Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2
Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2
CHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2is a specialized connective tissue consisting of cells and fuid extracellular material called plasma. Propelled mainly by rhythmic contractions of the heart, about 5 L of blood m an average adult moves unidirectionally within the closed circulatory system. T e so-called formed elements circulating i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2n the plasma are erythrocytes (red blood cells), leukocytes (white blood cells), and platelets.When blood leaves the circulatory system, either in a tEbook Junqueira''s basic histology a text and atlas (14/E): Part 2
est tube or in the extracellular matrix (ECM) surrounding blood vessels, plasma proteins react with one another to produce a clot, which includes formCHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2ch confer biological properties very different from those of plasma.Collected blood in which clotting is prevented by the addition of anticoagulants (eg, heparin or citrate) can be separated by centrifugation into layers that refect its heterogeneity (Figure 12-1). Erythrocytes comprise the sediment Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2ed material and their volume, normally about 44% of the total blood volume in healthy adults, is called the hematocrit.T e straw-colored, translucent,Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2
slightly viscous supernatant comprising 55% at the top lialf of the centrifugation tube is the plasma. A thin gray-white layer called the buffy coat CHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2ributing vehicle, transporting o,. co., metabolites, hormones, and other substances to cells throughout the body. Most o, is bound to hemoglobin in erythrocytes and is much more abundant in arterial than venous blood (Figure 12-2). while co. is carried in solution as CO. or HCO." in addition to bein Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2g hemoglobin-bound. Nutrients are distributed from their sites of synthesis orabsorption in the gut. while metabolic residues are collected from cellsEbook Junqueira''s basic histology a text and atlas (14/E): Part 2
throughout the body and removed from the blood by the excretory organs. Hormone distribution in blood permits the exchange of chemical messages betweCHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2nce of acid-base and osmotic balance.Leukocytes have diverse functions and are one of the body's chief defenses against infection. T ese cells are generally spherical and inactive while suspended in circulating blood, but. when called to sites of infection or in f animation, they cross the wall of v Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2enules, become motile and migrate into the tissues, and display their defensive capabilities.^COMPOSITION OF PLASMAPlasma is an aqueous solution. pH 7Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2
.4. containing substances of low or high molecular weight that make up 7% of its volume. As summarized in Table 12-1. the dissolved components are mosCHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2electrolytes. T rough the capillary walls, the low-molecular-weight components of plasma are in equilibrium with the interstitial fuid of the tissues. T e composition of plasma is usually an indicator of the mean composition of the extracellular fuids in tissues.T e major plasma proteins include the Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2 following:I Albumin, the most abundant plasma protein, is made in the liver and serves primarily to maintain the osmotic pressure of the blood.I GlobEbook Junqueira''s basic histology a text and atlas (14/E): Part 2
ulins (a- and p-globulins). made by liver and other cells, include transferrin and other transport237238CHAPTER »2 ■ Bloodí IGURE 12-1 Composition of CHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood i Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2lutes 1% by weight Etectrotytes Nutrients Respiratory gases Waste productsButty coat (<1% ot whole blood)Platelets 150-400 thousand per cubrc mmNeutrophis 50-70%Leukocytes 4.5-11 thousand per cubic mmLymphocytes 20-40%Eosinophils 1-4% Ebook Junqueira''s basic histology a text and atlas (14/E): Part 2CHAPTER12 BloodCOMPOSITION OF PLASMABLOOD CELLSErythrocytes Leukocytes Platelets237SUMMARY OF KEY POINTS239ASSESS YOUR KNOWLEDGE239241247250252Blood iGọi ngay
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