Excretory System Class-7th Goyal Brothers ICSE Biology Solutions Chapter-5 Unit-1. We Provide Step by Step Answers of Objectives, Fill in the blanks, One word, Question Type answers of Chapter-5, Unit 1, Excretory System. Visit official Website CISCE for detail information about ICSE Board Class-7.
Excretory System Class-7th Goyal Brothers ICSE Biology Solutions Chapter-5 Unit-1
| Board | ICSE |
| Class | 7th |
| Subject | Biology |
| Book Name | Goyal Brothers |
| Chapter-5 | Excretory System |
| Unit-1 | Excretory System |
| Topic | Solution of exercise questions |
| Session | 2023-24 |
Excretory System Class-7th Goyal Brothers
ICSE Biology Solutions Chapter-5 Unit-1
Que: I. Multiple Choice Questions – Tick (√) mark the correct choice :
1. The process of removal of waste products from the body is called
(a) Transpiration
(b) Evaporation
(c) Excretion
(d) Respiration
Answer: option (c) Excretion is correct.
2. The structures, present in kidney, which act as filters are
(a) Alveoli
(b) Nephrons
(c) Villi
(d) None of the above
Answer: option (b) Nephrons is correct.
3. The urinary bladder opens into
(a) Urethra
(b) Nephron
(c) Ureter
(d) Neuron
Answer: option (a) Urethra is correct.
Que: II. Fill in the blanks :
1. Getting rid of waste materials in living beings is called excretion.
2. Skin helps in the excretion of water and salt.
3. In humans, carbon dioxide is excreted through lungs.
4. Kidneys are made up of a number of filters called nephrons.
5. Kidneys are connected to the urinary bladder by long tubs called ureter.
Que: III. Give one word for the following :
Question: 1. Coiled tubes acting as filters and present in kidney.
Answer: Nephrons
Question: 2. Organ for removed of wastes from the blood.
Answer: Kidney
Que: IV. Answer the following questions :
Question: 1. Name the various organs of excretion in humans.
Answer: The organs that form the excretory system in human beings include the kidney, ureter, urethra, and urinary bladder.
Question: 2. What waste products are removed by the following parts?
(a) Skin
Answer: Expels sweat that contains water, urea, and salts through the sweat glands.
(b) Kidney
Answer: The kidneys remove waste products called urea from the blood through tiny filtering units called nephrons.
(c) Lungs
Answer: The lungs are responsible for the removal of gaseous waste from the body.
(d) Large intestine
Answer: The large intestine (or colon, or large bowel) is the last structure to process food, taking the undigestible matter from the small intestine, absorbing water from it and leaving the waste product called feces.
Question: 3. Name the different excretory products produced by the body in humans.
Answer: The excretory products include amino acids, urea, uric acid, carbon dioxide, water, and ammonia.
Question: 4. Draw a labelled diagram of excretory system of humans.
Answer: 
Question: 5. Explain :
(i) Urinary Tract Infection
Answer: UTIs are common infections that happen when bacteria, often from the skin or rectum, enter the urethra, and infect the urinary tract. The infections can affect several parts of the urinary tract, but the most common type is a bladder infection (cystitis). Kidney infection (pyelonephritis) is another type of UTI.
(ii) Kidney Stone
Answer: Kidney stones (also called renal calculi, nephrolithiasis or urolithiasis) are hard deposits made of minerals and salts that form inside your kidneys. Diet, excess body weight, some medical conditions, and certain supplements and medications are among the many causes of kidney stones.
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