Study Notes on Blood Regulations and Characteristics

Introduction to Blood Regulations and Characteristics

  • Discussed the importance of lab results, specifically a Complete Blood Count (CBC).
  • Chemical regulation in the blood involves maintaining a stable pH.
    • Blood regulates pH by returning it to a designated pH level (buffered state).
    • If substances are added that are too acidic or too basic, the blood buffers will neutralize these extremes.

Fluid Balance in Blood

  • Blood functions as a medium for fluid exchange between blood, cells, and tissues in the body.

Physical Characteristics of Blood

Color of Blood

  • Oxygenated Blood:
    • Appears bright red due to its oxygen content and is slightly basic, near neutral pH levels.
  • Deoxygenated Blood:
    • Will have a darker red appearance due to lower oxygen levels.

pH Range

  • Blood pH must remain within a particular range for optimal function of plasma proteins and cells:
    • Ideal pH for blood: slightly basic, close to neutral.
    • Essential for keeping proteins soluble in the blood.
  • Implications of pH levels on health:
    • Disruptions in pH can affect blood properties and functions.

Temperature of Blood

  • Blood is typically warmer than body temperature:
    • Normal body temperature: 37°C
    • Blood temperature: 38°C
    • Function: assists in heat absorption from tissues.

Composition of Blood

General Structure of Blood

  • Blood contains both cellular and non-cellular components:
    • Formed Elements (45% of blood):
    • Red Blood Cells (RBCs)
    • White Blood Cells (WBCs)
    • Platelets
    • Plasma (55% of blood):
    • The liquid component containing nutrients, hormones, and waste products.

Formation of Blood Components

  • Blood formation involves the differentiation of cell types:
    • Derived from mesenchyme during development (next topic of future discussions).
  • Blood separation process:
    • Blood sample is spun in a centrifuge to separate components.
    • Example: If a blood column measures approximately 10cm, it provides visual insight into the ratio of components.

Functions of Plasma

  • Plasma is a crucial part of blood despite being non-living:
    • Composed of water, electrolytes, proteins, and other solutes.
    • Provides a medium for essential biochemical reactions.
    • Transports various substances throughout the body.
  • Some plasma proteins are synthesized by the liver:
    • These proteins play vital roles in maintaining blood volume and pressure, immunological functions, and clotting processes.
    • Their presence in blood is essential even though they are not living cells.