In this article we will discuss about:- 1. Meaning of Nephrons 2. Number of Nephrons 3. Structure 4. Types. Meaning of Nephrons: Nephrons are structural and functional units of the kidneys. Number of Nephrons: Each human kidney contains about one million (ten lakhs) nephrons. Structure of Nephron (= Uriniferous Tubule): It consists of Malpighian corpuscle and renal tubule. 1. The [...]
The following points highlight the three processes of formation of urine in human body. The processes are: 1. Glomerular Filtration 2. Tubular Reabsorption 3. Tubular Secretion. Process # 1. Glomerular Filtration (= ultrafiltration, Fig. 19.14): On an average 1100-1200 ml of blood is filtered by the kidneys per minute. The glomerular capillaries are narrower than the afferent renal arterioles. Therefore, [...]
In this article we will discuss about:- 1. Movements of Body Parts in Living Organism 2. Types of Movement in Living Organism. Movements of Body Parts in Living Organism: All the animals are able to move their body parts. (a) Movements of External Body Parts: These serve many purposes: (i) Movements of limbs, appendages, head and trunk help to maintain [...]