CG Board Class 6 Science Structure And Functions Of Living Organisms – II Notes / Textbook Exercises and More………
Digestive System:
Main organs: mouth, pharynx, esophagus, stomach, small intestine, large intestine, liver, and pancreas.
Functions: Ingestion, mixing food with saliva, digestion in the stomach, absorption of nutrients in the small intestine, and elimination of undigested food.
Circulatory System:
Components: Blood vessels (arteries and veins), heart, and capillaries.
Functions: Transportation of oxygen-rich blood from the heart to the body via arteries and returning deoxygenated blood to the heart through veins.
Respiratory System:
Function: Exchange of oxygen and carbon dioxide between the lungs and blood.
Excretory System:
Processes: Removal of waste products through the rectum, lungs (carbon dioxide), skin (sweat), and urine.
Components: Kidneys, ureters, urinary bladder, and urinary tube.
Skeleton and Joints:
Skeleton: Provides structural support for the body.
Bones: Hard structures that make up the skeleton.
Nervous System:
Main parts: Brain, spinal cord, nerves, and sensory organs.
Functions: Coordination of various organ systems, control of activities, reflex actions mediated by the spinal cord.
Sense Organs:
Include eyes (vision), ears (hearing), nose (smell), tongue (taste), and skin (touch).
Reproductive System:
Male: Testes are the reproductive organs.
Female: Ovaries are the reproductive organs.
Responsible for the production of offspring through sexual reproduction.
Fill in the blank spaces —
1. We have ___________ types of teeth.[four]
2. The liquid waste that is excreted out is called ___________.[urine]
3. The eyes are a type of ___________ organ.[sense]
4. The _____________ is the main organ of the circulatory system.[heart]
5. _______________ is an example of an animal that gives birth to young ones.[Humans]
Match the following: [Solved]
| Column A | Column B |
| Saliva | Digestion |
| Lungs | Respiration |
| Blood | Circulation |
| Kidney | Excretion |
| Testes | Reproduction |
| Brain | Sense Organ |
| Skin | Voluntary Action |
Write answers for the following questions –
a. Which are the organs of the respiratory system?
The organs of the respiratory system include the lungs, trachea (windpipe), bronchi, bronchioles, and the diaphragm. These organs work together to facilitate the process of breathing, allowing oxygen to enter the body and carbon dioxide to be expelled.
What does the diaphragm do during breathing?
The diaphragm is a muscle involved in the process of breathing. When you inhale, the diaphragm contracts and moves downward.during exhalation, the diaphragm relaxes and moves upward.
