1- Complete the following statements :
1- The useless materials are called excretory wastes , while solid wastes are
the indigested food.
2- The excretory materials contain useless materials and poisonous materials.
3- We can get rid of the excretory materials as carbon dioxide and water
vapour through respiratory system.
4- The urinary system is located inside the abdominal cavity.
5- Two kidneys are the main organs in the urinary system.
6- Kidneys are located on both sides of the backbone.
7- The kidney excretes the wastes dissolved in water in the form of urine .
8- Ureter is connected with the kidney and carries the urine into urinary
bladder.
9- Urine consists of water containing some excess salts , excess water, urea
and uric acid.
10- The tube which extends from the urinary bladder and opens outside the
body is called urethra
11- Artery carries the blood containing waste materials to the two kidneys.
12- Sweat glands get rid of excess water and excess salts in form of sweat.
2- Choose the correct answer :
1-
2-
The cell wastes are know as ……… materials.
a. harmful
b. cellular
c. excretory
d. poisonous
Urea and uric acid are produced from breaking down of …….
b. fats
a. proteins
1
c. salts
3-
4-
5-
6-
7-
d. carbohydrates
Carbon dioxide and water vapour are released by the ……………..
a. heart
b. lungs
c. kidneys
d. stomach
Urea is expelled by the ……….
a. heart
b. stomach
c. lungs
d. kidneys
The blood carries wastes to special organs which ……….. them.
a. use
b. get rid of
c. break
d. burn
……… is the narrow tube that allows urine to reach the urinary bladder.
a. Urethra
b. Ureter
c. Kidney
d. Artery
………… is responsible for storing the urine temporarily.
a. Ureter
b. Kidney
c. Urinary bladder
d. Urethra
3- Put (√ ) in front of the correct statement and (x) in front of the incorrect
ones, then correct it :
1- The cell wastes are known as solid wastes. (Excretory wastes)
(x)
2- Nitrogenous wastes are produced from breaking down of
proteins.
(√ )
3- The urinary system is located inside the abdominal cavity.
(√ )
4- The two narrow tubes that connect between the kidneys and the
urinary bladder called urethra. (Ureters)
2
(x)
5- Blood enters the kidney through veins. (Artery)
(x)
6- Avoid urinating in irrigation canals to protect yourself from
schistosomiasis disease.
(√ )
4- Write the scientific term for each of the following:
1- Carbon dioxide, water vapour, nitrogenous wastes
and excess salts.
(Excretory materials)
2- The system that clarifies blood from excess salts,
urea and uric acid.
(Urinary system)
3- The two organs that clarify the body from cell
wastes and harmful substances.
(Kidneys)
4- The two organs which excrete carbon dioxide and
excess water in the form of water vapour.
(Lungs)
5- The fluid which produced by the kidneys and
contains harmful substances.
(Urine)
6- The narrow tube which connects with the kidney
and urine passes through it.
(Ureters)
7- A tube extends from the urinary bladder and opens
outside the body.
(Urethra)
5- Give reasons for :
1- The skin is one of the excretory organs.
Because it gets rid of excess water and excess salts in the form of sweat
2- If the two kidneys are damaged, the person will die.
Because they filter the blood from urea, uric acid, water and salts
3- Man urinates less in summer than in winter.
Because sweating increases during summer that decrease the amount of
urine released.
3
4-
Sweat has salty taste.
Because it contains some of excess salts
5- You must not keep urine for a long time.
Because keeping it affect the kidneys.
To keep the urinary system healthy
6- You must eat food low in salts.
To keep the urinary system healthy
6- Correct the underlined words in each of the following statements :
1-
The kidney filters some excess water and salts from the human food.
Sweat glands
2-
Ureter is a tube that extends from the bladder to open outside of the body.
Urethra
3-
The urinary bladder stores sweat temporarly.
Urine
7- State the function of each of the following :
1-
The kidney.
Filter the blood from (urea – uric acid – water – salts) in the form of
urine
2-
The ureter.
Transfers the urine from the kidneys to the urinary bladder.
3-
The urinary bladder.
Stores the urine temporary until it is released outside the body
through Urethra.
4