Blood Composition and Functions

What is the main function of blood in the human body?

Blood is classified as a type of connective tissue.

What are the two main components of blood?

Blood is continuously pumped by the _____ to transport through the body.

Match the components of blood with their descriptions:

What percentage of plasma is made up of water?

The flow of blood can be stopped without any immediate consequences.

What is the primary function of albumin in the blood?

What happens to blood when it travels to the lungs?

Erythrocytes are produced at a rate of four to five billion cells per minute.

What percentage of blood volume do leucocytes constitute?

The spleen is often referred to as the __________ of RBCs.

Match the type of blood cell with its function:

Which type of blood cell is responsible for controlling bleeding?

Erythrocytes contain a nucleus.

List the two main types of WBCs.

Blood: The Lifeline

Blood is a fluid connective tissue, a transport liquid pumped by the heart throughout the body.
Constant blood flow is vital; cessation can lead to death within minutes.
Blood's composition is crucial for maintaining bodily functions.

Blood Composition

Plasma: A yellowish liquid matrix (55% of blood volume).
- Primarily water (90%).
- Contains proteins (6%), including albumin for osmotic pressure regulation.
- Also dissolved minerals, glucose, hormones, and carbon dioxide.
Blood Cells: (45% of blood volume).
- Erythrocytes (RBCs):
  - Round, biconcave, and red, due to haemoglobin (iron-containing protein).
  - Transport oxygen.
  - Produced in bone marrow at 4-5 billion per hour.
  - Destroyed in the spleen (the graveyard of RBCs).
  - 120-day lifespan.
  - 4-6 million per cubic millimetre.
- Leucocytes (WBCs):
  - Colourless, nucleated cells (1% of blood volume).
  - Crucial for fighting disease and attacking foreign bodies.
  - Two main types: granulocytes (e.g., neutrophils, eosinophils) and agranulocytes (e.g., lymphocytes, monocytes).
- Thrombocytes (Platelets):
  - Cell fragments for blood clotting.

Blood Circulation and Function

Blood composition varies based on organ interactions.
- Oxygen exchange occurs in lungs.
- Nutrient absorption in intestines is transported.
- Waste removal to eliminating organs.
- Hormones carried to target organs.
Old RBC breakdown iron is recycled for new cell production.
Mechanisms ensure proper blood component concentration.

Explore the vital aspects of blood as a connective tissue. This quiz covers blood's composition, including plasma, red blood cells, and white blood cells, as well as their essential functions in the human body. Understanding these components is crucial for maintaining health and homeostasis.