វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Leptocardia
Same as:
pharyngobranchii
ENGLISH MEANING
noun
1.
(PLURAL)
The
lowest
class
of
Vertebrata
,
including
only
the
Amphioxus
. The
heart
is
represented
only
by a
simple
pulsating
vessel
. The
blood
is
colorless
; the
brain
,
renal
organs
, and
limbs
are
wanting
, and the
backbone
is
represented
only
by a
simple
,
unsegmented
notochord
.