Veins

Veins are blood vessels that carry blood back to the heart. They are part of the circulatory system, which is responsible for transporting blood, nutrients, and oxygen throughout the body.

Structure of Veins

Veins have thinner walls compared to arteries, as they are not under as much pressure from the pumping of the heart. They also have valves that help prevent the backflow of blood and assist in the upward flow of blood towards the heart.

Function of Veins

The primary function of veins is to transport deoxygenated blood from the body's tissues back to the heart and lungs, where it can be replenished with oxygen. Veins also help regulate the body's temperature and maintain proper blood pressure.

Study Guide

What is the function of veins in the circulatory system?
How do the walls of veins differ from those of arteries?
What is the role of valves in veins?
Why is it important for veins to transport deoxygenated blood back to the heart?

◂Science Worksheets and Study Guides Second Grade. Water Habitats

Vocabulary/Answer key

Water Habitats

Vocabulary/Answer key

Water Habitats

The resources above cover the following skills:

LIFE SCIENCE (NGSS)

Biological Evolution: Unity and Diversity

Students who demonstrate understanding can:

Make observations of plants and animals to compare the diversity of life in different habitats[Clarification Statement: Emphasis is on the diversity of living things in each of a variety of different habitats.] [Assessment Boundary: Assessment does not include specific animal and plant names in specific habitats.]