BIOLOGY CLASS 9TH JUNE 2021

-

 Pharynx - :

Pharynx is about 12 cm long funnel shape vertical canal were serve as a passage ways to food from bacal cavity to oesophagus  and air from nose to trachea 

It is a common pathway for food and air


Oesophagus - :

The oesophagus is a long and tubular structure which serve to carry the food from pharynx to the stomach. The wall of oesophagus is highly mascular. It is not concerned with digestion. It exhibit peristaltic movement and the food is food push forward in digestive track. This movement occurs through all the alimentary canal.


Stomach - :

Stomach is mascular sac present on the left side of abdomen. Partially digested food reaches into the stomach now further digestion of food takes place.

The stomach serves four main functions

STORAGE OF FOOD 

The food is stored in stomach variable duration.

1. Carbohydrate continue to get digested till the salivary enzyme (ptyalin) destroyed by hydrochloric acid in the stomach.

2.The carbohydrate remains in stomach forgot about carbohydrates about 1 to 2 hr protein upto 3 hr fat 3 to 6 hr.

3.THE stored food in the stomach enables us to take  food at interval.


MECHANICAL CHURNING OF FOOD

Wall of stomach under goes periodic mascular contraction the food get churned mixes thoroughly with gastric juices.


PARTIAL DIGESTION 

Stomach posses branch and tubular glands present on the inner surface of its walls. There are 3 types of glands which secrete hydrochloric acid, protein digestive enzyme and Mucus. 

All these secretions are collectively called gastric juice. 


THANK YOU so much 

Dewanshu rai 

Comments

Post a Comment

Thank you so much dear visitor
I am working hard to improve our efficiency and to gather more comfortability for you

Popular posts from this blog

Golden Globes to launch a pandemic-era Hollywood awards season

-
Image
  Los Angeles : Hollywood’s award season kicks off on Sunday at a very different Golden Globes, with a mainly virtual ceremony set to boost or dash the Oscars hopes of early frontrunners like   Nomadland   and   The Trial of the Chicago 7 . Usually a star-packed, laid-back party that draws Tinseltown’s biggest names to a Beverly Hills hotel ballroom, this pandemic edition will be broadcast from two scaled-down venues, with essential workers among the few in attendance. Deprived of its usual glamour, the Globes remain a coveted prize, and a high-profile source of momentum in the run-up to the season-crowning Oscars, which were pushed back this year to April. Nomadland , Chloe Zhao’s paean to a marginalised, older generation of Americans roaming the West in rundown vans, has long been viewed as a frontrunner for the Globes’s top prize. But it will face stiff competition from Aaron Sorkin’s  Chicago 7 , a courtroom drama about the city’s anti-war riots in 1968 with...
Read more

Modi urges use of Indian goods

-
Image
  NEW DELHI : Invoking his government’s Atmanirbhar Bharat initiative, Prime Minister Narendra Modi on Sunday said self-reliance is not just a government policy but a national spirit. “When every countryman takes pride, every countryman connects; self-reliant India doesn’t remain just an economic campaign but becomes a national spirit,” said Modi as he mentioned a series of Made in India achievements — from fighter plane Tejas to vaccines — in his monthly radio address Mann ki Baat. Making a pitch for rainwater harvesting, Modi announced the “Catch The Rain” campaign as part of which he urged the citizens to conserve rainwater for 100 days during monsoons. With most areas of the country expected to start receiving rain in May-June, the PM asked the people to start preparations for rainwater harvesting. “We shall have to understand our collective responsibilities with regard to water. Can we right away start a 100-day campaign for the sake of cleaning up water sources around us and ...
Read more

Bumrah released from team over ‘personal reasons’, to miss 4th Test

-
Image
  Ahmedabad : India will be without pace spearhead Jasprit Bumrah in the final Test against England after the 27-year-old was released from the squad for personal reasons, the BCCI said on Saturday. The right-arm seamer took four wickets in the opening Test in Chennai but was rested for the second match, which India won to level the series. Bumrah returned to play his first test at his home ground in Ahmedabad, where India triumphed inside two days to go 2-1 up in the four-match series. “Jasprit Bumrah made a request to BCCI to be released from India’s squad ahead of the fourth Test owing to personal reasons,” the board said. “Accordingly, the fast bowler has been released and he will not be available for selection for the fourth test,” it added. India have decided not to add any player to cover for his absence for the final Test, also in Ahmedabad from Thursday. Bumrah had a limited role in the third Test, where spinners Axar Patel and Ravichandran Ashwin wreaked havoc. The bowle...
Read more