1 / 168

Circulatory System

Circulatory System. The human circulatory system is composed of three major components: a. the heart (pump) b. a system of vessels ( arteries, veins, capillaries, venules and arterioles) c. fluid (blood).

malik-melton
Download Presentation

Circulatory System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Circulatory System

  2. The human circulatory system is composed of three major components: a. the heart (pump) b. a system of vessels ( arteries, veins, capillaries, venules and arterioles) c. fluid (blood)

  3. Every part of the body is made up of tiny units of living matter called cells. The human body has approximately 50 to 100 trillion cells which require oxygen and nutrients. These cells must also eliminate waste gases and material.

  4. Nutrientsand oxygen are carried to all body cells by the blood. The blood is pumped by the heart through various vessels. • Waste material and carbon dioxide are also eliminated from the body by the circulatory system.

  5. As the blood is transported through the body, most of it goes to the muscle cells which remove food materials and oxygen. Large amounts also go to the brain and smaller amounts to other parts which also require food and oxygen.

  6. There are two basic circulatory patterns in humans: Systemic circulation Pulmonary circulation

  7. Systemic circulation carries oxygenated blood from the left ventricle to all parts of the body. Blood from systemic circulation returns in a deoxygenated form to the right atrium.

  8. Pulmonary circulation takes deoxygenated blood from the right ventricle to the lungs. • The blood becomes oxygenated and returns to the left atrium.

  9. The heart must beat constantly to perform these functions. Approximately 70 beats per minute if the body is relaxed and more beats when the body is active or under stress.

  10. The Heart: The heart is a hollow muscular pear-shaped organ located in the middle of the chest beneath the sternum and between the lungs.

  11. The heart pumps blood through the body, supplying cells with oxygen and nutrients and removing carbon dioxide and nitrogen containing waste.

  12. A B

  13. The heart is held in place principally by its attachment to the great arteries and veins, and by its confinement in the pericardium. (pericardial sac)

  14. The pericardium is a double walled sac with one layer enveloping the heart and the other attached to the breastbone, the diaphragm, and the membranes of the thorax. The pericardium protects the heart form friction and trauma.

  15. The adult human heart is approximately the size of a fist and about the shape of your hand. In an average adult, it is about fifteen centimeters long and seven centimeters across at its broadest part, and it weighs less than one- half a kilogram. (APPROXIMATELY .43 % OF THE BODY MASS)

  16. Unlike other organs the heart is unable to slow down when it does not receive enough nourishment from the blood. It must continue to beat, pumping blood, no matter the demands placed upon it. This may lead to serious heart problems, including a potentially deadly heart attack.

  17. Good coronary circulation is very important. Chest pain (angina) will occur when the heart is not receiving enough oxygen. This could possibly be a result of a blocked artery, inhibiting the flow of nutrient and oxygen rich blood to the heart. A complete blockage results in a heart attack. ( coronary occulsion )

More Related