Transcript Circulatory & Respiratory Systems

Circulatory & Respiratory Systems
Circulatory System
• FUNCTION
– Transport O2 , CO2 & waste
– Distributes nutrients &
hormones
– Regulates body temperature
– Protects against blood loss &
disease
Made up of…
• Heart
– Pumps blood
• Vessels
– Carry blood to body &
back to heart
• Blood
– Contains red & white
blood cells, platelets, and
plasma
Heart Parts
• Right Ventricle
• Right Atrium
• Left Ventricle
• Left Atrium
Flow of Blood in Heart
• From body through the
vena cava into the right
atrium
• Right atrium to right
ventricle
• Right ventricle to lungs
• From lungs to left atrium
• Left atrium to left
ventricle
• Left ventricle through the
aorta out to the body
Vessels
• Arteries & Arteriolies
– Smooth, thick muscle
– Pumps blood away from heart
– AORTA
• Capillaries
– Smallest vessel
– 1 cell thick
– Exchange of materials between
body & blood
• Venules & Veins
– Smooth, thick muscle
– Returns blood to heart
– VENA CAVA
Respiratory System
• Supplies the blood with
oxygen
– Red Blood Cells
(hemoglobin)
• Removes carbon dioxide
from blood
Made up of…
• Mouth & Nose
• Pharynx
• Trachea
• Bronchi
– Bronchioles
• Lungs
Gas Diffusion
• Capillaries from the
circulatory system are
next to the alveolus
(alveoli)
• This allows oxygen to
diffuse into the blood &
carbon dioxide to diffuse
into the alveolus