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Respiration in Organisms Class 7 Science (Biology) in One Shot | BYJU'S - Class 7

BYJU'S - Class 6, 7 & 8・34 minutes read

The speaker discusses cellular respiration, the human respiratory system, gas exchange in the lungs, and various breathing mechanisms in different organisms, highlighting key processes and structures involved for efficient gas exchange. Students are urged to take notes and ask questions to deepen their understanding, emphasizing the importance of interaction and participation in learning about respiration and organisms.

Insights

  • Cellular respiration involves breaking down food in cells to release energy, occurring in all living organism cells through aerobic and anaerobic processes.
  • The speaker provides a detailed explanation of the human respiratory system, highlighting the crucial role of alveoli in gas exchange, comparing their structure to a raspberry and emphasizing the intricate exchange of gases in the lungs.

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Recent questions

  • What is cellular respiration?

    The breakdown of food in cells to release energy.

  • How does gas exchange occur in the lungs?

    Through the alveoli and blood vessels.

  • How do different organisms respire?

    Through various respiratory structures and mechanisms.

  • How do plants respire?

    Through stomata on leaves and roots.

  • What is the human respiratory system pathway?

    From nostrils to alveoli for gas exchange.

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Summary

00:00

"Cellular Respiration and Human Respiratory System"

  • The speaker joined Akasha in 9th standard, which was early, and gave Anthony an 8th standard, marking a significant moment in their life, leading to competing across India.
  • The speaker welcomes students to Channel 6 7th and 8th, introducing themselves as Ankita, engaging with students like Kushi, Sarvesh, Rakesh, Ridhi, Muhammad, Rajeshwar, Aju, Sarvesh, Nee, Era, Suraj, Ashok, Basanta, Lucky, Kanti, Ravi, Saravi, Survey, Jyoti, Nero, Art, and Craft.
  • The speaker emphasizes the importance of energy in the class, encouraging interaction and participation, and announces the completion of the chapter on respiration and organisms in one session.
  • Students are urged to register for an important examination for self-analysis, with a chance to win a 100% scholarship, with registration details provided in the description below the video.
  • The speaker delves into the concept of cellular respiration, defining it as the breakdown of food in cells to release energy, highlighting the importance of glucose as the primary energy source.
  • Cellular respiration occurs in all living organism cells, with two types: aerobic respiration, which involves oxygen and produces carbon dioxide, water, and energy, and anaerobic respiration, which occurs without oxygen, producing alcohol, carbon dioxide, and energy.
  • The speaker elaborates on the human respiratory system, detailing the pathway of air from the nostrils to the pharynx, trachea, bronchus, bronchioles, and alveoli, emphasizing the role of alveoli in gas exchange with blood vessels.
  • The process of exhaling carbon dioxide involves the blood carrying carbon dioxide to the alveoli for exchange with oxygen, highlighting the intricate exchange of gases in the lungs.
  • The speaker compares the structure of alveoli to a raspberry, emphasizing the thin capillaries surrounding them for efficient gas exchange.
  • Students are encouraged to note down the details of the gas exchange process in the lungs, with the speaker prompting interaction and addressing doubts from the students.

18:45

Gas Exchange in Respiratory Systems of Various Animals

  • Exchange of gases occurs in the alveoli in the respiratory system.
  • The nasal passage leads to the pharynx, a common passage for air movement.
  • Arteries are large blood vessels carrying oxygen-rich blood, while capillaries are thin structures reaching tissues and cells.
  • The difference between the pharynx and the nasal passage lies in their paths.
  • Respiration and breathing are distinct processes, with breathing involving inhaling oxygen and exhaling carbon dioxide.
  • Inhaling involves the rib cage moving up and the diaphragm moving down to expand the chest cavity.
  • Exhaling sees the ribs moving down, the diaphragm moving up, and air rushing out of the lungs.
  • Cockroaches respire through spiracles, trachea, and tubes for gas exchange.
  • Earthworms breathe through their moist skin, with air dissolving into it and carbon dioxide diffusing out.
  • Fishes breathe through gills, extracting oxygen dissolved in water, while frogs, as amphibians, have lungs for respiration on land and in water.

39:22

"Unique Breathing Methods in Frogs, Fish, Plants"

  • Frogs breathe through their skin and lungs, with their moist skin aiding in underwater gas exchange and lungs helping on land.
  • Fish communicate through various methods like noise, bubbles, and color changes, forming their own language.
  • Plants respire by taking in oxygen through stomata on leaves and releasing carbon dioxide, with guard cells regulating the opening and closing of stomata.
  • Roots and stomata in plants facilitate gas exchange, with stomata aiding in photosynthesis and respiration.
  • Plants primarily perform photosynthesis during the day, taking in carbon dioxide and releasing oxygen, while respiration occurs at night, leading to higher carbon dioxide levels around plants, making it advisable not to stay under a big tree at night due to increased carbon dioxide levels.
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