What is Cholesterol?

Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication.

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Re: Regarding Diastolic and Systolic blood pressure
Re: Regarding Diastolic and Systolic blood pressure. Area: Anatomy Posted By: David Schneider, Faculty Health Sciences Date: Fri May 23 22:38:39 1997

What asanas influence blood pressure? discussion in Anatomy
These asanas can help with high blood pressure History & Philosophy of Yoga, Asanas, Yogic Physiology & Lifestyle, Anatomy & Physiology, Pranayama

Blood Pressure and Hormonal Control Mechanisms | World of Anatomy
Blood Pressure and Hormonal Control Mechanisms summary with 3 pages of encyclopedia entries, research information, and more.

Hypertension Symptoms and High Blood Pressure Diagnosis
From an understanding of the essentials of high blood pressure, to the basic anatomy and medical science underlying the disease process, every piece of

What is blood pressure? - Anatomy - Helium - by Martin W. Schwartz
Blood pressure is the differential between the push on the blood circulating in the cardiovascular system, when the ventricles by Martin W. Schwartz.

Blood pressure - Anatomy - Helium - by Grace Olivia Nordberg
DID YOU KNOW? Nearly one-third of Americans with high blood pressure are undiagnosed. There are more post menopausal women by Grace Olivia Nordberg.

Dinosaur Blood Pressure - Enchanted Learning Software
Dinosaur anatomy. Dinosaurs were land-dwelling reptiles that walked with an erect Tremendous blood pressure - It has been estimated that large sauropods

USNews.com: Health: Hypertension: Need-to-know anatomy
Need-to-know anatomy Blood pressure, the amount of tension that blood exerts on the walls of blood vessels as it travels through the circulatory system,

Anatomy Of The Heart
Anatomy Of The Heart & Cardiac Cycle. Return to ZOO 424 Home Page The blood pressure in the aorta is dropping as the volume of blood it contains drops

arm and hand blood pressure check (clinical anatomy) Stock
arm and hand blood pressure check (clinical anatomy) ,blood pressure check highlighting muscles and vessels of arm and hand. Two versions available.

The Human Circulatory System II
Link to an illustrated discussion of the anatomy of the human circulatory system. The medical term for high blood pressure is hypertension.

Anatomy & Physiology: Control of Blood Pressure - CliffsNotes
Changes in blood pressure are routinely made in order to direct appropriate amounts of oxygen and nutrients to specific parts of body.

Introductory Anatomy: Circulatory System & Blood
Introductory Anatomy: Circulatory System & Blood. Dr. D.R.Johnson These vessels provide a low pressure blood reservoir through which blood returns to

Anatomy & Physiology: Blood Pressure - CliffsNotes
Hydrostatic pressure created by the heart forces blood to move through the arteries. Systolic blood pressure, the pressure measured during contraction of

Anatomy/Regulation of Blood Pressure - Wikibooks, collection of
This is the main mechanism by which blood pressure operates. Retrieved from "http://en.wikibooks.org/wiki/Anatomy/Regulation_of_Blood_Pressure"

The Heart and the Circulatory System
cross section of blood vessels · Blood vessel anatomy . involves drugs that control the blood pressure or heart rate, artificial blood substitutes,

An Anatomy of Blood Pressure
High blood pressure is very common in the United States, where at least 50 million people are estimated to have this condition. Blood pressure is measured

Blood Pressure Cuff with Internal Organ Anatomy - Medical Illustration
This stock medical illustration shows a female in anatomical position from an anterior view with a blood pressure cuff around her upper arm.

Blood Pressure - Basic Anatomy & Physiology of the vascular system
Blood pressure is an important topic in the study of health and the body. Blod pressure is included in the IvyRose Holistic Health section about the human


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