Blood

• What is the primary function of red blood cells?

  Carry oxygen
• How do red blood cells transport oxygen throughout the body?


  They carry oxygen from the lungs to all the cells in the body
• Why is the shape of red blood cells important for their function?


  It gives them a large surface area for absorbing oxygen
• What substance do red blood cells contain that allows them to carry oxygen?

  Haemoglobin
• Why do red blood cells not have a nucleus?

  To provide more space for carrying oxygen
• What is the primary function of white blood cells?

  Defend against infection
• What role do white blood cells play in the immune system?


  They are part of the immune system
• How do some white blood cells defend against microorganisms?

  Some eat unwelcome microorganisms or produce antibodies and antitoxins
• What cellular structure do white blood cells have that red blood cells do not?

  A nucleus
• What is plasma in the context of blood?

  A liquid that carries everything in blood
• What color is plasma, and what does it carry?

  It is pale straw-colored and carries red and white blood cells, platelets, food molecules, waste products, hormones, and proteins
• What are the components carried by plasma in the blood?


  • Red blood cells
  • White blood cells
  • Platelets
  • Food molecules
  • Waste products
  • Hormones
  • Proteins
• What is homeostasis?


  • The process of maintaining a stable internal environment
  • Involves regulation of temperature, pH, and other vital conditions
• What is the role of the nervous system in homeostasis?


  • It detects changes in the environment
  • It coordinates responses to maintain balance