I. Circulatory System Flashcards
Transport - The Circulatory System
connects with other systems
A. function: transport of
- respiratory gases
- transport of nutrients
- transport of water
- transport of wastes
- transport of hormones
- transport of immune cells
- transport of salts
- transport of minerals
- transport of vitamins
A. function: transport of
1. respiratory gases
oxygen and carbon dioxide
A. function: transport of
2. transport of nutrients
- villi
^ has capillary beds
^ absorb nutrients from digested food directly into the circulatory system
A. function: transport of
3. transport of water
- absorbed in colon then distributed
through circulatory system - lungs are constantly supplied with
water
A. function: transport of
4. transport of wastes
- ammonia in circulation of blood, then detoxified by liver and liver converts it to urea and sends blood with urea to kidneys, where urea is removed and exerted through urinary system then cleansed blood is put back in circulation
A. function: transport of
5. transport of hormones
- hormones are circulated through
circulatory system, stimulating
growth, etc.
A. function: transport of
6. transport of immune cells
- white blood cells fight disease and
pathogens (live in circulatory
system)
A. function: transport of
7. transport of salts
8. transport of minerals
9. transport of vitamins
- any material that needs to be
moved around the body is moved
through circulation
B. types
- no circulatory system
- gastrovascular cavity
- pseudocoelom
- open circulatory system
- closed circulatory system
B. types
1. no circulatory system
transport of diffusion
- diffusion is caused when a material
is dissolved in some sort of fluid - oxygen diffuses in cells
B. types
2. gastrovascular cavity
increases surface area but materials still move via diffusion
B. types
3. pseudocoelom
fluid in 3. pseudocoelom moves materials from point to point
- body cavity “coeloms”
- cavity filled with fluid
- diffusion through fluid is faster
B. types
4. open circulatory system
hemolymph seeps directly through tissues - no vessels
B. types
5. closed circulatory system
blood contained completely within vessels: arteries, capillaries, veins
^ blood flows through
a) single circuit
^ less efficient than dual
- in a fish, heart pumps blood to gills,
goes through a capillary bed and l
leaves in arteries through tissue and
drops off oxygen in digestive tract
and muscles and go through
another capillary bed and return to
heart and veins
- less able to produce oxygen than we
can because it only pumps once
b) dual circuit
- two circuits: pulmonary and
systemic
- two completely separate pumping
pathways
- pumped multiple: one left and one
right
- we can maintain blood pressure
both ways
- left has higher blood pressure
