Circulation
Circulation refers to the movement of substances, such as blood, gases, and nutrients, throughout the body. In the context of the human body, circulation primarily refers to the circulatory system, which is responsible for the transport of blood, oxygen, and nutrients to the body's tissues and organs. The circulatory system is composed of the heart, blood vessels, and blood.
Components of the Circulatory System
- Heart: The muscular organ that pumps blood throughout the body. It consists of four chambers: the left and right atria, and the left and right ventricles.
- Blood Vessels: The network of tubes that carry blood throughout the body. There are three main types of blood vessels: arteries, veins, and capillaries.
- Blood: A fluid connective tissue that carries oxygen, nutrients, hormones, and waste products throughout the body. It is composed of plasma, red blood cells, white blood cells, and platelets.
Functions of the Circulatory System
- Transportation: The circulatory system transports oxygen from the lungs to the body's tissues, and carries carbon dioxide from the tissues back to the lungs for exhalation. It also transports nutrients from the digestive system to the body's cells, and carries waste products to the excretory organs for elimination.
- Regulation: The circulatory system helps regulate body temperature, pH balance, and fluid balance within the body.
- Protection: The circulatory system plays a key role in the body's immune response, and helps to protect the body from infections and diseases.
Disorders of the Circulatory System
There are several disorders that can affect the circulatory system, including:
- Hypertension: High blood pressure, which can lead to an increased risk of heart disease and stroke.
- Coronary Artery Disease: A condition caused by the buildup of plaque in the coronary arteries, leading to reduced blood flow to the heart muscle.
- Heart Failure: A condition in which the heart is unable to pump enough blood to meet the body's needs.
- Peripheral Artery Disease: Narrowing of the arteries that supply blood to the legs, arms, stomach, or kidneys.
Study Guide
When studying the topic of circulation, it is important to understand the structure and function of the circulatory system, as well as the various disorders that can affect it. Here are some key points to focus on:
- Describe the structure and function of the heart, including the flow of blood through its chambers and the pulmonary and systemic circuits.
- Explain the functions of arteries, veins, and capillaries, and how they contribute to the overall function of the circulatory system.
- Discuss the composition of blood and its role in transporting oxygen, nutrients, and waste products throughout the body.
- Identify and describe common disorders of the circulatory system, including their causes, symptoms, and potential treatments.
- Understand the importance of a healthy lifestyle, including diet and exercise, in maintaining cardiovascular health and preventing circulatory system disorders.
By mastering these key points, you will have a comprehensive understanding of the circulation topic and its significance in the human body.
.◂Chemistry Worksheets and Study Guides High School. The Science of Chemistry
Worksheet/Answer key
The Science of Chemistry 
Worksheet/Answer key
The Science of Chemistry Worksheet/Answer key
The Science of Chemistry
Worksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Nature of Science
The Practice of Science - A: Scientific inquiry is a multifaceted activity; The processes of science include the formulation of scientifically investigable questions, construction of investigations into those questions, the collection of appropriate data, the evaluation of the meaning of those data, and the communication of this evaluation. B: The processes of science frequently do not correspond to the traditional portrayal of ''the scientific method.'' C: Scientific argumentation is a necessary part of scientific inquiry and plays an important role in the generation and validation of scientific knowledge. D: Scientific knowledge is based on observation and inference; it is important to recognize that these are very different things. Not only does science require creativity in its methods and processes, but also in its questions and explanations.
Define a problem based on a specific body of knowledge, for example: biology, chemistry, physics, and earth/space science, and do the following:
Use tools to gather, analyze, and interpret data (this includes the use of measurement in metric and other systems, and also the generation and interpretation of graphical representations of data, including data tables and graphs)