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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
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
circulatory system
CIRCULATORY SYSTEM
  • moves fluid throughout the body
structures
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).

slide5
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.

movement of blood
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
slide8
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.
homework
Homework
  • Read p. 933-939
  • Problems p 939 #1,3,4,6
external function
EXTERNAL FUNCTION
  • exchange of gases between atmosphere and blood

mouth/nose  pharynx epiglottis trachea 

bronchi lungs

mechanism
MECHANISM
  • Large skeletal muscle (diaphragm) contracts pulling lungs down causing them to fill with air
internal function
INTERNAL FUNCTION
  • exchange of gases between blood and cells
  • Gases diffuse across due to concentration gradients

lungs (alveoli)  capillaries (carrying blood)

homework1
Homework
  • Read p. 933-939AND 946-950
  • Problems p 939 #1,3,4,6
  • Problems p 950 #1,3,4,6