. The contraction is involuntary, strong and rhythmical. 2. Adipose tissue: It is composed of adipose cells called adipose. It can be found within the connective tissue isolated or in small pads. It is a source of energy in the body but it can also serve as support for internal organs, shock absorbers, thermal insulator and if subcutaneous it helps shaping the surface of the body. There are 2 types of adipose tissue. * Molecular (yellow) adipose tissue: It is composed of cells that contain one large droplet of yellow fat inside the cytoplasm.

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Multilateral (brown) adipose tissue: It is composed of cells containing numerous lipid droplets and abundant brown mitochondria. 3. Nervous tissue: It is composed of only 2 main types of cells, Neurons and Glacial cells. * Neuron: It is a cell whose function is to transmit electrical impulses between the central nervous system and the organs or between them. They are mitotic meaning that they do not undergo mitosis so there is no way to replace them. They are composed of 3 parts, Soma or cell body, Dendrites and one Axon, being these last 2 cytoplasm extensions coming from the plasma cell body.

Dendrites are in charge of sending the impulse to the cell body or Soma (Afferent process) and Axon is in charge of sending the impulse away (Efferent process). There are also Intervention (Association neurons). * Glacial cells: They are not conductive and their function is to provide a support system for the neurons. 4. Blood: It is formed by 55% of plasma and 45% of different specialized blood cells. 99% of these specialized cells are Erythrocytes or red blood cells carrying oxygen. The rest are white blood cells that are in charge of defense, and platelets that are fragmented cells involved in blood clotting.

White blood cells can be divided into two groups depending if there is presence or absence of granules in their cytoplasm. Granulocytic include interruptions, sinkholes and basophilic and have abnormal nucleus shape, whereas Granulocytic include lymphocytes and basophilic and have a rounded nucleus shape. Ill. Experimental This lab was divided into 2. Both parts consisted on choosing different slides to observe under the microscope, however, the lab experiment was too long and only a few slides from the second part, apart from the first part of the experiment, were observed. The rest of the experiment is to be finished in the next lab session. SST part: Different slides were observed, identified and drawn. A. Human blood B. Nucleated frog blood C. Skeletal muscle D. Cardiac muscle E. Smooth muscle F. Adipose tissue G. Nerve tissue H. Actresses 2nd part: Same procedure but only few slides observed, identified and drawn. A. Artery and vein B. Integument system (Skin) C. Digestive system (Stomach) D. Digestive system (Liver) IV. Results Attached to the lab report. V. Discussion In this lab, the slides were considerably easier to observe and identify however n some cases such as neurons, several slides were to be observed in order to obtain a clear view.

Also, the length of this lab and the big amount of slides to be observed, made it impossible to finish and some slides from the second part were left for the next lab session. Slides observed for the second part were drawn and included in the Results. VI. Conclusion In this lab experiment, all the slides were correctly identified and named. As in the previous Lab, the slides were already prepared and no work apart from observing through the microscope, identifying and drawing the results, was to be done.

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This academic paper is composed by Samuel. He studies Biological Sciences at Ohio State University. All the content of this work reflects his personal knowledge about Biology Lab Report Connective Tissue and can be used only as a source for writing a similar paper.

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