Digestive System

Question 1

human digestive system consists of the _______________ and _____________

Answer 1

alimentary canal
associated glands

Question 2

alimentary canal begins with anterior opening _______ and opens out to the posterior opening __________

Answer 2

mouth
anus

Question 3

mouth leads to which cavity

Answer 3

oral or buccal

Question 4

oral cavity has

Answer 4

a number of teeth and a muscular tongue

Question 5

each tooth is embedded in a socket of jaw bone, this type of attachment is called

Answer 5

thecodont

Question 6

two sets of teeth in lifetime, this type of dentition is called

Answer 6

diphyodont

Question 7

having different types of teeth, this type of dentition is called

Answer 7

heterodont

Question 8

number of teeth in adult human

Answer 8

32

Question 9

types of teeth in adult human

Answer 9

incisors
canine
premolars
molars

Question 10

dental formula of human

Answer 10

2123/2123

Question 11

the hard chewing surface of the teeth, made up of _______, helps in the mastication of food

Answer 11

enamel

Question 12

tongue is a freely movable muscular organ attached to the floor of the oral cavity by the

Answer 12

frenulum

Question 13

upper surface of the tongue has small projections called __________, some of which bear taste buds

Answer 13

papillae

Question 14

oral cavity leads into a short ________ which serves as a common passage for food and air

Answer 14

pharynx

Question 15

the _________ and the __________ open up into the pharynx

Answer 15

oesophagus
trachea (wind pipe)

Question 16

a cartilaginous flap called _______ prevents entry of food in the ________ (opening of wind pipe) during swallowing

Answer 16

epiglottis
glottis

Question 17

the oesophagus passing through the _______, _______ and _______ leads to the J-shaped bag like structure called ______

Answer 17

neck
thorax
diaphragm
stomach

Question 18

which sphincter regulates the opening of oesophagus into the stomach

Answer 18

gastro-oesophageal

Question 19

where is stomach located in the abdominal cavity

Answer 19

upper left portion

Question 20

three major parts of stomach

Answer 20

fundic region
cardiac portion
pyloric portion

Question 21

into which part of stomach does oesophagus open

Answer 21

cardiac region

Question 22

which part of stomach opens into the first small part of small intestine

Answer 22

pyloric portion

Question 23

small intestine is distinguishable into which three regions

Answer 23

duodenum
jejunum
ileum

Question 24

opening of stomach into the duodenum is guarded by which sphincter

Answer 24

pyloric

Question 25

which part of small intestine opens up into the large intestine

Answer 25

ileum

Question 26

large intestine is divided into which three parts

Answer 26

caecum colon rectum

Question 27

_______ is a small blind sac which contains symbiotic micro-organisms

Answer 27

caecum

Question 28

a narrow finger-like tubular projection, the vermiform ___________, which is a vestigial organ arises from the ________

Answer 28

appendix caecum

Question 29

the colon of large intestine is divided into three parts

Answer 29

ascending colon transverse colon descending colon

Question 30

descending colon opens up into rectum which opens up into the ________

Answer 30

anus

Question 31

four layers of alimentary canal from outward to inward

Answer 31

serosa muscularis sub-mucosa mucosa

Question 32

serosa is the outermost layer of alimentary canal and is made up of _________ and some ____________

Answer 32

mesothelium connective tissue

Question 33

what is mesothelium

Answer 33

epithelium of visceral organs

Question 34

muscularis is formed by _____________ usually arranged in outer __________ and inner __________ layer an _______ layer may be present in some regions

Answer 34

smooth muscles longitudinal circular oblique

Question 35

sub-mucosa is formed of ________________________ containing ___________________

Answer 35

loose connective tissue nerves, blood and lymph vessels

Question 36

in duodenum, ________ are also present in sub-mucosa

Answer 36

glands

Question 37

mucosa formes irregular folds called ________ in the ________ and small finger-like foldings called ________ in the ___________

Answer 37

rugae stomach villi small intestine

Question 38

cells lining the villi produce numerous projections called _________ giving a brush border appearance these modifications increase __________ enormously

Answer 38

microvilli surface area

Question 39

villi are supplied with a network of ___________ and a large lymph vessel called _______

Answer 39

capillaries lacteal

Question 40

mucosa has _______ cells which secrete mucus that helps in ____________

Answer 40

goblet lubrication

Question 41

mucosa also forms glands in the stomach called _____________ and crypts in between the bases of villi in the intestine called ________________

Answer 41

gastric glands crypts of lieberkuhn