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  2. Blood vessel - Wikipedia

    en.wikipedia.org/wiki/Blood_vessel

    Blood vessels function to transport blood to an animal's body tissues. In general, arteries and arterioles transport oxygenated blood from the lungs to the body and its organs, and veins and venules transport deoxygenated blood from the body to the lungs. Blood vessels also circulate blood throughout the circulatory system.

  3. Blood - Wikipedia

    en.wikipedia.org/wiki/Blood

    Medical terms related to blood often begin with hemo-, hemato-, haemo-or haemato-from the Greek word αἷμα (haima) for "blood". In terms of anatomy and histology, blood is considered a specialized form of connective tissue, [8] given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen. [citation ...

  4. Human body - Wikipedia

    en.wikipedia.org/wiki/Human_body

    Diagram of the different types of soft tissue in the body The body consists of many different types of tissue , defined as cells that act with a specialised function. [ 8 ] The study of tissues is called histology and is often done with a microscope .

  5. Blood cell - Wikipedia

    en.wikipedia.org/wiki/Blood_cell

    Hemoglobin is an iron-containing protein that gives red blood cells their color and facilitates transportation of oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs to be exhaled. [3] Red blood cells are the most abundant cell in the blood, accounting for about 40-45% of its volume.

  6. Circulatory system - Wikipedia

    en.wikipedia.org/wiki/Circulatory_system

    The heart did not pump blood around, the heart's motion sucked blood in during diastole and the blood moved by the pulsation of the arteries themselves. Galen believed that the arterial blood was created by venous blood passing from the left ventricle to the right by passing through 'pores' in the interventricular septum, air passed from the ...

  7. Tunica intima - Wikipedia

    en.wikipedia.org/wiki/Tunica_intima

    The three layers of a blood vessel are an inner layer (the tunica intima), a middle layer (the tunica media), and an outer layer (the tunica externa). In dissection , the inner coat (tunica intima) can be separated from the middle (tunica media) by a little maceration, or it may be stripped off in small pieces; but, because of its friability ...

  8. Artery - Wikipedia

    en.wikipedia.org/wiki/Artery

    The anatomy of arteries can be separated into gross anatomy, at the macroscopic level, and microanatomy, which must be studied with a microscope.The arterial system of the human body is divided into systemic arteries, carrying blood from the heart to the whole body, and pulmonary arteries, carrying deoxygenated blood from the heart to the lungs.

  9. Vein - Wikipedia

    en.wikipedia.org/wiki/Vein

    In the systemic circulation the return is of deoxygenated blood from the organs and tissues of the body, and in the pulmonary circulation the pulmonary veins return oxygenated blood from the lungs to the heart. Almost 70% of the blood in the body is in the veins, and almost 75% of this blood is in the small veins and venules. [7]

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