The central organ of the nervous system, responsible for processing sensory information, controlling movement, and regulating body functions.

A root that grows from the main root, often in plants with a fibrous root system.

Gills or respiratory organs used by aquatic organisms to extract oxygen from water.

Relating to the gills or the branchial arches, which are the structures found in the pharyngeal region of fish and some other aquatic animals.

Having gills or gill-like structures, used for breathing in water.

Referring to a type of marine fish, such as blennies, or to processes involving them.

A structure in the basal part of a cell’s flagellum or cilium that helps in its formation.

The small area in the retina of the eye where the optic nerve enters, which has no photoreceptor cells and cannot detect light.

A bodily fluid that transports oxygen and nutrients to cells, removes waste products, and helps in immune defense and regulation of body temperature.

The classification of blood based on the presence or absence of certain antigens on the surface of red blood cells, commonly ABO and Rh systems.