“Pulsation Rate of Blackworms” Antonio Cavazos Biology 1107- 102 (Tuesday 1:00 – 3:50) 04/ 07/ 2009 Jose Fierro Addison Rhudy I. Introduction For any animal that is too large and/or too complex a circulatory system is needed to obtain essential chemicals by the process of diffusion alone. A circulatory system transports nutrients‚ oxygen and other important chemicals to all body cells. This system have three components: circulating fluid‚ a heart or pulsating vessel in charge
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Introduction Lumbriculus variegatus‚ or blackworms‚ are part of the segmented worms called annelids. The body is organized into repeated segments. It has a closed circulatory system‚ similar to humans because the blood is contained within blood vessels. Two major blood vessels‚ the ventral and dorsal vessels‚ run straight from the head to the tail‚ and several vessels connect the two in the anterior segments. The dorsal blood vessel acts similar to the heart‚ pumping the blood through wavelike contractions
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fluid through the body. In a closed circulatory system‚ the fluid‚ blood‚ is contained within the vessels as it circulates through the body. The Lumbriculus variegates‚ or blackworm‚ is commonly found in stagnant water along the edges of marshes and ponds. Blackworms have a closed circulatory system‚ which in the blackworm includes a large dorsal blood vessel [1]. Glucose is the most common carbohydrate and is classified as a monosaccharide and is a reducing sugar. Glucose is called blood sugar
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affects of household drugs on pulsation rate. Since pulsation rate is such a simple physiological system it will be easier to observe a change. Lumbriculus variegatus (blackworms) were used to observe there pulsation rate. Blackworms were used do to absence of a respiratory system; they also rely on diffusion for gas exchange. Blackworms don’t have a heart there vessels are what moves the blood back in forward. Each open and closing is a pulse. In the first part of the experiment concentration of drugs
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circulatory system of blackworms. In this lab‚ the stimulant we have chosen to use is Nicotine. A stimulant is an agent that causes increased activity‚ especially in the nervous or cardiovascular systems. In this lab‚ we will put blackworms into the Nicotine to look at the differences in pulse rates when compared to a control. The proper name for blackworms is Lumbriculus Variegatus‚ they are freshwater worms most commonly found in North America and Europe. The blood in blackworms circulates from the
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Lugo Group: Bianca Jonson Short lab report 10/4/14 Effect of household drugs on circulatory system of Lumbriculus Variegatus (blackworms) Hypothesis & justification part 1: In order to understand a little bit about the effects of common household drugs such as nicotine and caffeine on pulsation rate‚ an experiment was conducted with Lumbriculus Variegattus (Blackworms). In week 1‚ we observed the basal rate of three different worms‚ and then placed the same three worms on different concentrations
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The Effects of Secondary Plant Compounds on Lumbriculus Variegatus Heart Rate Introduction Blackworms (Lumbriculus variegatus) were used in this experiment to study the effects of secondary plant compounds‚ chemical compounds produced by plants that are not part of the general metabolism‚ on pulse rate. Secondary plant compounds act as defense mechanisms which reduce or eliminate consumption of some plant species or even attract predators. These compounds are not essential to the plant but often
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usually have a slower heart rate‚ whereas a person whom drinks a lot of caffeine sodas are hyper and have a faster heart beat. I think the effect of caffeine and nicotine will have the same effect on the species we are using in class‚ a freshwater blackworm. Materials & Methods To begin this lab we first had to build a viewing chamber to view our worms under the microscope. To make the viewing chamber we had to use about 12 wax like parafilm sheets on a slide. We made sure each of the sheets fit
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Sex positions 1 Sex positions Sex positions are positions which people may adopt during or for the purpose of sexual intercourse or other sexual activities. Sexual acts are generally described by the positions the participants adopt in order to perform those acts. Though sexual intercourse generally involves the sexual penetration of the body of one person by another‚ or the stimulation of the sex organ of one by another‚ a sex position may not necessarily involve penetration or direct stimulation
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