Living Systems

Focus Question:

How do the circulatory and respiratory systems work together?

Lesson 1-1B

Circulatory System ReviewWhat are the basic needs of all living cells?

How do the cells in multicellular organisms get the resources they need to stay alive?

What is the main function of the left side of the human heart?

What is the main function of the right side of the human heart?

What is the function of the red blood cells?

What are the main kinds of blood vessels and what functions do they perform?

Describe what happens when blood flows through the lungs.

Describe what happens when blood in capillaries flows past cells.

Circulatory and Respiratory Systems Video

Watch & listen for information that confirms what you know about the circulatory system and how it interacts with the respiratory system.

Think about how the new information relates to the big idea of the circulatory system, which provides life support for cells.

Video QuestionsWhat happens to heart rate during exercise?

Why does that happen?

How does this help cells in the body?

What happens when a blood vessel is cut?

How does this help cells in the body?

What other kinds of cells are in the blood and what do they do?

Vocabulary

Cell - the basic unit of life

Oxygen - an atmospheric gas needed by most living cells

Carbon dioxide - a waste gas produced by living cells

VocabularyHeart - a muscular organ that contracts rhythmically, producing a pulse with each contraction

Blood - a liquid tissue that flows to and from cells in blood vessels called arteries, veins, and capillaries

Arteries - carry blood away from the heart to the body

Veins - carry blood from the body to the heart

Capillaries - connect arteries and veins. Gases, nutrients, and wastes are exchanged between capillaries and cellsFour chambers of the human heart - right atrium, right ventricle, left atrium, and left ventricleCirculatory system - includes tissues (blood and blood vessels) and organs (heart) that transport life-support substances to cells and removes waste

Lung - organ in animals where gases, such as oxygen and carbon dioxide, pass between the atmosphere and the bloodRespiratory system - includes tissues and organs (lungs) that provide gas exchange between the blood and atmosphereTissue - a group of similar cells working together to perform a function

ContentWhat do cells need to stay alive?

Cells need water, food, oxygen, and waste disposal to stay alive.

Content

How do cells get the things they need to survive?Cells get the things they need to survive by the circulatory system which delivers water, sugar, and oxygen to cells and carries waste carbon dioxide away from cells.

ContentWhat is the general path taken by blood through the circulatory system?

The path the blood flows through the circulatory system is: from the body to the right atrium of the heart, to the right ventricle, to the lungs, to the left atrium, to the left ventricle, into arteries that flow into capillaries, which are in contact with cells. Blood returns to the heart in veins.

Your questions?