Blood Composition And Function Pdf


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18.12.2020 at 01:18
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blood composition and function pdf

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Blood , fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart or an equivalent structure to all parts of the body, after which it is returned to the heart to repeat the process. Blood is both a tissue and a fluid. It is a tissue because it is a collection of similar specialized cells that serve particular functions. These cells are suspended in a liquid matrix plasma , which makes the blood a fluid.

Blood is made of of several components, including red blood cells, white blood cells, platelets, and the plasma, which contains coagulation factors and serum. Blood helps maintain homeostasis by stabilizing pH, temperature, osmotic pressure, and by eliminating excess heat. Blood supports growth by distributing nutrients and hormones, and by removing waste. These cells deliver oxygen to the cells and remove carbon dioxide. Blood plays a protective role by transporting clotting factors and platelets to prevent blood loss after injury.

Blood is a connective tissue that helps in the transportation of substances, protects against diseases and regulates the temperature of the body. Do you know why the colour of blood is red? It is red in colour due to a red pigment called haemoglobin present in its red cells. Plasma is a liquid also known as the fluid matrix and consists of three types of cells that keep floating in it namely red blood cells, white blood cells, and platelets. Blood has three main functions in the human body i. On average, a healthy man has about 5 litres of blood in the body, while a woman has about ml less than man.

Blood function and composition

Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including:. The blood that runs through the veins, arteries, and capillaries is known as whole blood, a mixture of about 55 percent plasma and 45 percent blood cells. About 7 to 8 percent of your total body weight is blood. An average-sized man has about 12 pints of blood in his body, and an average-sized woman has about nine pints.

Blood is a combination of plasma and cells that circulate through the entire body. It is a specialized bodily fluid that supplies essential substances around the body, such as sugars, oxygen, and hormones. Hematologists work to identify and prevent blood and bone marrow diseases, as well as studying and treating the immune system, blood clotting, and the veins and arteries. In the United States U. This constitutes less than one percent of total deaths from disease. Plasma: This constitutes approximately 55 percent of blood fluid in humans.

1. Composition of Blood and its Functions

When a sample of blood is spun in a centrifuge , the cells and cell fragments are separated from the liquid intercellular matrix. Because the formed elements are heavier than the liquid matrix, they are packed in the bottom of the tube by the centrifugal force. The light yellow colored liquid on the top is the plasma , which accounts for about 55 percent of the blood volume and red blood cells is called the hematocrit ,or packed cell volume PCV.

Blood is a suspension of blood elements erythrocytes, leukocytes, and platelets in blood plasma. Blood elements can be separated from blood plasma using centrifugal force. Figure shows that the most descended are erythrocytes — the volume of erythrocytes in a sample of blood is called the hematocrit. Above the erythrocyte layer is found the white non-transparent layer composed of leukocytes and thrombocytes. In our blood vessels circulate about 4.

Identify the primary functions of blood, its fluid and cellular components, and its characteristics. Recall that blood is a connective tissue. Like all connective tissues, it is made up of cellular elements and an extracellular matrix. The cellular elements—referred to as the formed elements —include red blood cells RBCs , white blood cells WBCs , and cell fragments called platelets. The extracellular matrix, called plasma , makes blood unique among connective tissues because it is fluid.

Blood Basics

Какого черта. Он кивнул. - Si, echame un poco de vodka. Бармен с видимым облегчением приготовил ему напиток. Беккер оглядел затейливое убранство бара и подумал, что все, что с ним происходит, похоже на сон.

На ее пальце было не кольцо Танкадо. Это было другое кольцо - платиновое, с крупным сверкающим бриллиантом. Сьюзан охнула.

Копия, которую он разместил, зашифрована. Ее можно скачать, но нельзя открыть. Очень хитро придумано.

Неожиданно он оказался на открытом воздухе, по-прежнему сидя на веспе, несущейся по травяному газону. Задняя стенка ангара бесследно исчезла прямо перед. Такси все еще двигалось рядом, тоже въехав на газон. Огромный лист гофрированного металла слетел с капота автомобиля и пролетел прямо у него над головой. С гулко стучащим сердцем Беккер надавил на газ и исчез в темноте.

Разумеется, это кличка. - Да, но я на всякий случай заглянул в Интернет, запустив поиск по этим словам. Я не надеялся что-либо найти, но наткнулся на учетную запись абонента.  - Он выдержал паузу.  - Я, конечно, предположил, что это не та Северная Дакота, которую мы ищем, но на всякий случай проверил эту запись.

Он пошел на звук и уткнулся в стеклянную дверь, за которой, судя по доносящемуся оттуда шуму и гвалту, происходило нечто вроде драки. Преодолев отвращение, Беккер открыл дверь. Регистратура.

Джабба рассмеялся. - Не кажется ли тебе, что это звучит как запоздалое эхо. Она тоже засмеялась.

4 Comments

Amanda B.
20.12.2020 at 05:01 - Reply

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Bertrand A.
20.12.2020 at 06:56 - Reply

Blood. I. Composition/function. A. Introduction. - 8% body volume; specialized connective tissue where cells are formed elements and plasma is extracellular.

Janet T.
20.12.2020 at 08:25 - Reply

- Blood is a viscous fluid formed of cellular element suspended in plasma. cells), and Platelets. - Plasma is a viscous, translucent, yellowish fluid composed of water (90%), proteins (7%), organic salts (1%), and organic compound (2%) such as amino acids, lipids, and vitamins.

Aram A.
27.12.2020 at 06:16 - Reply

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