Samacheer Kalvi 6th Science Term 2 Solutions Chapter 6 Pdf
Tamilnadu Board Samacheer Kalvi 6th Science Term 2 Solutions Chapter 6: Tamilnadu State Board Solution Class 6 Science Term 2 Chapter 6 – Human Organ systems.
Samacheer Kalvi 6th Science Term 2 Solutions Chapter 6: Overview
Board |
Samacheer Kalvi |
Class |
6 |
Subject |
Science |
Chapter |
6 |
Chapter Name |
Human Organ systems |
Samacheer Kalvi 6th Science Term 2 Solutions Chapter 6 Pdf
I.) Choose the correct answer .
1.) Circulatory system transports these Throughout the body
a.) Oxygen
b.) Nutrient
c.) Hormones
d.) All of these
Answer:All of these
Solution:Nutrients, hormones, waste materials and respiratory gases are transported within the body through the help of circulatory system.
2.) Main organ of respiration in human Body is
a.) Stomach
b.) Spleen
c.) Heart
d.) Lungs
Answer:Lungs
Solution:Lungs are known as the main Organ of Respiration that are located within the chest cavity.
3.) Breakdown of food into smaller Molecules in our body is known as
a.) Muscle contraction
b.) Respiration
c.) Digestion
d.) Excretion
Answer: Digestion
Solution: Food is digested and absorbed by the digestive system. It converts complex food substances into simple forms.
II.) Fill in the blanks
1.) A group of organs together make up An __organ___ system
2.) The part of the skeleton that protects The brain is _____skull_______
3.) The process by which the body removes Waste is ____Excretion________
4.) The ____skin______ is the largest Sense organ in our body
5.) The endocrine glands produce chemical Substances called ___hormones______
III.) True or False. If False, give the Correct statement
1.) Blood is produced in the bone marrow.
Answer: Red blood corpuscles
2.) All the waste products of the body Are excreted through the circulatory System.
Answer: All the waste products of the body Are excreted through the excretory System.
3.) The other name of food pipe is Alimentary canal.
Answer: The other name of food pipe is oesophagus.
4.) Thin tube like structures which are the Component of circulatory system are Called blood vessels.
Answer: Thin tube like structures which are the Component of circulatory system are Called blood capillaries.
5.) The brain, the spinal cord and nerves Form the nervous system.
Answer: True
IV.) Mach the following
- Ear –Cardiac muscle
- Skeletal System- Flat muscle
- Diaphragm –Sound
- Heart –Air sacs
- Lungs – Protection of internal Organs
Answer:
Ear | Sound |
Skeletal system | Protection of internal organs |
Diaphragm | Flat muscle |
Heart | Cardiac muscle |
Lungs | Air sacs |
V.) Arrange in Correct sequence
- Stomach >Large intestine >Oesophagus >Pharynx > Mouth >Small Intestine>Rectum >Anus
Answer: Mouth> pharynx> oesophagus>stomach> small intestine> large intestine >rectum> anus
- Urethra >Ureter > Urinary Bladder > Kidney
Answer: Kidney> ureter>urinary bladder> urethra
VI.) Analogy
1.) Arteries : Carry blood from the heart:: _________ :carry blood to the heart.
Answer: veins
2.) Lungs: Respiratory system:: ___________: Circulatory system.
Answer: Heart
3) Enzymes: Digestive glands:: _____________: Endocrine glands
Answer: Hormones
VII.) Give very short answer
1.) Describe about skeletal system.
Answer:Bones, cartilages and joints together make up the skeletal system. A framework is provided to the body by bones. Bones and muscles together help in movements like running, walking etc.
2.) Write the functions of epiglottis.
Answer:The presence of a flap-like structure called epiglottis prevent the food we eat from entering into the wind pipe.
3.) What are the three types of blood Vessels?
Answer:Arteries, veins and capillaries are the three types of blood vessels.
4.) Define the term “Trachea”.
Answer:Trachea, also commonly known as the windpipe. Being supported by thecartilaginous rings , it is a tube that connects the larynx and pharynx to the lungs. This allows the passage of air. Trachea gets divided into right and left bronchi and then it enters the lungs.
5.) Write any two functions of digestive System.
Answer:Functions of digestive system are:
- It converts complex food substances into simple forms
- Food is digested and absorbed by this system.
6.) Name the important parts of the eye.
Answer:Iris, cornea, pupil and lens are important parts of the eye.
7.) Name the five important sense organs.
Answer:Eyes, ears, tongue, nose and skin are five important sense organs.
VIII.) Give short answer
1.) Write a short note on rib cage.
Answer:Rib cage consists of 12 pairs of flat and curved rib bones. Delicate organs like heart and the lungs are well protected by this
2.) List out the functions of the human Skeleton.
Answer:The major functions of the human Skeleton are:
- A framework is provided to the body by bones.
- Bones and muscles together help in movements like running, walking etc.
- It gives a shape to the body
- Internal organs are well protected by the outer Skeleton.
3.) Differentiate between the voluntary Muscles and involuntary muscles.
Answer:Voluntary muscles refers to skeletal muscles that are attached to the bones. They are called Voluntary because they can be controlled according to our will. Example –muscles of arm.
Involuntary muscles are smooth muscles in our body that are found in the walls of the digestive tract, urinary bladder, arteries and other internal organs. These muscles cannot be moved as per our will.
IX.) Answer in detail
1.) List out the functions of Endocrine System and Nervous system.
Answer:Endocrine system:
Various functions of the body is regulated by the endocrine system. It helps in maintaining the internal environment of the body. Chemical substances called hormones are produced in the body by various endocrine glands.
Nervous system:
- Sensory input- signals from the sensory receptors are conducted by the nervous system.
- Integration- sensory signals are interpreted and accordingly responses are formulated.
- Motor output- conduction of signals to effectors from the brain and the spinal cord. Such as muscle and gland cells.
2.) Label the diagram given below to show The four main parts of the urinary System and answer the following Questions.
Answer:
A.) Which organ removes extra salts And water from the blood?
Answer:The kidney removes extra salts and water from the blood.
B.) Where is the urine stored?
Answer:Urine is stored in the urinary bladder.
C.) What is the tube through which Urine is excreted out of the body?
Answer:It is Through the urethra that our urine is excreted out of the body.
What are the tubes that transfer Urine from the kidneys to the Urinary bladder called?
Answer:The tubes that transfer Urine from the kidneys to the urinary bladder is called ureter
X.) Questions based on Higher Order Thinking Skills
1.) What will happen if the diaphragm Shows no movement?
Answer:Diaphragm is the primary Organ of breathing. If it shows no movement then our lungs will not expand and contract, and ultimately stopping the breathing process. As a result the person will die.
2.) Why is the heart divided into two Halves by a thick muscular wall?
Answer:One of the two halves, circulate the oxygenated blood while the other deals with deoxygenated blood. Because both are separately circulated the heart is divided into two halves by a thick muscular wall.
3.) Why do we sweat more in summer?
Answer:Sweating helps in regulating the body temperature by acting as a cooling mechanism. The moisture after Sweating evaporates, thereby cooling down the body’s temperature.
4.) Why do we hiccup and cough Sometimes when we swallow food?
Answer:The presence of a flap-like structure called epiglottis prevent the food we eat from entering into the wind pipe. It helps in closing the windpipe when we eat. But this flap gets lesser time to close the windpipe, when we eat in a hurry. So as a result some of the food particles enter into the windpipe that lead to hiccups and cough.