Function of diaphragm class 10

Question 1 Name the flap which closes the glottis to check the entry of food into it during swallowing? Question 2 What happens to the diaphragm when diaphragm muscles contract? Question 3 Name the cavity in which the lungs of man are enclosed. What is its function? Question 4 State the function of epiglottis? Question 5 Explain the path of transfer of oxygen from trachea to tissue cell? Question 6 Respiration is a vital function of body. Why? Question 10 What is diaphragm? Respiration in Animals Terrestrial animals can breathe the oxygen in the atmosphere. Animals that live in water need to use the oxygen dissolved in water. Rate of breathing in aquatic organism is much faster than seen in terrestrial animals because amount of dissolved oxygen is low in water than in the air. Respiratory System in Humans (1) Nose: There is a pair of external nostrils at the lower end of nose. The air enters through the nostrils. The air passing through nostrils is filtered by fine hairs that lines the passage. The passage is lined with mucus which help in this process. (2) Throat or Pharynx: The nasal passage open behind into pharynx. It is a common passage for food and air. It leads into an air tube called trachea through a slit called glottis. The glottis always remain open except during swallowing. The glottis bear a flap called epiglottis. During swallowing epiglottis closes the glottis to avoid entry of food into air pipe. (i) When we breathe in, chest cavity become large due to lift...

Alimentary canal or the digestive system includes the entire mechanism that starts with ingestion of food to its movement till the stomach. It concludes with digestion of food particles. The digestive system includes mouth, food pipe, stomach, small intestine, large intestine etc. Let us move on to the discussion about what is a food pipe or oesophagus. What is Oesophagus? The oesophagus or food pipe is an organ in the human digestive system that transfers food particles to the stomach for its ingestion. It is located ahead of the spinal column and right at the back of the trachea and heart. The length of the food pipe is about 25 cm with a width varying between 1.5 to 2 cm. Parts of Food Pipe When you are planning to prepare a short note on oesophagus, do not forget to focus on its different layers. Read on to know more about it. (Image will be Uploaded Soon) There are four layers in oesophagus – 1. Mucosa The mucosa is the innermost layer containing multiple mucous glands. It is entirely made up of stratified squamous epithelium. 2. Submucosa The submucosa is the upper sheath of the mucosa and connects the latter with muscularis. It is mostly a thick fibrous layer. The submucosa is responsible for secretion. 3. Muscularis The longitudinal muscular fold arising out of mucosa and submucosa is known as muscularis. It pushes down food towards the stomach through muscle movement. 4. Tunica Adventitia Tunica adventitia is the outer layer of oesophagus that attaches food pipe w...

• Extra Questions • CBSE Notes • RD Sharma Solutions • RD Sharma Class 12 Solutions • RD Sharma Class 11 Solutions • RD Sharma Class 10 Solutions • RD Sharma Class 9 Solutions • RD Sharma Class 8 Solutions • RS Aggarwal Solutions • RS Aggarwal Solutions Class 10 • RS Aggarwal Solutions Class 9 • RS Aggarwal Solutions Class 8 • RS Aggarwal Solutions Class 7 • RS Aggarwal Solutions Class 6 • ML Aggarwal Solutions • ML Aggarwal Class 10 Solutions • ML Aggarwal Class 9 Solutions • ML Aggarwal Class 8 Solutions • ML Aggarwal Class 7 Solutions • ML Aggarwal Class 6 Solutions • English Grammar • Words with Letters • English Summaries • Unseen Passages Class 10 Science Chapter 6 Extra Questions and Answers Life Processes Extra Questions for Class 10 Science Chapter 6 Life Processes with Answers Solutions Extra Questions for Class 10 Science Chapter 6 Very Short Answer Type Question 1. What will happen to a plant if its xylem is removed? [CBSE 2009] Answer: Xylem helps in the transport of water and minerals to the various parts of the plant. If xylem is removed it would ultimately lead to the death of the plant. Question 2. Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is the green colour due to? [CBSE 2010] Answer: The green dots like structures seen are the chloroplasts. The green colour is due to the pigment called chlorophyll. Question 3. Give one reason why multicellular organisms require special org...

Respiratory system structure and function Passage of air into the lungs • Air enters the body and is warmed as it travels through the mouth and nose. • It then enters the trachea. • The trachea divides into two bronchi. One bronchus enters each lung. • Each bronchus branches out into smaller tubes called bronchioles. Air travels through these bronchioles. • At the end of the bronchioles, the air enters one of the many millions of alveoli where gaseous exchange takes place. Breathing Breathing is the term given to the process of taking air into and out of the lungs. The process of inhalation and exhalation Two important structures for breathing are the diaphragm and intercostal muscles . The diaphragm is a sheet of muscle that separates the chest (or thoracic) cavity from the rest of the body. The intercostal muscles are found between the ribs and they control rib movement. Inspiration (breathing in) The diaphragm contracts and moves downwards. The intercostal muscles contract and move the ribs upwards and outwards. This increases the size of the chest and decreases the air pressure inside it which sucks air into the lungs. Expiration (breathing out) The diaphragm relaxes and moves back to its domed shape. The intercostal muscles relax so the ribs move inwards and downwards under their own weight. This decreases the size of the chest and increases the air pressure in the chest so air is forced out of the lungs. Composition of the air we breathe Breathed in Breathed out 21% ...

The respiratory system allows air to reach the lungs, from which oxygen enters the blood and circulates to all body cells. This system also removes waste gases from the body and helps prevent disease due to particulate matter. The respiratory system The respiratory system is made up of the nose, sinuses, lungs, This article examines the various parts of the respiratory system, some respiratory conditions, and how a person breathes. It also looks at lung function and the processes of inhalation and exhalation. The respiratory system is divided into an upper and lower respiratory tract. The upper tract • the nose and nasal cavity • the sinuses • the pharynx • the larynx The lower respiratory tract includes: • the lungs • the trachea • the diaphragm The sections below will look at each part of the respiratory system in more detail. Nose and nasal cavity Forming the main external opening of the respiratory system, the nose The nasal cavity is the uppermost part of the respiratory system, divided into two by the nasal septum. It is the best entrance for outside air, as hairs and mucus line the inside wall and operate as air cleansers. Within this hollow space, the air is warmed, moisturized, and filtered before reaching the lungs. The nose prevents dust, mold, and other contaminants from reaching the lungs. Sinuses The paranasal (meaning around the nose) sinuses are four paired, hollow spaces above and below the eyes. Connected to the nose by small openings, they Sinuses develo...

The diaphragm in the respiratory system is the dome shaped sheet of muscle that separates the chest from the abdomen. It is also referred to as the thoracic diaphragm because it is located in the thoracic cavity, or chest. It is attached to the spine, ribs and sternum and is the main muscle of respiration.