Cytology · MU Pleven

Topic 33- Blood and lymph – blood and lymph plasma: contents, antibodies.

Covers blood as a connective tissue, where it is found, and its composition: cell fractions, haematocrit values and the water, protein and solute makeup of plasma. It then goes through the plasma proteins, including albumin, fibrinogen and the globulins, with the immunoglobulin classes and how antibodies are produced by B-cells. Finally it describes lymph, its composition, its transport role and the function of lymph nodes.

Inside: 4 sections · 3 labelled pictures · 13 flashcards · 5 min

Topic 33 of 59 in the MU Pleven syllabus for Cytology (Medicine, Year 1). The free AceMed note covers it in 4 sections, about 671 words (5 min of reading), with 13 flashcards.

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  1. TOPIC 33- Blood and lymph – blood and lymph plasma: contents, antibodies.
  2. Composition of blood
  3. Solutes
  4. Lymph and its components

TOPIC 33- Blood and lymph – blood and lymph plasma: contents, antibodies.

Blood tissue is a specialised form of connective tissue which is mainly responsible for the transport and delivery of metabolites.

Location: Blood tissues are found inside blood vessels (arteries, arterioles, capillaries, veins and venules) and within the heart chambers. Some white blood cells are also found in other tissues such as adipose tissue, lymphocytes can be found in the lymphatic system.

Blood consists of various blood cells and extracellular fluid called plasma.

Composition of blood

  • Amount of blood: 4 – 6 litres, 7-8% of body weight
  • Blood is composed of plasma and blood cells.
  • Plasma proteins: albumins - maintaining the osmotic pressure.
  • Globulins. Fibrinogen - works in blood clotting. Lipoproteins -
  • HDL, LDL - complement proteins.

Erythrocytes (RBC) – 96%,

Leukocytes (WBC) – 3%

Platelets– 1%

The haematocrit is the volume percentage (%) of red blood cells in blood.** (imp)

  • 36–48% in women.
  • 42–52% in men.
  • 44–64 % new-born baby.

Blood plasma contents:

  • Plasma contains mainly water 92%,
  • plasma proteins 7% and
  • other solutes 1%

Water is the solvent in which the proteins and solutes are dissolved

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