Biology Questions and Answers
environment, like cnidarians and
poriferans, make diffusion. gas exchange by
Larger animalscontact with th with cells without dire environment or far ect
from it need special gas transportation
systems.respiratory an In these animals thd the circulatorye (^) systems
play this role.
- Beings from four phyla of
the animal kingdom “breath”
(do gas exchange) by
diffusion. Which are those
phyla? How is this type of
respiration associated to
features present in those
animals?
The phyla of the animal kingdom whose
beings do gas exchange by diffusion arthe poriferans, the cnidarians, the e
platyelminthes (flatworms) and the
nematodrespiration ies (roundworms). Tn these beings is possiblehis type of
because their tissues and cells are
relatively close to the exterior.
- Which animals make
tracheal respiration? Is there
a blood-like fluid that
participates in this process?
Insects and arachnids are the arthropod
animalsIn the body surface of that make tracheal r these animalsespiration.
there are many orifices called spiracles
that commthe tracheaunicate with smalle, through which air tubules,
penetrates and carbon dioxide is
expelled. The tracheae ramify into
tracheoles that ranimal. each all tissues of the
In the circulatoryblood only transports nutri system ofents; gas insects thees
are independently transported by the
tracheal system.- What is the difference
between respiration by
diffusion and cutaneous
respiration? Does blood
participate in cutaneous
respiration?
Cutaneous resas diffusion. In diffusion thpiration is not e gasesas simple
diffuse directly between the externalenvironment and the cells. In cutane (^) ous
respiration molecular oxygen penetrates
through the skin athe blood circulationnd it is collecte that then d by
distributes the gas to the tissues.
Carbon dioxitissues by the blood and takede is also collecten to thed from th e
skin to be eliminated to the
environment. So there is imparticipation of blood in cutaneportantous
respiration.
- Which animals make
cutaneous respiration?
Terrestrial annelids and adult
amphibians make cutan(in amphibians there is also pulmonaryeous respiration
respiration).
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