THE HEARTBEAT Heartbeats are needed to pump blood around our bodies. Heartbeats are initiated with electrical impulses which start out in Sino Atrial Node. The Sino Atrial Node sends its electrical impulse to the atrium when it detects that it is full as when the atrium is full it contracts and squeezes the blood in to the ventricles. In order for the ventricles to squeeze the blood out of the ventricles and in to the arteries so it can be pumped around the body‚ the electrical message from the
Premium Heart
The purpose of this experiment was to see if the different amounts of fertilizer we applied to the algae would affect the growth rate. Also‚ we tested if fertilizer was even an impact in the growth rate of algae. Increasing the amount of the dependent variable (fertilizer) would affect the independent variable (growth of algae) negatively due to too much chemicals that are being applied to the independent variable. Which would kill the algae cells or at last damage them and either the algae would
Premium Water Oxygen Carbon dioxide
1. INTRODUCTION Research Topic A comparative study of macronutrient intake between Indonesians 16-18 from two different socio-economic groups and their links to malnutrition Research Question Is there a significant difference between macronutrient intakes of Indonesians with a high and low socio-economic status (SES) in Jakarta‚ Indonesia? Reasons For Choice of Topic During the course of the International Baccalaureate program‚ I was privileged to be able to participate in one of the CAS projects
Premium Nutrition Socioeconomic status
CDC1 Study Questions LIVING ORGANISMS CELLULAR CHEMISTRY CELL BIOLOGY GENETICS PLANT BIOLOGY INVERTEBRATES AND VERTEBRATES ECOLOGY LIVING ORGANISMS CLASSIFICATION Compare and contrast living and nonliving things. What is biology? The study of living things (science of life) Describe characteristics found in all living organisms. * Living things are made of cells. * Living things obtain and use energy. * Living things grow and develop. * Living things reproduce
Free DNA Bacteria Eukaryote
Julian Jackson Mrs. Baker AP Language & Composition 7may 2013 Argument Essay (Final Draft) Civil Disobedience is the act of disobeying authority but in a legal and civilized manner. It was introduced by writer Henry David Thoreau in his work named “Civil Disobedience.”This legal and orderly method of rebelling is often used in hope that a change will be made such as an unjust law. Many people often wonder whether Civil Disobedience still holds true in the day and age. Everyday civil disobedience
Premium Martin Luther King, Jr. Civil disobedience Henry David Thoreau
HSC Biology 9.4 The Search for Better Health 9.4-6 You have been looking at the different types of diseases that affect the human body and the natural defence mechanisms that maintain health. In this last part of the module you will look at how increased understanding has led to the development of a wide range of strategies to prevent and control disease. In this part you will have the opportunity to: • discuss the role of quarantine in preventing the spread of disease and plants and animals
Premium Disease Infectious disease Medicine
nonliving components within ecosystems; also known asnutrient cycles(i.e.‚ water cycle‚ carbon cycle‚ oxygen cycle‚ and nitrogen cycle). Biological Macromolecules A group of biomacromoleculesthatinteract with biologicalsystems and their environments. Biology The scientific study oflife. Biome A large area or geographical region with distinct plant and animal groups adapted to that
Premium DNA Gene Genetics
A central organizing concept in biology is that life changes and develops through evolution‚ and that all life-forms known have a common origin. The theory of evolution postulates that all organisms on the Earth‚ both living and extinct‚ have descended from a common ancestor or an ancestral gene pool. This last universal common ancestor of all organisms is believed to have appeared about 3.5 billion years ago.[21] Biologists generally regard the universality and ubiquity of the genetic code as definitive
Premium Evolution Charles Darwin Natural selection
ECOLOGY OF BENTHIC POLYCHAETES IN THE HEATHCOTE ESTUARY‚ NEW ZEALAND I. N. ESTCOURT New Zealand Oceanographic Institute‚ Department of Scientific and Industrial Research‚ Wellington (Received for publication 20 March 1967) SUMMARY The distributions of 19 species of polychaetes burrowing in the intertidal sand and mudbanks of the Heathcote Estuary‚ New Zealand‚ are related to salinity‚ sediment grade‚ and length of time of exposure at low tide. Only Nicon aestuariensis Knox and Scotecolepides
Premium Tide Sand
BIOLOGY (ZOOLOGY) Standard XI Untouchability is a sin Untouchability is a crime Untouchability is inhuman TAMIL NADU TEXTBOOK CORPORATION College Road‚ Chennai - 600 006. © Government of Tamilnadu First Edition - 2005 Chairperson Prof. T. SARGUNAM STEPHEN Dept. of Zoology Govt Arts College Nandanam‚ Chennai - 600 035. Reviewers Dr. D. Mony Reader in Zoology R. M. Vivekananda College Mylapore Chennai - 600 004. Dr. D. Sudarsanam Reader and H O D Dept. of Zoology Loyola College
Premium Species Organism