Circulatory System
The circulatory system, also known as the cardiovascular system, is responsible for transporting blood, nutrients, oxygen, and hormones to cells throughout the body. It consists of the heart, blood vessels, and blood.
Heart
The heart is a muscular organ that acts as a pump, sending blood to the lungs to pick up oxygen and then pumping it out to the rest of the body through a network of blood vessels.
Blood Vessels
There are three main types of blood vessels: arteries, veins, and capillaries. Arteries carry oxygen-rich blood away from the heart, veins carry oxygen-poor blood back to the heart, and capillaries are tiny blood vessels where oxygen and nutrients are exchanged with cells.
Blood
Blood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells carry oxygen, white blood cells fight infection, platelets help with clotting, and plasma is the liquid portion of blood that carries nutrients, hormones, and waste products.
Study Guide
- What is the main function of the circulatory system?
- Describe the role of the heart in the circulatory system.
- Identify the three main types of blood vessels and their functions.
- Explain the composition and functions of blood.
- How does the circulatory system work together with the respiratory system?
- What are some common diseases or conditions that affect the circulatory system?
Understanding the circulatory system is important for maintaining overall health and wellness. It is essential for delivering oxygen and nutrients to cells and removing waste products from the body.
.◂Science Worksheets and Study Guides Third Grade. Relationships among living things
Activity Lesson
Worksheet/Answer key
Worksheet/Answer key
Worksheet/Answer key
Worksheet/Answer key
Vocabulary/Answer key
Vocabulary/Answer key