The appliance or circulatory system is responsible for the pumping and distribution of blood to all body cells, needing these substances containing oxygen and nutrients addition to this deal, Blood is also responsible for collecting waste from the metabolism that takes place in every body cell. These wastes are mainly carbon dioxide and urea, among others.
Blood circulates within the human body by a system of arteries and veins, without leaving this system, the circulatory system being a closed system, and there is an engine or a pump responsible for pumping blood through the plumbing system that are the vessels.
The heart is a glass spread with a thick muscle layer as previously mentioned is responsible for pumping blood through the arteries and veins system. Is divided into four chambers two atria (right and left) and two ventricles (right and left). The atria and ventricles on each side (right or left) are connected by valves to prevent backward flow of blood when there is pumping it. The pumping mechanism by the heart is due to two movements: contraction and relaxation or systole and diastole
in humans We can distinguish two circuits, the systemic circuit and the pulmonary circuit. The pulmonary circuit of the right ventricle, through the lungs to oxygenate the blood and removing carbon dioxide it back to the left atrium. The systemic circuit of the left ventricle by the aorta, carrying oxygen to all cells and nutrients and picking up waste and carbon dioxide and returns to the heart by the vena cava to the right atrium.
The amount of blood which may contain a circulation system of an adult human can be about 4.5 or 5 liters, with two types of components. The liquid called plasma and cellular component including red blood cells or red blood cells, white blood cells and platelets. The red cells will be dealt with transport of oxygen and carbon dioxide, leukocytes are the cells responsible for defending the body against pathogens while Platelets prevent blood loss when injuries occur.
Beyond these functions of blood, its components, such as blood flow is responsible for maintaining body temperature at 36.5 - 37 ° C.
TASK
Among all students in the class of 4 º ESO going to learn the circulatory system. You are going to divide into groups and each group must perform work to present in class if the teacher so among you will learn all the parts and functions of this system. In order as shown here and draw will be assigned work items. How are you going to make a presentation each run for a maximum 15 minutes can use the resources that you consider necessary, such as power point, models, animations, drawings on the board ... The issues are ordered
1. Circulatory System Overview
2. Structure and function of blood vessels
3. Structure and functions of the heart and blood circulation
4. the reports of blood components: red blood cells and platelets
5. The liquid component of blood
6. Diseases of the circulatory system
PROCESS
Let's divide the class into 6 groups of equal number. By lot will be assigned to each issue working groups. Will develop a presentation about 15 minutes maximum to present in class like a teacher, without limitation of resources, ie, the necessary power point slides, use of animations, models, etc.. The presentation will expose all students in the group. It is advisable that a written work from it to develop the presentation, not necessary to deliver this.
addition you will have to deliver the presentation in print or digital format, according to you have, in addition to the resources you have used as models for example. If you are web pages, you will have to submit a list of addresses you've used or the reference books that you have used. Along with this give me a sheet which clearly state that part of the presentation will expose each.
RESOURCES
Then I give you a list of books that you can see in the school library. We also find the same or similar in the library in your town hall.
· Fox SI. Human Physiology. Editorial Interamericana. 2003.
· Guyton A, Hall JE. Textbook of Medical Physiology. Elsevier. 2006.
· WV Engelhardt, G. Breves Veterinary Physiology. Editorial Acribia. 2002.
· Levy MN, Koeppen BM, Stanton BA. Physiology. Mosby Elsevier. 2006.
· Pocock G, Richards CD. Human Physiology. The basis of medicine. Editorial Masson. 2003
I also facilitated a series of web pages that you think may be useful for carrying out this work
Wikipedia
http://www.escolar.com/cnat/10circulacion.htm
http://www.victoriacollege.edu/dept/bio/Animations/iworx/human_heart.html
http://www.proyectosalonhogar.com/CuerpoHumano/Cuerpo_humano_circulatorio.htm
http://centros6.pntic.mec.es / cea.pablo.guzman / cc_naturales / aparato_circulatorio.htm
http://www.kidshealth.org/teen/en_espanol/cuerpo/heart_esp.html
http://iessuel.org/ccnn/flash/animaciones.htm
http : / / www.medtropolis.com / Vbody.asp
http://www.walgreens.com/adamHtml/animation/200000.htm (English)
http://www.latinsalud.com/articulos/00900.asp
http://www.puc.cl/sw_educ/anatnorm/acirculat/index.htm
http://www.araucaria2000.cl/scirculatorio/sistemacirculatorio.htm
http://people.eku.edu/ritchisong/301syl.html (English)
Other pages you can see are those that accedáis through Google or other search engines as well as books that you may have at home on this topic or available through both real and virtual.
ASSESSMENT The rating of this activity will be both individual and collective. In the collective part will be taken into account (90% of the total grade):
· Content of the presentation 20%
· Depth of 20% assigned topic
· Clarity with which the subject is exposed in the presentation 20%
· Structuring 10% presentation
· Bibliography used 10%
• Resources used 10%
The individual ratings take into account the exposure of each student in the presentation that has been assigned (10% of the total mark)
C ONCLUSION
When completed this activity, students will learn among other things to learn better to work together, to structure and divide activities and synthesize content. In addition they will learn the structure and function of the circulatory system and its components. Also have acquired more skills public speaking as well as information searches, and use of computer applications, as well as the expression of the literature in a suitable manner.
0 comments:
Post a Comment