Circulatory System. The circulatory system is actually two systems combined: the cardiovascular system and the lymphatic system

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1 Circulatory System The circulatory system is actually two systems combined: the cardiovascular system and the lymphatic system

2 Lymphatic System This is a group of organs and tissues that collect the fluid the leaks from blood and returns it to the blood. The leaked fluid is called lymph It is an open system and lymph can move in and out of the vessels It is also part of the body s defenses against disease.

3 Cardiovascular System Your heart, blood and blood vessels make up the cardiovascular system that transports blood around your body Blood is the fluid that carries gases, nutrients and wastes through the body. It is a closed system, the blood is carried in vessels that form a loop

4 How do the systems work together? Every time your heart pumps, a little fluid is forced out of the walls of the tiniest blood vessels, the capillaries and the remaining fluid is collected by lymph capillaries. The lymphatic system is where white blood cells mature. Some of these white blood cells stay in the lymphatic system where they attack invading pathogens.

5 Homeostasis How does the cardiovascular system help maintain homeostasis? The blood maintains homeostasis by transporting hormones, nutrients and oxygen to cells and by carrying wastes away from cells. The circulation of blood also helps homeostasis when the body heats up, vessels get wider to allow it to rise closer to the skin and cool. When the body is cold, the blood vessels near the skin get narrower, this keeps the blood closer the internal organs, where it is warmer.

6 Lymphatic System Structures: made up of lymph nodes, lymph vessels, bone marrow, tonsils, thymus and spleen Lymph nodes are small, bean shaped organs that remove pathogens and dead cells. Lymph nodes are concentrated in the neck, armpits and groin

7 Label the missing ones on your page: Lymphatic System

8 Body Protectors In the event of an infection (bacteria or virus pathogen a disease producing agent), these white blood cells multiple and fight the infection White blood cells attack video

9 Lymphatic System Lymph vessels thin walled vessels that return lymph back to lymph nodes Bone marrow blood cells are produced Tonsils are small lymphatic organs at the back of your throat. They help defend your body against infection

10 Lymphatic System Thymus and Spleen these are organs in the body that house the white blood cells. From the thymus, and spleen, these cells travel all throughout the body to fight infections Video Crash Course Lymphatic System

11 Cardiovascular System Structures - Made up of heart, blood vessels, and blood

12 Cardiovascular System It is known as a Closed system blood stays inside the vessels

13 Heart The pump that sends blood around your body. It is about the size of your fist. The heart contracts and squeezes the blood in it, this squeezing creates pressure that pushes blood through the body. The heart has a left and right side, separated by a wall There are two chambers of each side of the heart

14 Heart In between the chambers, are valves that open and close These valves prevent blood from flowing backwards and make the lub-dub sound of a beating heart Heart video: How the heart works

15 Blood Vessels These are the tubes that carry your blood There are 3 types: arteries, capillary and veins

16 3 Types of Blood Vessels Arteries move blood away from the heart They have thick walls with a layer of smooth muscle Each heart beat pumps blood into your arteries at high pressure this is your blood pressure

17 3 Types of Blood Vessels Veins move blood toward the heart Valves keep the blood from flowing backwards

18 3 Types of Blood Vessels Arteries move blood away from the heart (usually oxygen rich) Veins move blood toward the heart (usually low in oxygen, except pulmonary veins) Capillaries microscopic blood vessels that connect arteries & veins

19 Functions of the Blood Carries oxygen from lungs to all body cells & removes carbon dioxide from the cells

20 Functions of the Blood Carries waste products of cell activity to kidneys to be removed from the body

21 Functions of the Blood Transports nutrients from digestive system to body cells

22 Functions of the Blood Materials in blood help fight infection and heal wounds (white blood cells & platelets)

23 Types of Blood Cells A B C Cell Function Red Blood Cells carry needed materials like oxygen and glucose White Blood Cells fight disease Platelets involved in blood clotting

24 The Heart Blood flow through the heart: Khan Academy Or you tube Crash Course The heart

25 Go with the Flow Heart Diagram

26 Summary Pulmonary artery (O 2 poor) lungs Pulmonary vein (O 2 rich) Heart Video Veins (O 2 poor) Arteries (O 2 rich) body

27 Lab

28 Lab Instructions Work in pairs or groups of 3. Follow the instructions, step by step on the lab pages If the day is nice, we can go outside!

The circulatory system transports blood to deliver important substances, such as oxygen, to cells and to remove wastes, such as carbon dioxide.

Section 1: The circulatory system transports blood to deliver important substances, such as oxygen, to cells and to remove wastes, such as carbon dioxide. K What I Know W What I Want to Find Out L What