[DOC] [TLE] Crocodilia - Wikipedia [PAR] The Crocodilia (or Crocodylia) are an order of mostly large, predatory, 
semiaquatic reptiles. ... Although the term 'crocodiles' is sometimes used to refer 
to all of these, ... Large, solidly built, lizard-like reptiles, crocodilians have long 
flattened ... They have a four-chambered heart and, somewhat like birds, a 
unidirectional... [DOC] [TLE] Types of Circulatory Systems in Animals - Boundless [PAR] Fish have a single systemic circuit for blood, where the heart pumps the blood to 
the ... Other animals, such as amphibians, reptiles, birds, and mammals, have a ... 
of four chambers that has the oxygenated blood completely separated from the ... 
Organisms that are more complex, but still have only two layers of cells in their... [DOC] [TLE] The Vertebrate Animal Heart: Unevolvable, whether Primitive or ... [PAR] Crocodiles are the one reptilian exception, as they have 4 chambers (2 atria, 2 
ventricles). ... much different than the amphibian/reptile/bird/mammal heart (
figures 1b and c). Hearts are very complex--they're not just a bunch of random 
arteries and veins ... separate from de-oxygnated blood, because there is one 
ventricle for... [DOC] [TLE] Cardiovascular System: The Heart and Vessels of Mammals, Birds ... [PAR] As blood circulates through organs such as the liver and kidneys some of these ... 
The cardiovascular systems of mammals, birds, amphibians, reptiles, and fish are 
all slightly different. ... Mammalian and avian hearts have four chambers  two 
atria and two ... (The crocodile is sometimes said to have a four-chambered heart. [DOC] [TLE] Comparing cardiovascular systems across species - Fastbleep [PAR] Evolutionary advancements, for example the evolution of endothermy, have ... (
teleost) fish have a single circuit cardiovascular system, with only one atrium ... 
Teleosts, the most speciose group of fish, have a heart which comprises of four 
chambers. .... Crocodiles have a ventricular septum so can pressure separate, as 
in... [DOC] [TLE] Reptiles | Scholastic.com [PAR] When present in lizards and crocodilians, the dermal scales are separated ... only 
living species in its order, the male lacks a copulatory organ, and mating is ... 
Except for crocodilians, which have a four-chambered heart, all reptiles have a ... 
The ventricle of the lizard heart is incompletely partitioned into two subchambers
... [DOC] [TLE] The heart and heart conducting system in the kingdom of animals: A ... [PAR] These structures are separated from the surroundings not only functionally, .... 
Except for crocodiles (order Crocodylia), all recent reptiles have a three-chamber 
... the right aorta arises from the left ventricle and supplies other organs with the... [DOC] [TLE] crocodile | reptile | Britannica.com [PAR] Oct 18, 2016 ... Crocodiles are a living link with the dinosaur-like reptiles of ... Only one of the four 
suborders of crocodiles has survived to modern times. .... Burrows may extend for 
several metres in length and end in a chamber where individuals seek ..... 22 
teeth in each jaw; nasal bones separated from premaxillaries. [DOC] [TLE] iucncsg.org - The Crocodilian Body [PAR] In general, the body form of crocodilians is "lizard-like". ... Crocodilians have a "
minimum exposure" posture in water, in which only the eyes, the ... even though 
the two groups have been separated from each other for some 60 million years. 
... Along these canals are chambers in which "smell" is sensed - crocodilians 
have a... [DOC] [TLE] Animal Circulatory Systems - Kimball's Biology Pages [PAR] ... Hearts; Three Chambers: the Frog and Lizard; Four Chambers: Birds, 
Crocodiles, and ... a pump to push the blood through the system;; exchange 
organs to carry out ... All exchanges between blood and cells occur in the 
capillaries. ... This group of marine invertebrates has solved the problem by 
having separate pumps:. [DOC] [TLE] Reptile Structure and Function - Advanced | CK-12 Foundation [PAR] Dec 11, 2015 ... The only sea-going lizard needs to warm up before diving, as it is ectothermic

Question: Crocodilians are the only reptiles in which this organ has 4 separated chambers
Answer: the heart