CARDIOVASCULAR SYSTEM

Cardiovascular system

Cardiovascular system

Introduction

The main significance of the cardiovascular system is the blood supply of organs and tissues. Blood is continuously moving through the vessels, which gives it the ability to perform all vital functions. Go to the circulatory system are the heart and blood vessels - blood and lymph.

The Heart is a biological pump, thanks to the work that blood moves in a closed system of vessels. Every minute the heart pumps the blood stream of about 6 liters of blood per day - more than 8 thousand liters per lifetime (with an average duration - 70 years) - about 175 million liters of blood.

The system of automaticity of the heart

As we know the heart is able to shrink or to work outside the body, ie isolation. The truth is, it can perform a short time. When you create normal conditions (food and oxygen) for it to work, it can be reduced almost to infinity. This ability of the heart is associated with a particular structure and metabolism. In the heart of the distinction working muscles, provided the striated (Figure) muscle and the special fabric, which arises and is conducted stimulation.

The special fabric is composed of undifferentiated muscle fibers. In certain areas of the heart showed a significant number of nerve cells, nerve fibers and their endings, which here form a nervous network. Clusters of nerve cells in certain parts of the heart called nodes. These sites are suitable nerve fibers of the autonomic nervous system (vagus and sympathetic nerves). In higher vertebrates, including humans, atypical tissue consists of:

1. Located in the ear of the right atrium, sinoatrial node, a leading site ("Pace mekker" I order) and send impulses to the two atria, causing them to systole;

2. atrio-ventricular node (atrioventricular node), located in the wall of the right atrium near the septum between the atria and ventricles;

3) atrioventricular bundle (bundle branch block)

Analysis of results

We are required to produce a report that analyses the following results and relate the results to one of the systems provided and explanation of the relevance of the tests and the results on the system.

Component

Result

Age

22

Sport

Footballer

Position

Midfielder

Resting Heart rate

42 bpm

Blood pressure (at rest)

108per76 mmHg

Breathing frequency (at rest)

14 bpm

V02 max

57mlperkgpermin

1 rep maximum test - squat

100kg

1 rep maximum test - bicep curl

35kg

Bleep test score

Level 13 shuttle 5

Results

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Application of results to chosen system:

Football players require a combination of technical as well as tactical and physical skills for ...