An overview of the circulatory system

The oxygen-rich blood then flows from the left atrium to the left ventricle. Examples of Systems It's easy to point out a few in your body. Introduction to Cardiovascular System: There's a good chance you've seen them. This results in the continuous exchange of oxygen-rich blood with oxygen-poor blood that is necessary to keep you alive.

Contraction is called systole, and relaxation is called diastole. Lightly apply the bell of the stethoscope over the course of the carotid artery, from the base of the neck to angle of the jaw, during full expiration. Blood contains platelets which are essential for clotting the blood, which occurs following an injury to stop blood loss.

It is nondisplaced, sustained occupying more than one-half of systoleand 2 to3 cm quarter-sized. These animals may have similar physical examination findings such as pale mucous membranes and weak peripheral pulses.

Then move the diaphragm to the second and third left intercostal spaces in order to appreciate the aortic and pulmonic components of S2, the pulmonary ejection sound, and the murmurs of pulmonic stenosis and pulmonary and aortic regurgitation.

The pulmonary arteries come to the lungs directly from the heart, from the right ventricle. Thus, doctors may check patients for swollen lymph nodes, which may indicate an active immune response. It may be difficult or impossible to palpate in obese or very muscular individuals.

Your heart is divided into four chambers. They are similar to mosses in that An overview of the circulatory system need liquid to reproduce. While listening to the heart sounds, the examiner carefully and slowly applies more and more pressure to the carotid artery until the maximum pulse is felt; palpation should be continued for 5 to 8 seconds.

The aorta divides into smaller arteriesthen arterioles and finally into microscopic capillaries, found deep within muscles and organs. While ferns are soft, horsetails are rough plants and even have silica silicon-based compound in their epidermal cells.

Blood consists of two major portions: Auscultation of the peripheral arteries is also very important.

Cardiovascular System

The impulse is usually sustained throughout systole, frequently with a second systolic bulge, and is often difficult to distinguish from that of left ventricular hypertrophy by palpation alone if the bulge occurs in the region of the apex.

In fact push of the heart is the major force that causes circulation of blood throughout human body. Most deep vein thromboses are clinically silent and cannot be detected by routine examination. The pulse rhythm should be regular, since alternation of the strength of cardiac beats commonly results from bigeminal rhythm.

Abnormalities in RBC morphology, such as basophilic stippling, can indicate lead intoxication. There are three main types of blood vessels; Arteries, Capillaries and Veins. Together, your heart and blood vessels make up your cardiovascular system, which circulates blood and oxygen around your body.

Your kidneys are not only a part of your excretory system ; they also have specific parts that serve the endocrine system. Left ventricular hypertrophy, for instance, results in exaggeration of the normal left ventricular thrust both in amplitude and duration.

On rare occasions the impulse may be visible in the right chest, providing the initial clue to the presence of dextrocardia. This test is best performed with the patient lying comfortably in bed at the optimal angle for observing the internal jugular venous pulsations.

Overview of the Immune System

Plasma is the watery portion of blood that makes it a fluid. Several additional areas should be ausculted Figure 7. Relax the neck muscles by placing a small pillow behind the neck.

The technique known as inching may help determine whether extra cardiac sounds are systolic or diastolic. The normally visible jugular venous pulsations consist of two outward pulsations or positive waves "a" and "v" and two descents or collapses or negative waves "x" and "y" as shown in Figure 7.

The oxygen-poor blood fills the right atrium and then flows to the right ventricle, where it is pumped to the lungs through the pulmonary arteries.

It is important that the carotid pulses be palpated using light pressure, one side at a time, since bilateral carotid compression may produce cerebral ischemia and syncope; extreme caution should be exercised in patients who have a history of syncope or transient neurologic symptoms.

The second heart sound Chapter 23 identifies the end of systole and the onset of diastole. The lymphatic system is a network of vessels and tissues composed of lymph, an extracellular fluid, and lymphoid organs, such as lymph nodes.

The brain, spinal cord and eye Some parts of the body have circulating fluids that are not in direct contact with the systemic circulation.The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart.

It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again. Overview The cardiovascular system is composed of the heart and the network of arteries, veins, and capillaries that transport blood throughout the body.

The average adult male has between 5 to 6 liters of blood or blood volume, while the average adult female has between 4 to 5 liters.

A Medical Guide to the Circulatory Sytem - For Kids!

What is the Human Circulatory System? We explain an overview of the circulatory system including its functions, how it transports oxygen and other nutrients around the body as well as the differences between systemic and circulatory elements. In insects, the circulatory system is open but this system does not participate in the gas exchange process or in oxygen supply to tissues.

Gases enter and exit through the independent tracheal system, which allows for the direct contact of cells with the ambient air.

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

A simple example is the connection between the circulatory and respiratory systems. As blood circulates through your body, it eventually needs fresh oxygen (O 2) from the air.

When the blood reaches the lungs, part of the respiratory system, the blood is re-oxygenated.

An overview of the circulatory system
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