Circulatory System By: Zoe Brecht, Zoey Pierce, Elaine Cooper, and Renna Black

Veins and Arteries Arteries are red vessels that carry blood away from the heart. There are a couple different types, which include pulmory and systemic arteries. The blood flows from the heart to various different parts of the body. Veins carry deoxygenated blood (with an exception of pulormy veins and umbilical vein. Some types of veins are superficial veins, deep veins, pulmory veins, and systemic veins. The blood flows from various parts of the body to the heart. There are thin, elastic muscle layer with semilunar valves that prevent the blood from flowing in the opposite direction. Viens are blue blood towards the heart capacitance vessels.

Vocab Hypotension: Low blood pressure Hypertension: High blood pressure Stroke: Loss of brain function, caused by the interuption of blood flow or the rupture of blood flow

The heart by: zoe, Zoey, renna, and Elaine

What the heart does.  The heart is a key organ in the circulatory system. As a hollow, muscular, pump. Its main function is to propel blood throughout the body. It usually beats from times per minute, but can go much faster when needed. It beats around 100,000 times per day, more than 30 million times per year, and about 2.5 billion times in a 70 year lifetime. The heart gets messages from the body that tell it when do pump more or less blood depending on a persons needs.

Where the heart lies.  The heart has 4 chambers that are enclosed by thick, muscular walls. It lies between the lungs and just to the left of the middle of the chest cavity. The bottom part of the heart is divided into 2 chambers called the right and left ventricles, which pump blood out of the heart. A wall called the interventricular septum divides the ventricles.

What the heart is made of.  The heart is made up of four different blood filled areas. The two chambers on the top are called the atria (AY- TREE-UH). The right and left atria receive the blood entering the heart. Two other cardiac valves separate the ventricles and the large blood vessels that carry blood leaving the heart. These are the pulmonic valve, which separates the right ventricle from the pulmonary artery leading to the lungs, and the aortic valve, which separates the left ventricle from the aorta, the body's largest blood vessel.

blood By Elaine

Red blood cells Most of the cells in blood are red blood cells. They carry around an important chemical called hemoglobin that gives off its red color. The hemoglobin in blood delivers oxygen, which you get from the air you breathe, to all the parts of alive.

White blood cells White blood cells are bigger then red blood cells, Once your sick, your body makes more white blood cells to protect you. There are many white blood cells in your body.

Types of white blood cells  Granulocytes- Granulocytes are phagocytes, that are they are able to ingest foreign cells such as bacteria, viruses and other parasites. Lymphocytes- Lymphocytes are cells which help to regulate the body's immune system  Monocytes- Monocytes can develop into two types of cells: Dendritic cells and Macrophages cells.

Types of blood  Types of blood; A negative A positive B negative B positive O negative O positive Ab negative Ab positive

What is blood? Blood is basically a type of connected tissue which is found in the human body in fluid state. It is made of plasma which is highly vicious liquid. On average people have approximately 5.5 liters of blood.

Capillaries and Diseases You know who wrote this… if you don’t then it was the internet #-#

Capillaries  Are the smallest of the body's blood vessels. They are only one cell thick and they are the site of the transfer of oxygen and of the nutrients from the blood stream to other tissues in the body; they also collect carbon dioxide waste materials and fluids for return to the veins.

Diseases  Atherosclerosis-literally ‘hardening of the fatty stuff; high fat diets can lead to formation of fatty plaques lining blood vessels. Causes: High Blood Pressure. High levels of cholesterol. Smoking. High levels of sugar in the blood W0z3RKncr4