Turn in: Component of Blood Lab - PowerPoint PPT Presentation

• 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

pp. 933-939AND 946-950

• moves fluid throughout the body

• 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).

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.

• 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

• when heart contracts a 2nd time, blood in right ventricle is sent through blood vessels into lungs.

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

• exchange of gases between atmosphere and blood

mouth/nose  pharynx epiglottis trachea 

bronchi lungs

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

• exchange of gases between blood and cells
• Gases diffuse across due to concentration gradients

lungs (alveoli)  capillaries (carrying blood)

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