Excretory System

What does the blood carry away from body cells? Oxygen & waste Carbon dioxide & waste Carbon dioxide & nutrients Oxygen & nutrients 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Functions of Excretory System Rids blood of wastes (urea)

Functions of Excretory System Rids blood of wastes (urea) Controls blood volume by removing extra water produced by cells

Functions of Excretory System Rids blood of wastes (urea) Controls blood volume by removing extra water produced by cells Balances salts and water so cells can function properly

Organs of the Excretory System Renal Artery = carries blood into the kidney Renal Vein = carries blood out of the kidney

Organs of the Excretory System Kidneys = filter blood that has collected wastes from cells

Organs of the Excretory System Kidneys = filter blood that has collected wastes from cells Nephrons = filters inside the kidneys Produce urine (sterile waste fluid, 96% water)

Which is not a function of the excretory system? Removes wastes from the blood Removes excess water from the blood Removes carbon dioxide from the blood Removes excess salt from the blood 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What is this structure? Kidney Renal artery Renal vein Nephron 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What does the renal vein carry? Blood containing waste into the kidneys Blood containing waste back to the body Clean blood into the kidneys Clean blood back to the body 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What is urine mostly made of? Water Urea Salt Blood 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Organs of the Excretory System Ureters = tubes that lead from each kidney to bladder

Organs of the Excretory System Urinary bladder = muscular organ that holds urine

Organs of the Excretory System Urethra = tube that carries urine from the bladder out of the body

What are the tubes that connect the kidneys to the bladder called? Nephrons Arteries Urethras Ureters 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What is this structure? Ureter Urine Bladder Urethra 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Where is urine stored until the body is ready to eliminate it? Kidneys Ureters Bladder Urethra 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Other Excretory Organs Skin = releases perspiration (water & salts) to cool off body

Other Excretory Organs Lungs = release carbon dioxide from the body

Which statement is true about excreted substances? Water can only be removed by the kidneys. Excess salt can be removed by the kidneys & skin. Blood carries all waste products to the lungs to be removed from the body. Carbon dioxide can be excreted by the skin. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Which system does not include an excretory organ? Excretory system Integumentary system Cardiovascular system Respiratory system 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30