Which of the following can be related to the tissue called blood ?

Options

A. It has a fibre-free matrix but in collagen protein
B. It has both nucleated and non-nucleated cells, performing aerobic respiration
C. Blood is a specialised connective tissue
D. It is a form of dense connective tissue, having dense arrangement due to large count of RBCs

Answer

To determine which statements relate to the tissue called blood, let's analyze each option step by step.

### Step 1: Understanding Blood as a Tissue
Blood is classified as a connective tissue. Connective tissues serve to support, bind, or separate other tissues and organs in the body. Blood specifically functions as the main circulating fluid, transporting nutrients, gases, hormones, and waste products throughout the body.

**Hint:** Remember that blood is a type of connective tissue that plays a crucial role in transport within the body.

### Step 2: Analyzing the First Statement
The first statement claims that blood's matrix is fiber-free but contains collagen protein. This statement is incorrect. Blood's matrix, known as plasma, is not fiber-free. It contains fibrinogen, which can form fibrin fibers during blood clotting. Collagen is not a significant component of blood plasma.

**Hint:** Focus on the components of blood plasma and the role of fibrinogen in clotting.

### Step 3: Analyzing the Second Statement
The second statement mentions that nucleated and non-nucleated cells in blood perform aerobic respiration. This is also incorrect. Red blood cells (RBCs) are non-nucleated and do not perform aerobic respiration because they lack mitochondria. They primarily rely on anaerobic respiration to generate energy while transporting oxygen.

**Hint:** Consider the characteristics of red blood cells and their energy production methods.

### Step 4: Analyzing the Third Statement
The third statement asserts that blood is a specialized connective tissue. This statement is correct. Blood, along with bone and cartilage, is classified as a specialized connective tissue due to its unique functions and composition.

**Hint:** Recall the classification of connective tissues and the specific types of specialized connective tissues.

### Step 5: Analyzing the Fourth Statement
The fourth statement claims that blood is a dense connective tissue. This is incorrect. Blood is classified as a fluid connective tissue, which allows it to circulate easily throughout the body. Dense connective tissues include tendons and ligaments, which have a more compact structure.

**Hint:** Differentiate between fluid connective tissue and dense connective tissue based on their properties and functions.

### Conclusion
After analyzing all the statements, the only correct statement related to blood is that it is a specialized connective tissue.

**Final Answer:** Blood is a specialized connective tissue (Option C).