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Biology: Human Body System Video Lecture | General Knowledge - SSC CHSL

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FAQs on Biology: Human Body System Video Lecture - General Knowledge - SSC CHSL

1. What are the main organs of the human digestive system and their functions?
Ans. The main organs of the human digestive system include the mouth, esophagus, stomach, small intestine, and large intestine. The mouth is responsible for chewing and breaking down food, while the esophagus transports the food to the stomach. The stomach further breaks down the food with the help of digestive enzymes and acids. The small intestine absorbs nutrients from the broken-down food, and the large intestine absorbs water and eliminates waste.
2. How does the respiratory system work in the human body?
Ans. The respiratory system in the human body facilitates the exchange of oxygen and carbon dioxide. When we inhale, air enters the nasal cavity or mouth, passes through the pharynx, larynx, trachea, and into the lungs. In the lungs, the bronchial tubes branch out into smaller tubes called bronchioles, which end in tiny air sacs called alveoli. Oxygen from the inhaled air diffuses into the blood vessels surrounding the alveoli, while carbon dioxide from the blood is released into the alveoli to be exhaled.
3. What is the role of the circulatory system in the human body?
Ans. The circulatory system, also known as the cardiovascular system, is responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body. It consists of the heart, blood vessels, and blood. The heart pumps oxygenated blood from the lungs to the rest of the body through arteries. The deoxygenated blood returns to the heart through veins, where it is then sent to the lungs for oxygenation. This continuous cycle ensures the delivery of essential substances and the removal of waste products.
4. How does the nervous system control and coordinate the body's functions?
Ans. The nervous system plays a crucial role in controlling and coordinating the body's functions. It consists of the central nervous system (brain and spinal cord) and the peripheral nervous system (nerves throughout the body). The nervous system communicates through electrical signals transmitted by neurons. Sensory neurons detect stimuli from the environment and transmit signals to the central nervous system. The brain processes this information and sends appropriate signals through motor neurons to initiate a response. This coordination allows us to move, think, and respond to our surroundings.
5. What is the purpose of the skeletal system in the human body?
Ans. The skeletal system provides support, protection, and movement for the human body. It is composed of bones, cartilage, ligaments, and tendons. The bones form the framework that supports the body and protect vital organs. They also serve as attachment points for muscles, allowing movement and locomotion. Additionally, the skeletal system is involved in the production of blood cells in the bone marrow and acts as a mineral reservoir, storing calcium and phosphorus for the body's metabolic needs.
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