Small Intestine

The small intestine is a long, coiled tube located in the abdomen. It is part of the digestive system and plays a crucial role in the absorption of nutrients from food.

Anatomy of the Small Intestine

The small intestine is divided into three main parts: the duodenum, the jejunum, and the ileum. The duodenum is the first section and is where most of the digestion takes place. The jejunum is the middle section, and the ileum is the final section of the small intestine.

Function of the Small Intestine

The primary function of the small intestine is to absorb nutrients from the digested food. It does this through tiny finger-like projections called villi and microvilli, which increase the surface area available for absorption. The small intestine absorbs nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.

Study Guide

What are the three main parts of the small intestine?
- Duodenum
- Jejunum
- Ileum
What is the function of the small intestine?
The primary function of the small intestine is to absorb nutrients from the digested food.
How does the small intestine increase the surface area available for nutrient absorption?
Through tiny finger-like projections called villi and microvilli.
What types of nutrients are absorbed by the small intestine?
Carbohydrates, proteins, fats, vitamins, and minerals.

◂Science Worksheets and Study Guides Second Grade. What is science?

Vocabulary/Answer key

What is science?

The resources above cover the following skills:

LIFE SCIENCE

Ecosystems: Interactions, Energy, and Dynamics

Obtain information from literature and other media to illustrate that there are many different kinds of living things and that they exist in different places on land and in water (e.g., woodland, tundra, desert, rainforest, ocean, river).

EARTH AND SPACE SCIENCE

Earth’s Systems

Make observations from media to obtain information about Earth’s events that happen over a short period of time (e.g., tornados, volcanic explosions, earthquakes) or over a time period longer than one can observe (e.g., erosion of rocks, melting of glaciers).

Collect and evaluate data to identify water found on Earth and determine whether it is a solid or a liquid (e.g., glaciers as solid forms of water; oceans, lakes, rivers, streams as liquid forms of water).