Blood is differ from real connective tissue `:-`

Options

A. Plasma of blood is not entirely secreted by blood cells
B. Blood corpusles are not formed in blood
C. Fibres are absent in blood
D. All of above

Answer

**Step-by-Step Solution:**

1. **Understanding Blood as a Connective Tissue**: Blood is classified as a connective tissue because it connects different parts of the body by transporting nutrients, gases, hormones, and waste products. However, it differs from traditional connective tissues in several ways.

2. **Composition of Blood**: Blood consists of cells suspended in a liquid matrix called plasma. The main components of blood include red blood cells (RBCs), white blood cells (WBCs), and platelets, all of which are suspended in plasma.

3. **Plasma Composition**: Blood plasma is primarily made up of water (about 92%) and contains proteins (about 8%) that are produced in the liver. It does not contain fibers like collagen or elastin, which are characteristic of other connective tissues.

4. **Formation of Blood Cells**: Blood cells (RBCs, WBCs, and platelets) are not formed within the blood itself; instead, they are produced in the bone marrow through a process known as hematopoiesis.

5. **Absence of Fibers**: Unlike other connective tissues, blood does not have fibers. This is a significant difference, as fibers are a defining characteristic of traditional connective tissues.

6. **Evaluating the Options**:
- **Option 1**: "The plasma of blood is not entirely secreted by blood cells" - This is correct.
- **Option 2**: "The blood carcasses are not formed in the blood" - This is also correct, as blood cells are formed in the bone marrow.
- **Option 3**: "The fibers are absent in blood" - This is correct as well.
- **Option 4**: "All of the above" - Since all previous statements are correct, this option is also correct.

7. **Conclusion**: Therefore, blood differs from real connective tissue in that it does not have fibers, its plasma is not entirely secreted by blood cells, and blood cells are formed in the bone marrow, not in the blood itself. The correct answer is "All of the above."

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