Advertisements
Advertisements
Question
Describe the human alimentary canal.
Advertisements
Solution
Human alimentary canal consists of:
- Mouth - It is the first organ in the sequence which helps in sucking, chewing, salivation and swallowing. The food is ingested through mouth,
- Pharynx - It is situated behind the soft palate and leads into oesophagus. It is divided into three parts - nasopharynx, oropharyx and laryngopharynx.
- Oesophagus - It lies upto the middle of the thorax, behind the trachea and the heart. It pushes the food down into the stomach by peristaltic movements,
- Stomach - It is the widest organ ofthe alimentary canal. It is J - shaped and is divided into three parts: cardiac, body and pyloric.
- Intestine - It is of two types: small intestine and large intestine. Small intestine is the longest part of the alimentary canal and comprises of three regions - duodenum, jejunum and ileum. It helps in the absorption of food, Large intestine is divisible into three parts - caecum, colon and rectum. It absorbs water from the food.
APPEARS IN
RELATED QUESTIONS
Fill in the blank and rewrite the completed statement:
.................... is the largest gland in the body.
What is the other name of food pipe?
What substances are contained in pancreatic juice? What are their functions?
If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected?
(a) proteins breaking down into amino acids
(b) starch breaking down into sugars
(c) fats breaking down into fatty acids and glycerol
(d) intestinal layer breaking down leading to ulcers
Draw a diagram of the human alimentary canal and label - gall bladder, pancreas, liver, and small intestine on it.
Fill in the blanks.
Incisors are used for _____ and _____ the food.
State whether the following statement is True or False.
Saliva changes starch into maltose.
What is the main function of bile?
Complete the following enzymatic reaction.
Maltose \[\ce{->[maltase]}\] ___________
Describe the following: Emulsification
Mark odd one in the series:
The question has four options. Choose the correct answer:
Monophyodont teeth occur in
Who is telling a lie?
Tongue: My taste-buds can tell only a sweet taste.
Eating fast-food ad junk food affects our health. Justify.
(i)______ and (ii)______ form the common bile duct.
The process of digestion is completed by:
During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
Name the parts of the alimentary canal where water gets absorbed from undigested food.
Mark the following statement as True or False. If false, write the correct statement.
All heterotrophs have a similar basic process of nutrition.
