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biology class 7 > Holozoic nutrition in humans > Flashcards

Holozoic nutrition in humans Flashcards

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1
Q

What is the digestive system called in Humans?

A

Alimentary canal…

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2
Q

What are the two openings of humans?

A

Mouth, anus

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3
Q

name at least 4 glands in the digestive system.

A

liver, intestinal glands, salivary glands, pancreas

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4
Q

name all the organs of the digestive system in order.

A

mouth, oesophagus, stomach, small intestine, large intestine rectum, anus…

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5
Q

The mouth is also known by this name.

A

buccal cavity…

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6
Q

What are the three organs/glands which help in ingestion?

A

teeth, tongue, salivary glands…

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7
Q

how many types of teeth are there according to age

A

milk teeth and permanent teeth…

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8
Q

when do milk teeth start to appear?

A

7 months…

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9
Q

total number of milk teeth.

A

20

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10
Q

total number of permanent teeth.

A

20+8

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11
Q

What is the arrangement of teeth in the buccal cavity?

A

I=4/4
C=2/2
Pm=4/4
M=6/6

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12
Q

Function of incisors

A

To cut the food

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13
Q

function of molars

A

to gring and chew the food

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14
Q

what is the the function of the tongue?

A

-to mix the food with the saliva.
-to taste the food.
-pushing the food into the food pipe.

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15
Q

where is the tongue present?

A

it is attached to the floor of the buccal cavity…

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16
Q

What is present on the tongue?

A

taste buds…

17
Q

how many pairs of salivary glands are present?

A

3

18
Q

what does salivary glands produce

A

It produces saliva which is a digestive juice…

19
Q

What are the components of saliva?

A

Water+s.amylase
s=salivary.

20
Q

% of starch digestion occurs in the buccal cavity.

A

70%

21
Q

saliva make the food______.

A

moist

22
Q

What is the product of the undigested food in the buccal cavity?

A

bolos

23
Q

oesophagus is also known as__________.

A

foodpipe

24
Q

What is the material os oesophagus and its length?

A

muscular organ, a foot long.

25
Q

food pipe connects ________.

A

stomach.

26
Q

What is the movement in the food pipe? mention its definition.

A

peristalsis,
is the continually contraction & relaxation of the oesophagus muscles which push the bolos to the stomach.

27
Q

What is epiglottis.

A

It is the muscular flap which prevents the food going into the wind pipe…

28
Q

Basic definition of the stomach.

A

It is the a muscular bag lor sack like structure resembling like the letter ‘J’

29
Q

What is the tree layers of the stomach?

A

muscular , mucosa , gastric glands.

30
Q

What happens in the stomach while digestion?
(difficult) most difficult.

A

-muscular wall contracts & relaxes to mix the bolos with gastric juice. this is the churning of food.
-mucosa secrets a sticky substance = mucus which prevents the direct contact of gastric juice with the muscular wall.
-gastric gland constitutes the inner layer, secrets a digestive juice known as gastric juice. this contains hydrochloric acid and pepsin.

31
Q

use of hydrochloric acid in stomach?

A
  1. to kill the bacteria
    2.to make acidic nature for pepsin to act on food.
32
Q

What is pepsin?

A

Helps in breaking down complex protein into simpler amion acids

33
Q

Three parts of small intestine are _____,_________,_____

A

duodenum , Jejunum eleum

34
Q

duodenum helps in digestion of__________nutrients.

A

macro

35
Q

Explain what happen in the Ileum

A

place where digested food gets absorbed.

36
Q

What is villi?

A

finger like projections in the Ileum, which is covered in blood cappillaries

37
Q

large intestine helps in the formation of _________.
mention large intestine function?

A

stools
helps in the absorption of water vitamins and minerals

38
Q

length of the large intestine

A

1.5 meter

biology class 7 (7 decks)

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