Downloaded 35 times
Uploaded byNavodaya Vidyalaya Samiti
Excretion ppt
The human excretory system includes the kidneys, ureters, urinary bladder, and urethra. The kidneys filter waste from the blood to produce urine, which passes through the ureters into the bladder. The bladder stores urine until it is released through the urethra. Plants excrete excess water and oxygen through transpiration and stomata, and store many wastes in leaves, vacuoles, resins, or dead tissues.
More Related Content
More from Navodaya Vidyalaya Samiti
Excretion ppt
- 2. The biological processinvolved in the removal of the harmful nitrogenous materials is called Excretion Many unicellular organisms remove these waste by simple diffusion Multicellular organisms need specialized organs to perform this function
- 3. Excretion in humanbeings • The excretory system includes • 1. A pair of Kidneys • 2. A pair of Ureter • 3. Urinary bladder • 4. Urethra
- 4. Urinary System Renal artery Kidney Ureter UrinaryBladder Renal Vein For sphincters, see next slide
- 5. Structure of theExcretory system • Kidneys are located in the abdomen on either side of the back bone • Each kidney has many Nephrons • Urine which is produced in the kidneys passes through the ureters into the urinary bladder • It is stored in the bladder until it is released through the Urethra
- 6. Structure of theNephron • It has 3 parts • 1. Renal capsule • 2. Renal tubule • 3. Collecting duct
- 8. RENAL CAPSULE • Ithas • 1. Bowmans capsule • 2. Glomerulus • Bowmans capsule is the cup shaped end of the nephron that collects the filtered urine • Glomerulus is a cluster of very thin walled capalliries • Glomerulus is associated with the Bowmans capsule
- 9. Renal tubule • Ithas three parts • 1. Proximal convoluted tubule • 2. Henleys loop • 3. Distal convoluted tubule
- 10. Process of urineformation
- 12. Factors on whichamount of water reabsorption depends • 1. How much excess water there is in the body • 2. How much dissolved waste there is to be excreted
- 13. Excretion in plants •1. Plants excrete excess water by transpiration • 2. oxygen which is thought to be waste product generated during the photosynthesis comes out through the stomata • 3. Waste products may be stored in leaves that fall off • 4. Many plant waste products are stored in vacuoles they excrete some waste products into the soil around them • 5. Some waste products are stored as resins & gums in old xylem • 6. Most of the waste products are stored within the dead tissues which are removed periodically
- 15.