What's the difference between branchia and branchiate?

Branchia

Definition:

(n.) A gill; a respiratory organ for breathing the air contained in water, such as many aquatic and semiaquatic animals have.

Example Sentences:

(1) Enteroviruses were isolated from 12% of the digestive tract samples collected from Anodonta cygnea (9.4%) and Dreysena polymorpha (13.2%) shell species and from 8.4% of the branchiae sample from fish species Rutilus rutilus, Perca fluviatilis and Silurus glanis.
(2) In saplings of Acipensar güldenstädti Brandt while adapting to sea water with salinity of 12.5%, the main functional changes in the chloride cells of the branchiae, the thyroid gland and interrenal tissue occur within the first 12 hours.
(3) The branchiae of Artemia adapted to triple-strength sea water (105 per mil salinity) were studied with the electron microscope.
(4) The detectable positions of calcinosis cutis were mostly at the injected sites, that is, outside the right brachium followed by bilateral-branchia and crura.

Definition:

Example Sentences:

(1) Sequence (c) signalled the beginning of the true vertebrates or branchiates (after the branchial arches which all 'vertebrates' share) since the production of a neurocranium, viscerocranium, cephalic armour, teeth and cranial peripheral ganglia was only possible with the acquisition of this developmental step.