September 12, 2017 Materials: ISN, pencil

1. September 12, 2017Materials: ISN, pencil • Bell Ringer: In all living organisms, the presence of what structure supports the cell theory? • Cell wall • Cell membrane • Vacuole • Chloroplast

2. EQ: What is the main function of the circulatory system? • CO: We will identify the main function of the circulatory system. • CT: I will complete a summary in my Cornell notes demonstrating my knowledge of the circulatory system. • SG: I will manage my time when working on independent class work.

3. Cardiovascular/Circulatory System

4. Cardiovascular System • Cardio = “heart” • Vascular = “vessels”

5. Circulatory (Cardiovascular) System • Made up of heart, vessels, and blood

6. Three Types of Blood Vessels • Arteries - move blood away from the heart

7. Three Types of Blood Vessels • Arteries - move blood away from the heart A is for AWAY • Veins - move blood toward the heart V is for VENTE pa ca

8. Three Types of Blood Vessels • Arteries - move blood away from the heart • Veins - move blood toward the heart • Capillaries - tiny blood vessels that connect arteries and veins C is for CONNECT

9. Functions of the Blood • Carries oxygen from lungs to all body cells and removes carbon dioxide from the cells White blood cell Red blood cell

10. Functions of the Blood • Red blood cells – contain hemoglobin which combines with oxygen. These cells deliver oxygen to the body. • Their disc shape helps them squeeze through vessels. • They wear out and are replaced every four months. New red blood cells are produced in the bone marrow. Red blood cell

11. Functions of the Blood • Carries waste products of cell activity to the kidneys to be removed from the body

12. Functions of the Blood • Transports nutrients from the digestive system to body cells

13. Functions of the Blood • Materials in the blood help fight infection and heal wounds (white blood cells and platelets). White blood cell: fights foreign invaders Platelets: help blood form clots

14. Functions of the Blood • White blood cells – are generally larger than red blood cells. They can move out of your blood through the capillary walls into tissue fluid and lymph. • They then travel around fighting disease. The white blood cells last 13–20 days, after which they are destroyed by the lymphatic system. White blood cell: fights foreign invaders

15. Functions of the Blood • Platelets – are irregularly-shaped, colorless bodies that wear out within 5–10 days • Their sticky surface lets them, along with calcium, vitamin K, and fibrinogen, form clots to stop bleeding. Platelets: help blood form clots

16. Homeostasis • It is the maintenance of a constant internal environment when outside conditions change. • When your body responds to change, it allows all systems to work properly.

17. How does circulation help maintain body temperature? • When the brain senses that body temperature is rising, it signals blood vessels in the skin to widen to release heat. • When the brain senses that the body temperature is too low, it signals the blood the blood vessels to get narrow or constrict to trap heat and this allow blood to stay close to internal organs to keep them warm.

18. https://www.youtube.com/watch?v=_eVG45_iF9U

19. Ted Talks • https://www.youtube.com/watch?v=ruM4Xxhx32U

20. 0 Which two substances does the blood transport away from body cells? • Oxygen & carbon dioxide • Carbon dioxide & waste • Nutrients & waste • Oxygen & nutrients

21. 0 What parts of the blood help fight off disease and heal injuries? • White blood cells & platelets • Red blood cells & platelets • White blood cells & red blood cells • White blood cells & plasma

22. 0 Which is not a function of the circulatory system? • Carry nutrients & oxygen to body cells • Carry carbon dioxide & waste away from body cells • Attack disease-causing bacteria • Produce chemicals that control body processes

23. Circulatory System • How does the circulatory system work with other body systems? • Respiratory System: Blood passes through the lungs in order to pick up fresh oxygen or drop off carbon dioxide. • Muscular System: Arteries carry oxygen and nutrients to the muscles; veins carry carbon dioxide and other waste away from the miscles. • Skeletal System: Blood cells are made in the bone marrow; which can be found inside bones. • Urinary System: Blood vessels run through the kidneys so they can be filtered of waste material.

24. Finding your Heart Rate • Let your fingers slide downwards onto the inside of your wrist, and gently feel for your pulse. • When you have found a steady beat, count how many beats in 30 seconds (use timer to time). • Multiply your score by 2, and that will tell you your pulse rate per minute

25. Finding your Respiration Rate • Count how many breaths you take in 30 seconds. • Multiply result by 2 to find you breath rate per minute.

26. Circulatory System Activity

28. Questions to Answer • Compare the heart rates of students in your group. Are the heart rates the same or different? • What is the average heart rate of the members in your group? • Add all heart rates together and divide by number of members in you group

29. The amount of time the heart takes to return to a normal at-rest rate after exercise is called recovery time. This is a measure of the body's general fitness. The shorter the recovery time, the higher the level of fitness. Determine recovery rate by first measuring and recording the pulse rate at rest. Next, run in place for two minutes. Now measure the pulse rate every minute until the at-rest rate is reached. How long did it take the heart to return to the normal rate?