- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies

- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who

# What are the 7 steps in human digestion?

Hello Shambhavi,

**
**

The seven steps of digestion are as follows:

**1. ****Ingestion:** It is the entry of food into the mouth. Chewing breaks the food into small pieces and saliva mixes with food that can be easily passed through to the stomach through the oesophagus.

**
**

**2. Propulsion: **It is the rhythmic movement of food, alternating contraction and relaxation (peristalsis) of smooth muscle along the lines of the wall of the digestive tract. This peristalsis is the forces that help in moving food in forwarding direction.

**3. Mechanical Digestion:** In mechanical digestion, the food is physically broken down into smaller fragments through the action of chewing (mouth), churning (stomach) and segmentation (small intestine).

**4. Chemical Digestion:** When food enters into the stomach the inner lining of the stomach secretes mucous, hydrochloric acid, and digestive juices. The acid makes the medium in the stomach acidic and helps the digestive juices which break down the proteins into simpler substances. The small intestine receives secretions from the liver and the pancreas to breakdown the carbohydrates, fats and proteins the digestion.

**5. Absorption: **The digested food passes into the blood vessels in the wall of the intestine which has thousands of finger like outgrowths. These are called as villi which increase the surface area for absorption of the digested food.

**6. Assimilation: **The absorbed substances are transported to different organs via the blood vessels. These substances are used to build complex substances like proteins. This is called as assimilation.

**7. ****Egestion:** The undigested and unabsorbed food enters into the large intestine where it water and some salts get absorbed from the undigested food material. The remaining waste passes to the rectum. This fecal matter is removed through anus. This is called egestion.

- Related Articles
- What are the 5 steps of digestion?\n6674"
- Simplify: \( (-9 \p 3)-(-49 \p 7) \)
- Give expressions for the following cases.(a) 7 added to \( p \)(b) 7 subtracted from \( p \)(c) p multiplied by 7(d) \( p \) divided by 7(e) 7 subtracted from \( -m \)(f) \( -p \) multiplied by 5(g) \( -p \) divided by 5(h) \( p \) multiplied by \( -5 \)
- Solve \( 2 p^{2} q^{2}-3 p q+4,5+7 p q-3 p^{2} q^{2} \).
- Give expressions for the following cases. (a) 7 added to \( p \)(b) 7 subtracted from \( p \)
- Subtract \( 4 p^{2} q-3 p q+5 p q^{2}-8 p+7 q-10 \) from \( 18-3 p-11 q+5 p q-2 p q^{2}+5 p^{2} q \).
- For what value of $p$, are $( 2p-1),\ 7$ and $\frac{11}{2}p$ three consecutive terms of an A.P.?
- If $p,\ q,\ r$ are in A.P., then show that $p^2( p+r),\ q^2( r+p),\ r^2( p+q)$ are also in A.P.
- Write $0.4\overline{7}$ in the form of $\frac{p}{q}$, where $p$ and $q$ are integers and $q≠0$.
- Simplify \( \frac{3^{9} \times p^{7}}{9^{3} \times p^{4}} \).
- Difference between ++*p, *p++ and *++p in c++
- Difference between ++*p, *p++ and *++p in C
- If p, q are real and p≠q, then show that the roots of the equation $(p-q)x^2+5(p+q)x-2(p-q)=0$ are real and unequal.
- What are the P class and NP class in TOC?
- Given that \( \frac{4 p+9 q}{p}=\frac{5 q}{p-q} \) and \( p \) and \( q \) are both positive. The value of $\frac{p}{q}$ is