Digestive
this animal eats decaying things
detrivore
all respiratory systems have this in common
moist, selectively permeable membranes
amphibians have these many chambers in their hearts
two
this is a food that NO animal can digest
cellulose
this organ is essential to the excretory system
kidney
this kind of animal filters the water around it
filter feeders
Earthworms use this structure to breathe
skin
this circulatory system allows the blood to come in direct contact with tissues
open
the process of removing metabolic wastes like ammonia is called this
excretion
this organ is the pump of every circulatory system
heart
this pouchlike extension allows animals to digest cellulose
rumen
what other organ system do the lungs rely on for gas exchange and transport
circulatory
in circulatory systems, these vessels are where gases and nutrients exchange
capillaries
reptiles produce this in their excretory system
uric acid
this heart chamber receives blood flow
atria
this is the kind of symbiosis between humans' digestive tracts and microorganisms
mutualistic
mammals have this structure in their lungs that massively increases surface area
alveoli
in a double-loop circulatory system, the first loop sends blood here
lungs/gills
grasshoppers use these to absorb digestive wastes like uric acid
malpighian tubules
this is the main breathing tube in vertebrates
trachea
these kind of teeth are characteristic of an herbivore
incisors
flat molars
grasshoppers use tracheal tubes all throughout their bodies, with these openings to the environment for air to move in and out
spiracles
4-chambered hearts give this advantage to mammals
they are able to be larger
these animals form urine in nephridia
annelids and mollusks
the presence of this in the blood of an animal would indicate their excretory system is not working properly
ammonia