A keel

The keel of the breastbone of birds.

a ridge on the inside of the division of the right and left primary bronchi

A ridged type of sculpture. Carina length and placement can be highly variable among species.

A ridge on the inner surface of the base of the trachea that runs anteroposteriorly, between two primary bronchi.

The constellation "The Keel"

A ridge or raised line.

Bladed middle part of the sternum to which large flight muscles are attached in avians. Also known as the keel.

An elevated ridge or keel.

median middorsal ridge on rostrum, oriented parallel to lateral margins of rostrum.

A ridge at the tracheal bifurcation, formed by the last tracheal cartilage that runs anteroposteriorly between the orifices of the two main bronchi. (from "carina" - the "v" shape of the bottom of a boat) image

A ridge in a sclerite.

Carina (IPA: , ) is a southern constellation which forms part of the old constellation of Argo Navis. It contains Canopus, the second brightest star in the night sky, and the supermassive star η Carinae which is embedded in the giant Eta Carinae Nebula (NGC 3372).