1.1.3 Blood Composition

• What type of tissue is blood classified as?

  Connective tissue
• Blood consists only of plasma and erythrocytes.

  False
• Match the blood component with its description:

  Plasma ↔️ Liquid portion, transports substances

  Erythrocytes ↔️ Red blood cells, carry oxygen

  Leukocytes ↔️ White blood cells, immune response

  Thrombocytes ↔️ Platelets, blood clotting
• What is the primary function of plasma in blood?

  Substance transport
• Erythrocytes contain a nucleus.

  False
• Leukocytes are part of the immune system
• What role do thrombocytes play in blood?

  Blood clotting
• Plasma constitutes about 55% of blood volume
• What is the role of water in plasma?

  Solvent
• Proteins in plasma are responsible for transporting lipids and hormones.
• Order the key features of erythrocytes from most to least important for oxygen transport:

  1️⃣ Biconcave disk shape

  2️⃣ Lack of nucleus
• Why do erythrocytes lack a nucleus?

  More space for hemoglobin
• What is another name for red blood cells?

  Erythrocytes
• The biconcave disk shape of red blood cells increases their surface area for gas exchange
• The biconcave disk shape of erythrocytes enhances oxygen diffusion.
• What does the lack of a nucleus in red blood cells allow for?

  More hemoglobin
• The flexible cell membrane of red blood cells enables them to deform and pass through narrow capillaries
• What protein in red blood cells binds oxygen?

  Hemoglobin
• Structural features of erythrocytes enable efficient oxygen transport throughout the body.
• What is another name for white blood cells?

  Leukocytes
• Match the feature of white blood cells with its function:

  Nucleus ↔️ Directs cell activity

  Granules ↔️ Destroy pathogens

  Amoeboid movement ↔️ Move to infection sites

  Immune response ↔️ Defends against pathogens
• Amoeboid movement allows white blood cells to change shape and move to infection sites.
• What type of tissue is blood classified as?

  Connective tissue
• Order the functions of blood as described in the study material:

  1️⃣ Transport

  2️⃣ Immunity

  3️⃣ Homeostasis
• Plasma is the liquid component of blood that transports substances throughout the body.
• Which blood cell carries oxygen?

  Erythrocytes
• Plasma constitutes about 55% of blood volume.
• What role do proteins in plasma play in the body?

  Immune response
• The biconcave disk shape of erythrocytes increases surface area for gas exchange.
• Red blood cells lack a nucleus to allow for more hemoglobin.
• What part of a white blood cell directs its activity?

  Nucleus
• Neutrophils are white blood cells that phagocytose bacteria and fungi.
• Match the type of white blood cell with its function:

  Lymphocytes ↔️ Immune responses

  Monocytes ↔️ Phagocytosis and antigen presentation

  Eosinophils ↔️ Combat parasites and allergies

  Basophils ↔️ Release histamine in allergic reactions
• What is another name for platelets?

  Thrombocytes
• Platelets are small, anucleate cell fragments that play a crucial role in blood clotting.
• Platelets, also known as thrombocytes, are small, anucleate cell fragments that play a crucial role in blood clotting.
• Platelets lack a nucleus, which allows for more space for clotting factors.
• What do membrane receptors on platelets bind to at injury sites?

  Sites of injury
• Platelet granules contain clotting factors and chemicals that are released during clotting to promote coagulation.
• Platelets form a temporary plug at injury sites and release chemicals to promote further clotting.