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February 05 Play the Blood Typing GameSome genes show co-dominance and are both strongly expressed in the phenotype of an individual. The human ABO blood group system is a prime example of this co-dominance. It is important the a person who needs blood receives the right type because of the presence of antigens (chemical fragments on the surface of cells that permit cell to cell recognition) on the surface of the red blood cells. If the wrong blood is given to someone they could die.
Here is your chance to prove your worth as a prospective medical practitioner. Save the lives of the people in this accident by giving them the correct blood.
To Abort or Not to Abort?I was experiencing some difficulties in posting new information to the blog due to technical difficultites.
However we are up and running again.
A question is often posed as to whether abortion is murder and up to what time in the gestational period is acceptable. Well the Society fot he Protection of the Unborn shows us in the link below the dya by day development of the foetus in the mothers womb.
January 18 Bananas Have SeedsYes bananas do have seeds. The fruit that we commonly buy in the supermarket is actually sterile and propagated asexually so it does not have any visible seeds. No those little bown specks are not the seeds. However, banana seeds in nature can actually be quite large.
Do All Planets Have Solar and Lunar Eclipses?Eclipses on other planets? what an interesting thing to consider. Here is a website that explains how this is possible
January 13 Moon In ShadowOk, this one is for the second years but anyone will find the information interesting. A shadow is formed when an object obstructs the path of light rays falling on a surface. We started looking at the phenomenon of eclipses in class. Now for personal interest, what about the every day changes in the shadows on the moon's surface. Impress your parents with this one!  Visit the link below.The Phases of the Moon January 10 The Woman With Two WombsIn class today a student commented on a news report in the newspaper about a woman that had two wombs. That took me completely by surprise. So just in case any od you missed the articles you can find them here.Quite fascinating! Feel free to post any comments. How Pregnancy Occurs in A Double Womb (How Stuff Works) Triplets For Woman With Two Wombs Woman With Two Wombs Tells of the Joy Of Giving Birth to Twins January 08 Male Birth Control Pill????Contraception has become increasingly important to this career oriented generation. See what is in the works to get the male to play a more active role in hormonal control. Take the Pill Sperm Manufacture and ReleaseOk 5ths, We have started out lookign at the structure of the male reproductive system. I found an animation that should help you to properly visualise this key event in external fertilisation. Pathway of Sperm Release How Do Fibre Optics Transmit LightDuring an Integrated Science class today a student asked this question. Here is a link that will supply the answer. Knowledge is power! Fibre Optics And Light January 03 Countercurrent exchange in fishCherise asked for some help in explaining the countercurrent mechanism of venitlation in bony fish. As a fish swims a current is generated in the OPPOSITE direction to that in which the fish is moving. Somewhat like the aerodynamics over a moving car. As water is taken into the mouth of the fish it flows over the gills in the manner described above. Now the blood in the circulatory system of the fish in order to be reoxygenated must flow back to the gills. This happens to be in the same direction therefore in which the fish is swimming. Deoxygenated blood returning to the gills encounters oxygenated water passing over the gills. There is therefore a very large concentration gradient and oxygen diffuses out of the water and into the blood.This is why the blood becomes increasingly oxygenated as the water loses its oxygen content. I will attach an animation of this exchange of oxygen. Countercurrent ventilation Happy New YearHello Students, It is a New Year 2007 and I want to wish you all the best that this year has to offer. Reach for your dreams with diligence and never give up trying. Failure is quitting! December 12 Human Body and MindI received an email from Emily about the following site. You will enjoy this one alot! Hey you can also drop me an email about any interesting sites that you find as well.! I found out the sex of my brain LOL! HUMAN BODY AND MIND December 02 Make Yogurt at Home (LACTIC ACID FERMENTATION)Feeling like eating a tasty culture of live bacteria? This site describes how you can make your own yogurt at home. MAKING YOGURT AT HOME YOPLAIT YOGURT HOMEPAGE 4D Videos of a Baby in the WombTechnology is racing ahead and at this link you can find a video of a baby moving in the womb. If you let the clips play on the national geographic videos will show you more on killer bee stings etc. VIDEO PAGE November 30 Ecology Field TripHello students of the 5th year For the field trip please review notes on soil conservation techniques as well as abiotic conditions at the beach and plant adaptations to transpiration in saline and windy environments.Walk with a clipboard or something hard to press on that will still secure your worksheet (rubber bands, paperclips etc.). It may be quite windy. We may be investigating rock pools if the tide is amenable so you can INCLUDE a pair of slippers in addtion to the SNEAKERS being worn on your feet. The slippers should be placed in your bag in the event that they are needed. Some reading on soil conservation Mangement of Soil Erosion by Libby Y. Field November 23 Flowers Just Get the Job Done!No questions asked...flowers are efficient at getting the job done.
Look at several types of insect and wind pollinated flowers to get a better idea of how flowers even mimic other animals and trick others into thinking so...
Development of the Wild CucumberI found another interesting site where someone looked at the development of the wild cucumber from flower to fruit. Notice the separate male and female flowers -another adaptation plants have.
Also notice in this flower that the ovary is below the corolla instead of above it and is called an inferior ovary. This is the same reason why the english apple has sepals at one end and a stalk at the other. The Guava is another fruit that has an inferior ovary, thus the remains of the calyx at the base of the fruit and a stalk at the other.
November 22 Get to know fruit betterOk 5th years, we are looking at fruit development and structure. This website should prove a valuable tool in identfying the structures of many of our own local varieties.
Fun in Discovery |
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