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Turn in: Component of Blood Lab

Turn in: Component of Blood Lab. 5 minutes to study for quiz. Body Cavities Types of tissues Nervous System Endocrine System Feedback Loops & Homeostasis Blood. Warm-up 4/18: Describe the difference between positive and negative feedback. RESPIRATORY AND CIRCULATORY SYSTEMS.

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Turn in: Component of Blood Lab

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  1. Turn in: Component of Blood Lab • 5 minutes to study for quiz. • Body Cavities • Types of tissues • Nervous System • Endocrine System • Feedback Loops & Homeostasis • Blood

  2. Warm-up 4/18: Describe the difference between positive and negative feedback. RESPIRATORY AND CIRCULATORY SYSTEMS pp. 933-939AND 946-950

  3. CIRCULATORY SYSTEM • moves fluid throughout the body

  4. STRUCTURES • Heart – muscular organ that pumps blood to all parts of the body. a. divided into right side and left side by septum b. each side has an upper section (atrium) and lower section (ventricle).

  5. Vessels: smooth muscle surrounded by connective tissue a. arteries – carries blood from the heart b. aorta –Largest artery. c. veins –carries blood to the heart d. capillaries –narrow blood vessels that pass blood in single file.

  6. MOVEMENT OF BLOOD • right side: (deoxygenated) blood from body to heart to lungs Body vena cavae  rt. atrium  rt. ventricle  pulm. arteries  lungs • left side: (oxygenated) blood from lungs to the heart to body. • Lungs  Pulmonary veins  lt. atrium  lt. • ventricle aorta  body

  7. when the heart contracts, blood is squeezed from right atrium  right ventricle • when heart contracts a 2nd time, blood in right ventricle is sent through blood vessels into lungs.

  8. Homework • Read p. 933-939 • Problems p 939 #1,3,4,6

  9. RESPIRATORY

  10. EXTERNAL FUNCTION • exchange of gases between atmosphere and blood mouth/nose  pharynx epiglottis trachea  bronchi lungs

  11. MECHANISM • Large skeletal muscle (diaphragm) contracts pulling lungs down causing them to fill with air

  12. INTERNAL FUNCTION • exchange of gases between blood and cells • Gases diffuse across due to concentration gradients lungs (alveoli)  capillaries (carrying blood)

  13. Homework • Read p. 933-939AND 946-950 • Problems p 939 #1,3,4,6 • Problems p 950 #1,3,4,6

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