Nephron: Introduction and Structure
The structural and functional unit of kidney is called nephron. There are millions of nephrons (1-1.3 million) in each kidney. The count of nephron decreases...
Simple permanent tissue (plants)
Introduction A permanent tissue is a group of cells that have lost the power of cell division and growth. These cells have attained their definite...
Differences between meristematic and permanent tissues
S.N Meristematic tissues Permanent tissues 1. Cells are continuously dividing and the process is rapid. Cells do not divide continuously. 2. Thin walled cells. Thin...
Differences Between Arteries and Veins
S.N Arteries Veins 1. Carry blood away from the heart. Bring blood towards the heart 2. Wall is thick and strong. Wall is thin and...