Anterior in Biological Definition

Morphogenesis

... genes that are most important for patterning of anterior parts (head and thorax) of the Drosophila ... to microtubules and are concentrated at the anterior ends of forming Drosophila eggs. Nanos mRNAs ... proteins a Bicoid protein gradient forms at the anterior end of the egg. Nanos protein forms a gradient at ...

Lung

... to the lungs themselves, birds have posterior and anterior air sacs (typically nine) which control air flow ... air currently within the lungs flows into the anterior air sacs. When the bird exhales, the fresh air ... lungs, and the stale air now contained within the anterior air sacs is expelled through the trachea and into ...

Morphogenesis

... genes that are most important for patterning of anterior parts (head and thorax) of the Drosophila ... to microtubules and are concentrated at the anterior ends of forming Drosophila eggs. Nanos mRNAs ... proteins a Bicoid protein gradient forms at the anterior end of the egg. Nanos protein forms a gradient at ...

Brain

... and right (Butler, 2000). The brains of craniates develop from the anterior section of a single dorsal nerve cord , which later becomes the spinal ... at various times in history for the study of diverse species. An anterior part of the telencephalon called the cerebrum makes up the largest ...

Liver

... the diaphragm on the right side of the upper abdomen. The liver lies anterior to the gallbladder and superior to the right kidney . The liver is ... on surface features. The falciform ligament is visible on the front ( anterior side) of the liver. This divides the liver into a left anatomical lobe, ...

Acrosome

... In sperm cells of many higher animals, the acrosome develops over the anterior half of its head. It is a cap-like structure derived from the Golgi apparatus . In Eutherian mammals , acrosome formation is completed during ...

Acrosome

... In sperm cells of many higher animals, the acrosome develops over the anterior half of its head. It is a cap-like structure derived from the Golgi apparatus . In Eutherian mammals , acrosome formation is completed during ...

Drosophila

... each day." (Burton) A female lays up to 2000 pearly white eggs, each with a pair of “wings” or respiratory “horns” near the anterior end; the eggs of all known Drosophila have one or more of these horns, the tips of which extend above the surface of the moist media in which the ...

Eye

... the same time, the brain also rotates the two eyeballs towards each other so they converge on the object. Ocular Anatomy Aqueous humour anterior chamber Blind spot Canal of Schlemm Ciliary muscle (or body) Cornea Conjunctiva Choroid Fovea Iris Lens ...

Vestibular system

... system contains three semicircular canals in each labyrinth. They are approximately orthogonal to each other, and are called horizontal , anterior , and posterior canal. (Alternatively, they may be referred to as lateral , superior , and inferior , respectively.) Push-pull systems ...