Biology Questions and Answers
inside small tubes that connect the
animal external surface tissues and cells without theand ramify to
participation of blood. In arachnids,
besides the tracheal reslungs (thin folds resemblinpiration, bg leaves in aook (^)
book) may also exist.
- In arthropods why isn't
gas exchange done through
cutaneous diffusion?
In arthropods the impermeability of the
exoskeletogases difficult. In addition thn makes the passage oe newf (^)
methods of respiration present in
arthropods werbecause they were more efficient fore preserved by evolution
those animals.
- What is the type of
circulatory system present in
arthropods? Do these animals
have heart and respiratory
pigments?
In arthropods thopen (lacunar). Blood, e respiratory systemalso known as is
hemolymph, is pumped by a heart and
falls into and draining tissues.cavities (lacunas) irrigating
All arthroCrustaceanspods have a heart. and arachnids have (^)
respiratory pigments. Insects do not
have respiratory piblood does not carry gases (igments since thn themeir
gases reach tissuestracheal structures). and cells through
- What are respiratory
pigments? What is the
respiratory pigment present in
some arthropods? Which is
the analogous molecule in
humans?
Respiratory pigments are molecules able
to carry ogases present ixygen and other respiratoryn circulatory fluids.
In crustaceanshemocyanin is the respiratory p and in arachnidsigment. (^)
In humans the analogous phemoglobin. igment is
- How is the respiratory
system of insects (with its
independence between
circulation and respiration)
related to the motor agility of
some species of this arthropod
class?
Even having low speed and low pressurecirculatory system, since it is a lacunar
(open) circulatory system,perform extremely fast and exhaustive insects (^)
movements with their muscle fibers, like
wing beating. This is pthese animals the respiration isossible because in
independent from the open circulation.
Gas exchange is done with great spand efficiency by the tracheal systemeed
that puts cells in direct contact with air.
Muscles can then work fast and hard.
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