Blood Definition. Describe the structure and function of blood in the body. Blood is a complex liquid tissue. Blood tissue contains all the blood in a living body. In the foetus, blood cells are produced by the bone marrow, liver, spleen and thymus. Tissues such as skeletal muscle , liver , and kidney have extensive capillary networks because they are metabolically active and require an abundant supply of oxygen and nutrients. They provide internal support as well as give and maintain form to the body. Capillary distribution varies with the metabolic activity of body tissues. White blood cells protect against disease. Adipose cells of connective tissue store energy in the form of fat. They transport fluids, nutrients, waste, and chemical messenger to and from the different parts of the body. It is composed of variety of cells, fibre (non-living products of cell) and semi-solid matrix between cells. It is also involved in the body’s immune response. Fluid connective tissues circulate in the cardiovascular system and their function is to transport essential nutrients, hormones, wastes, and gases. Blood is a fluid connective tissue critical to the transportation of nutrients, gases, and wastes throughout the body; to defend the body against infection and other threats; and to the homeostatic regulation of pH, temperature, and other internal conditions. As the name indicates, it is highly elastic with an ability to recoil after extension. Blood Explore study unit Oxygen supply and carbon dioxide removal. Blood tissue is in a packing tissue known as Plasma which is a liquid of pale straw color. Blood is the body fluid in humans and other animals that delivers the essential materials for life to the body’s cells. Blood is important for regulation of the body’s pH, temperature, osmotic pressure, the circulation of nutrients and removal of waste, the distribution of hormones from endocrine glands, and the elimination of excess heat; it also contains components for blood clotting. Blood Tissue. The primary function of capillaries is the exchange of materials between the blood and tissue cells. Different kinds of tissue have different physical properties. Another example of a hydraulic function is the jumping spider , in which blood forced into the legs under pressure causes them to straighten for a powerful jump, without the need for bulky muscular legs. Red blood cells also carry carbon dioxide, a waste product, to the lungs, where it is excreted. This fluid occupies the intracellular space and forms the connecting link in the transport of nutrition, gases and the metabolic end products between blood capillaries, tissue cells and the lymph. Because of the higher gas pressure in the plasma (relative to the cells), it diffuses to the tissues. Blood has many functions to play in the body. Blood is called a fluid connective tissue because it develops from the mesoderm of the embryo like any other typical connective tissue and connects all the organ systems of the body by transporting oxygen, nutrients, hormones, etc., and removing wastes from these organs. Although gap junctions allow this tissue to function as a syncytium, each cell has one, centrally located nucleus. Fluid or liquid connective tissue: blood and lymph 1. Blood is a sticky fluid with a salty taste. This changes during and after birth. There are two basic types of fluid connective tissues and they are the blood and lymph. Composition of Tissue Fluid 3. Thromboplastin defines the cascade that leads to the activation of factor X—the tissue factor pathway. Tissue factor, also called platelet tissue factor, factor III, or CD142, is a protein encoded by the F3 gene, present in subendothelial tissue and leukocytes.Its role in the clotting process is the initiation of thrombin formation from the zymogen prothrombin. The barriers have a well defined anatomic substrate: for the blood-brain-, the inner blood- retina and the blood-thymus-barrier it is the endothelium, for the blood-placenta-, the outer blood-retina-, the blood-testis- and the blood-thymus-barrier these are epithelial cells in the vicinity of the capillary. Almost all animals have blood inside their bodies. Bottomline. Functions of blood cells . There are 4 types of animal tissues as Muscle Tissue, Nerve Tissue, Epithelial Tissue and finally Blood Tissue.So that means today I’m going to go deeper about the blood tissue of human beings. Red blood cells (RBC) or Erythrocytes. The more metabolically active a tissue is, the more capillaries are required to supply nutrients and carry away products of metabolism. Learn vocabulary, terms, and more with flashcards, games, and other study tools. It consists of a liquid matrix called the plasma, in which blood cells are present. Created with BioRender.com. Red blood cell, cellular component of blood that carries oxygen from the lungs to the tissues and gives vertebrates’ blood its characteristic color. A. They are widely distributed and connected to the primary tissues. Red Blood Cells and Platelets. It is bright red in arteries and darker and purple colored in the veins. Transport O2 from lungs to all respiring tissues. Smooth muscle. Additionally, blood vessels provide the ideal network for immune system surveillance and distribution. The restriction of blood flow can also be used in specialized tissues to cause engorgement, resulting in an erection of that tissue; examples are the erectile tissue in the penis and clitoris. The blood cells include Humans belong to the natural classification group of Animals. Connective tissues are the most abundant tissues in the body. Haemopoietic tissues refer to the tissues that produce blood. Blood vessels also facilitate the rapid distribution and efficient transport of factors such as glucose, amino acids, or lipids into the tissues and the removal of waste products for processing elsewhere, such as lactic acid to the liver or urea to the kidneys. Subcutaneous tissue. Specialized connective tissues such as blood and lymph work as a transport medium. Blood is a fluid connective tissue. The connective tissue mainly consists of blood, bones, and areolar tissue. Blood is composed of blood corpuscles (45%) and blood plasma(55%) An average person has 5-6 ltr of blood. Many of the white blood cells leave the blood vessels and migrate into the connective tissue and epithelia. Produced at a very fast rate – about 9000 million per hour! Smooth muscle tissue is associated with arteries and tubular organs such as the intestinal tract. 1.Red blood cells (erythrocytes) Made in the bone marrow of some bones, including ribs, vertebrae and some limb bones. The blood transports the oxygen from the alveoli to the remotest cells of the body. Capillaries are tiny blood vessels that play a big role in facilitating the exchange of various substances between your bloodstream and tissues. Definition and Sources of Tissue Fluid: Tissue fluid is formed from the plasma by process of diffusion and filtration. Blood platelets help the blood to clot. Blood is a specialized body fluid. The earliest haemopoietic tissue to develop is the yolk sac, which also functions in the transfer of yolk nutrients of the embryo. This tissue contains a number of blood cells namely red blood cells and white blood cells. Blood. It transports oxygen, dissolved substances and heat around the body. It is composed of blood cells (45%) and plasma (55%). Every tissue in the body needs a blood supply. Elastic tissue. Red blood cells transport oxygen. Connective tissues are the major supporting tissue of the body. Characteristics of connective tissue: Connective tissue ranges from avascular to highly vascular. Blood cells are crucial for various functions of blood like transporting oxygen and other essentials, protecting against antigens, and restoring tissues in the body. As the name suggests a connective tissue acts as a connecting medium, with some specialized functions. Start with the structure and function of blood with our study unit. Subcutaneous tissue is well-vascularized, meaning that it’s filled with blood vessels. Start studying Connective tissue functions and locations. It has four main components: plasma, red blood cells, white blood cells, and platelets. The mature human red blood cell is small, round, and biconcave. You need to be able to differentiate between the different types of blood cells, and know something about their functions. Let us learn about some connective tissues - Blood… Blood cells are the cells which are produced during hematopoiesis and found mainly in the blood. The cells of blood tissue are classified as erythrocytes, leukocytes, and thrombocytes. So it can be said blood is an important lifeline. In animals, the connective tissue is very complex has a vital role. Blood. The deepest layer of skin is made of connective tissue and fat. Objectives. Types of Blood cells. Functions 4. The types of cells found in connective tissue vary depending on the type of tissue they support. The special function of a tissue is also influenced by the kind of material that surrounds the tissue and by communication among the cells of the tissue. It travels all around the body in specialized blood vessels. Epithelial tissue is divided into two types: Covering and lining epithelium, also called the surface epithelium, that forms the outer covering of the skin and some internal organs and also forms the inner lining of blood vessels, ducts, body cavities, and the inner lining of the respiratory, digestive, urinary, and reproductive systems. Blood is composed of the blood cells which accounts for 45% of the blood tissue by volume, with the remaining 55% of the volume composed of plasma, the liquid portion of the blood. It has sometimes been called a fluid “tissue,” because like solid tissues it contains several types of cells which perform complex functions for the human body. It has elastic fibers in its matrix and is found in the lungs, trachea, bronchi and the walls of large blood vessels. Tissues may be hard (bone), soft (muscle), or even liquid (blood). Aggregation. 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